IP Library › Granted Patent US 12,244,369
Granted Patent B2
US 12,244,369 · App. 18/910,798 · Granted Mar 4, 2025

Systems and methods for radio frequency calibration exploiting channel reciprocity in distributed input distributed output wireless communications

Inventors: Antonio Forenza (San Francisco, CA); Fadi Saibi (Sunnyvale, CA); Timothy A. Pitman (San Francisco, CA); Stephen G. Perlman (Palo Alto, CA)
Assignee: Rearden, LLC
H04B7/0452H04B7/024H04B7/0456H04B7/0626H04B17/12H04L25/0224
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Quick Facts
Patent No.
US 12,244,369
App. No.
18/910,798
Granted
Mar 4, 2025
Kind
B2
Abstract

Systems and methods are described for radio frequency (RF) calibration in a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”) exploiting uplink/downlink channel reciprocity. The RF calibration is used to compute open-loop downlink precoder based on uplink channel estimates, thereby avoiding feedback overhead for channel state information as in closed-loop schemes. For example, a MU-MAS of one embodiment includes a wireless cellular network with one or multiple beacon stations, multiple client devices and multiple distributed antennas operating cooperatively via precoding methods to eliminate inter-client interference and increase network capacity.

Claims (55)

1. A wireless transceiver station comprising:

(a) a first plurality of antennas of the wireless transceiver station, where the first plurality includes more than 8 antennas; and

(b) hard-wired logic connected to each antenna in the first plurality of antennas, which when executed causes the wireless transceiver station to perform a method comprising steps of:

(1) estimating a plurality of radio frequency (RF) calibrations for uplink (UL)/downlink (DL) channel reciprocity in frequency selective channels for the first plurality of antennas;

(2) determining a plurality of UL channel state information (CSI) in response to receiving a plurality of UL transmissions in frequency selective channels by two or more of the first plurality of antennas from two or more of a second plurality of antennas of a plurality of user equipment devices (UEs);

(3) deriving a plurality DL CSI from the plurality of UL CSI based on UL/DL channel reciprocity; and

(4) precoding a plurality of orthogonal frequency-division multiplexing (OFDM) radio signals based on the plurality of DL CSI and the plurality of RF calibrations that are transmitted concurrently by the two or more of the first plurality of antennas, to cause the plurality of OFDM radio signals to interfere to create concurrent, non-interfering channels at a respective location of each antenna in the two or more of the second plurality of antennas.

2. The wireless transceiver station of claim 1 , wherein the DL CSI is derived from the plurality of UL CSI based on two or more of the plurality of RF calibrations and based on UL/DL channel reciprocity.

3. The wireless transceiver station of claim 1 , wherein the hard-wired logic is further programmed to perform the step of:

using the plurality of UL CSI to remove inter-channel interference from a plurality of UL transmissions received by two or more of the first plurality of antennas from two or more of the second plurality of antennas.

4. The wireless transceiver station of claim 1 , wherein the wireless transceiver station is within a radio access network (RAN).

5. The wireless transceiver station of claim 1 , wherein the hard-wired logic is also operatively connected to a third plurality of antennas of one or more of a plurality of wireless transceiver stations in a radio access network (RAN).

6. A wireless transceiver station comprising:

(a) a first plurality of antennas of the wireless transceiver station where the first plurality is more than 8 antennas; and

(b) a processor operatively connected to memory and operatively connected to each antenna in the first plurality of antennas wherein the memory includes instructions stored that in conjunction with hard-wired logic, when executed cause the wireless transceiver station to perform a method comprising steps of:

(1) estimating a plurality of radio frequency (RF) calibrations for uplink (UL)/downlink (DL) channel reciprocity in frequency selective channels for the first plurality of antennas;

(2) determining a plurality of UL channel state information (CSI) in response to receiving a plurality of UL transmissions in frequency selective channels by two or more of the first plurality of antennas from two or more of a second plurality of antennas of a plurality of user equipment devices (UEs);

(3) deriving a plurality of DL CSI from the plurality of UL CSI based on UL/DL channel reciprocity; and

(4) precoding a plurality of orthogonal frequency-division multiplexing (OFDM) radio signals based on the plurality of DL CSI and the plurality of RF calibrations that are transmitted concurrently by the two or more of the first plurality of antennas, to cause the plurality of OFDM radio signals to interfere to create concurrent, non-interfering channels at a respective location of each antenna in the two of more of the second plurality of antennas.

7. The wireless transceiver station of claim 6 , wherein the DL CSI is derived from the plurality of UL CSI based on two or more of the plurality of RF calibrations and based on UL/DL channel reciprocity.

8. The wireless transceiver station of claim 6 , wherein the processor and hard-wired logic are further programmed to perform the step of:

using the plurality of UL CSI to remove inter-channel interference from a plurality of UL transmissions received by two or more of the first plurality of antennas from two or more of the second plurality of antennas.

9. The wireless transceiver station of claim 6 , wherein the wireless transceiver station is within a radio access network (RAN).

10. The wireless transceiver station of claim 6 , wherein hard-wired logic is also operatively connected to a third plurality of antennas of one or more of a plurality of wireless transceiver stations in a radio access network (RAN).

11. The wireless transceiver station of claim 6 , wherein the processor is operatively connected to a third plurality of antennas of one or more of a plurality of wireless transceiver stations in a radio access network (RAN).

12. A method comprising:

(1) determining uplink (UL) channel state information (CSI) in response to receiving a plurality of UL transmissions in frequency selective channels by two or more of a first plurality of antennas of a wireless transceiver station from two or more of a second plurality of antennas of a plurality of user equipment devices (UEs), where the first plurality of antennas includes more than 8 antennas;

(2) deriving a plurality of downlink (DL) CSI from the plurality of UL CSI based on UL/DL channel reciprocity; and

(3) precoding a plurality of orthogonal frequency-division multiplexing (OFDM) radio signals based on the two or more of the plurality of DL CSI and a plurality of frequency selective radio frequency (RF) calibrations that are transmitted concurrently by the two or more of the first plurality of antennas, to cause the plurality of OFDM radio signals to interfere to create concurrent, non-interfering channels at a respective location of each antenna in the two or more of the second plurality of antennas.

13. The method of claim 12 , further comprising the step of:

deriving the DL CSI from the plurality of UL CSI based on two or more of the plurality of frequency selective RF calibrations and based on UL/DL channel reciprocity.

14. The method of claim 12 , further comprising the step of:

using the UL CSI to remove inter-channel interference from a plurality of UL transmissions received by two or more of the first plurality of antennas from two or more of the second plurality of antennas.

15. The method of claim 12 , wherein the wireless transceiver station is within a radio access network (RAN).

16. The method of claim 12 , wherein each antenna in the first plurality of antennas is operatively connected to hard-wired logic.

17. The method of claim 12 , wherein each antenna in the first plurality of antennas is operatively connected to a processor operatively connected to memory.

18. The method of claim 12 , wherein each antenna in the first plurality of antennas is operatively connected to hard-wired logic and to a processor operatively connected to memory.

19. The method of claim 12 , wherein each antenna in the first plurality of antennas is operatively connected to hard-wired logic and the hard-wired logic is also operatively connected to a third plurality of antennas of a second wireless transceiver station in a radio access network (RAN).

20. The method of claim 12 , wherein each antenna in the first plurality of antennas is operatively connected to a processor operatively connected to memory and the processor is also operatively connected to a third plurality of antennas of a second wireless transceiver station in a radio access network (RAN).

21. A method comprising:

(1) estimating a plurality of radio frequency (RF) calibrations for uplink (UL)/downlink (DL) channel reciprocity in frequency selective channels for two or more of a first plurality of antennas of a wireless transceiver station where the first plurality of antennas are more than 8 antennas;

(2) determining UL channel state information (CSI) in response to receiving a plurality of UL transmissions in frequency selective channels by two or more of the first plurality of antennas from two or more of a second plurality of antennas of a plurality of user equipment devices (UEs);

(3) deriving a plurality of DL CSI from the plurality of UL CSI based on UL/DL channel reciprocity;

(4) precoding a plurality of orthogonal frequency-division multiplexing (OFDM) radio signals based on the two or more of the plurality of DL CSI and the plurality of RF calibrations that are transmitted concurrently by the two or more of the first plurality of antennas, to cause the plurality of OFDM radio signals to deliberately interfere to create concurrent, non-interfering channels at a respective location of each antenna in the two or more of the second plurality of antennas.

22. The method of claim 21 , further comprising the step of:

deriving the DL CSI from the plurality of UL CSI based on the plurality of RF calibrations and based on UL/DL channel reciprocity.

23. The method of claim 21 , further comprising the step of:

using the UL CSI to remove inter-channel interference from a plurality of UL transmissions received by two or more of the first plurality of antennas from two or more of the second plurality of antennas.

24. The method of claim 21 , wherein the wireless transceiver station is within a radio access network (RAN).

25. The method of claim 21 , wherein each antenna in the first plurality of antennas is operatively connected to hard-wired logic.

26. The method of claim 21 , wherein each antenna in the first plurality of antennas is operatively connected to a processor operatively connected to memory.

27. The method of claim 21 , wherein each antenna in the first plurality of antennas is operatively connected to hard-wired logic and to a processor operatively connected to memory.

28. The method of claim 21 , wherein each antenna in the first plurality of antennas is operatively connected to hard-wired logic and the hard-wired logic is also operatively connected to a third plurality of antennas of a second wireless transceiver station in a radio access network (RAN).

29. The method of claim 21 , wherein each antenna in the first plurality of antennas is operatively connected to a processor operatively connected to memory and the processor is also operatively connected to a third plurality of antennas of a second wireless transceiver station in a radio access network (RAN).

30. The method of claim 21 , wherein each antenna in the first plurality of antennas is operatively connected to hard-wired logic and to a processor operatively connected to memory and the hard-wired logic and the processor are operatively connected to a third plurality of antennas of a second wireless transceiver station in a radio access network (RAN).

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 10, 2024
From: FORENZA, ANTONIO; SAIBI, FADI; PITMAN, TIMOTHY A.; PERLMAN, STEPHEN G.
To: REARDEN, LLC
Reel/Frame 068860/0655 →
Continuity (5)
Continuation 18109207 · Feb 13, 2023
Continuation 17498666 · Oct 11, 2021
Continuation 16719169 · Dec 18, 2019
Continuation 13844355 · Mar 15, 2013
Related Publication 20250038794A1 · Jan 30, 2025
References Cited (400)
US 4003016A · Remley · 1977 [cited by applicant]
US 4253193A · Kennard et al. · 1981 [cited by applicant]
US 4564935A · Kaplan · 1986 [cited by applicant]
US 4771289A · Masak · 1988 [cited by applicant]
US 5045862A · Alden et al. · 1991 [cited by applicant]
US 5088091A · Schroeder et al. · 1992 [cited by applicant]
US 5095500A · Tayloe et al. · 1992 [cited by applicant]
US 5097485A · O'Connor et al. · 1992 [cited by applicant]
US 5315309A · Rudow et al. · 1994 [cited by applicant]
US 5377183A · Dent · 1994 [cited by applicant]
US 5400037A · East · 1995 [cited by applicant]
US 5483667A · Faruque · 1996 [cited by applicant]
US 5555257A · Dent · 1996 [cited by applicant]
US 5600326A · Yu et al. · 1997 [cited by applicant]
US 5606165A · Chiou et al. · 1997 [cited by applicant]
US 5661765A · Ishizu · 1997 [cited by applicant]
US 5742253A · Conroy et al. · 1998 [cited by applicant]
US 5809422A · Raleigh et al. · 1998 [cited by applicant]
US 5838671A · Ishikawa et al. · 1998 [cited by applicant]
US 5872814A · McMeekin · 1999 [cited by applicant]
US 5983104A · Wickman et al. · 1999 [cited by applicant]
US 6005516A · Reudink et al. · 1999 [cited by applicant]
US 6005856A · Jensen et al. · 1999 [cited by applicant]
US 6014107A · Wiesenfarth · 2000 [cited by applicant]
US 6041365A · Kleinerman · 2000 [cited by applicant]
US 6052582A · Blasing et al. · 2000 [cited by applicant]
US 6061021A · Zibell · 2000 [cited by applicant]
US 6061023A · Daniel et al. · 2000 [cited by applicant]
US 6067290A · Paulraj et al. · 2000 [cited by applicant]
US 6232921B1 · Aiken et al. · 2001 [cited by applicant]
US 6252912B1 · Salinger · 2001 [cited by applicant]
US 6275738B1 · Kasevich et al. · 2001 [cited by applicant]
US 6308080B1 · Burt et al. · 2001 [cited by applicant]
US 6320853B1 · Wong et al. · 2001 [cited by applicant]
US 6323823B1 · Wong et al. · 2001 [cited by applicant]
US 6330460B1 · Wong et al. · 2001 [cited by applicant]
US 6377782B1 · Bishop et al. · 2002 [cited by applicant]
US 6400761B1 · Smee et al. · 2002 [cited by applicant]
US 6411612B1 · Halford et al. · 2002 [cited by applicant]
US 6421543B1 · Molnar · 2002 [cited by applicant]
US 6442151B1 · H'Mimy et al. · 2002 [cited by applicant]
US 6445910B1 · Oestreich · 2002 [cited by applicant]
US 6448937B1 · Aiken et al. · 2002 [cited by applicant]
US 6453177B1 · Wong et al. · 2002 [cited by applicant]
US 6459900B1 · Scheinert · 2002 [cited by applicant]
US 6473467B1 · Wallace et al. · 2002 [cited by applicant]
US 6484030B1 · Antoine et al. · 2002 [cited by applicant]
US 6519478B1 · Scherzer et al. · 2003 [cited by applicant]
US 6611231B2 · Crilly, Jr. et al. · 2003 [cited by applicant]
US 6654590B2 · Boros et al. · 2003 [cited by applicant]
US 6668161B2 · Boros et al. · 2003 [cited by applicant]
US 6684366B1 · Trott et al. · 2004 [cited by applicant]
US 6697644B2 · Scherzer et al. · 2004 [cited by applicant]
US 6718180B1 · Lundh et al. · 2004 [cited by applicant]
US 6718184B1 · Aiken et al. · 2004 [cited by applicant]
US 6760388B2 · Ketchum et al. · 2004 [cited by applicant]
US 6760599B1 · Uhlik · 2004 [cited by applicant]
US 6760603B1 · Scherzer et al. · 2004 [cited by applicant]
US 6763225B1 · Farmine et al. · 2004 [cited by applicant]
US 6771706B2 · Ling et al. · 2004 [cited by applicant]
US 6785341B2 · Walton et al. · 2004 [cited by applicant]
US 6791508B2 · Berry et al. · 2004 [cited by applicant]
US 6794939B2 · Kim et al. · 2004 [cited by applicant]
US 6795413B1 · Uhlik · 2004 [cited by applicant]
US 6799026B1 · Scherzer et al. · 2004 [cited by applicant]
US 6801580B2 · Kadous · 2004 [cited by applicant]
US 6804311B1 · Dabak et al. · 2004 [cited by applicant]
US 6834043B1 · Vook et al. · 2004 [cited by applicant]
US 6836673B1 · Trott · 2004 [cited by applicant]
US 6847832B2 · Wong et al. · 2005 [cited by applicant]
US 6862271B2 · Medvedev et al. · 2005 [cited by applicant]
US 6888795B2 · Gupta et al. · 2005 [cited by applicant]
US 6888809B1 · Foschini et al. · 2005 [cited by applicant]
US 6888899B2 · Raleigh et al. · 2005 [cited by applicant]
US 6895258B1 · Scherzer et al. · 2005 [cited by applicant]
US 6901062B2 · Scherzer et al. · 2005 [cited by applicant]
US 6920192B1 · Laroia et al. · 2005 [cited by applicant]
US 6925127B1 · Dent · 2005 [cited by applicant]
US 6956537B2 · Scherzer et al. · 2005 [cited by applicant]
US 6963742B2 · Boros et al. · 2005 [cited by applicant]
US 6970682B2 · Crilly, Jr. et al. · 2005 [cited by applicant]
US 6978150B2 · Hamabe · 2005 [cited by applicant]
US 6996060B1 · Dahlby et al. · 2006 [cited by applicant]
US 7006043B1 · Nalbandian · 2006 [cited by applicant]
US 7013144B2 · Yamashita et al. · 2006 [cited by applicant]
US 7016649B1 · Narasimhan et al. · 2006 [cited by applicant]
US 7020490B2 · Khatri · 2006 [cited by applicant]
US 7027415B1 · Dahlby et al. · 2006 [cited by applicant]
US 7027523B2 · Jalali et al. · 2006 [cited by applicant]
US 7027837B1 · Uhlik et al. · 2006 [cited by applicant]
US 7031336B2 · Scherzer et al. · 2006 [cited by applicant]
US 7031754B2 · Scherzer et al. · 2006 [cited by applicant]
US 7068704B1 · Orr · 2006 [cited by applicant]
US 7072413B2 · Walton et al. · 2006 [cited by applicant]
US 7072693B2 · Farlow et al. · 2006 [cited by applicant]
US 7075485B2 · Song et al. · 2006 [cited by applicant]
US 7079809B1 · Scherzer · 2006 [cited by applicant]
US 7085240B2 · Wu et al. · 2006 [cited by applicant]
US 7095723B2 · Sezgin et al. · 2006 [cited by applicant]
US 7096040B1 · Scherzer et al. · 2006 [cited by applicant]
US 7116723B2 · Kim et al. · 2006 [cited by applicant]
US 7117014B1 · Van Rensburg et al. · 2006 [cited by applicant]
US 7120440B2 · Cho et al. · 2006 [cited by applicant]
US 7139527B2 · Tamaki et al. · 2006 [cited by applicant]
US 7142154B2 · Quilter et al. · 2006 [cited by applicant]
US 7154936B2 · Bjerke et al. · 2006 [cited by applicant]
US 7154960B2 · Liu et al. · 2006 [cited by applicant]
US 7158493B1 · Uhlik et al. · 2007 [cited by applicant]
US 7167684B2 · Kadous et al. · 2007 [cited by applicant]
US 7181167B2 · Onggosanusi et al. · 2007 [cited by applicant]
US 7184492B2 · Dent · 2007 [cited by applicant]
US 7193991B2 · Melpignano et al. · 2007 [cited by applicant]
US 7194006B2 · Wong et al. · 2007 [cited by applicant]
US 7197082B2 · Alexiou et al. · 2007 [cited by applicant]
US 7197084B2 · Ketchum et al. · 2007 [cited by applicant]
US 7197282B2 · Dent et al. · 2007 [cited by applicant]
US 7209511B2 · Dent · 2007 [cited by applicant]
US 7218689B2 · Gupta · 2007 [cited by applicant]
US 7224942B2 · Dent · 2007 [cited by applicant]
US 7227855B1 · Barratt et al. · 2007 [cited by applicant]
US 7242724B2 · Alexiou et al. · 2007 [cited by applicant]
US 7242964B1 · Aiken et al. · 2007 [cited by applicant]
US 7248645B2 · Vialle et al. · 2007 [cited by applicant]
US 7248841B2 · Agee et al. · 2007 [cited by applicant]
US 7248879B1 · Walton et al. · 2007 [cited by applicant]
US 7269231B2 · Ding et al. · 2007 [cited by applicant]
US 7272294B2 · Zhou et al. · 2007 [cited by applicant]
US 7299071B1 · Barratt et al. · 2007 [cited by applicant]
US 7310680B1 · Graham · 2007 [cited by applicant]
US 7313403B2 · Gong et al. · 2007 [cited by applicant]
US 7327795B2 · Oprea · 2008 [cited by applicant]
US 7333540B2 · Yee · 2008 [cited by applicant]
US 7336626B1 · Barratt et al. · 2008 [cited by applicant]
US 7339906B1 · Dahlby et al. · 2008 [cited by applicant]
US 7339908B2 · Uhlik et al. · 2008 [cited by applicant]
US 7352774B2 · Uhlik et al. · 2008 [cited by applicant]
US 7352819B2 · Lakshmipathi et al. · 2008 [cited by applicant]
US 7363376B2 · Uhlik et al. · 2008 [cited by applicant]
US 7366202B2 · Scherzer et al. · 2008 [cited by applicant]
US 7366245B2 · Li et al. · 2008 [cited by applicant]
US 7366519B2 · Jason et al. · 2008 [cited by applicant]
US 7369841B1 · Uhlik et al. · 2008 [cited by applicant]
US 7369876B2 · Lee et al. · 2008 [cited by applicant]
US 7394858B2 · Sadowsky et al. · 2008 [cited by applicant]
US 7406315B2 · Uhlik et al. · 2008 [cited by applicant]
US 7412212B2 · Hottinen · 2008 [cited by applicant]
US 7418053B2 · Perlman et al. · 2008 [cited by applicant]
US 7430197B1 · Uhlik · 2008 [cited by applicant]
US 7437177B2 · Ozluturk et al. · 2008 [cited by applicant]
US 7450489B2 · Sandhu · 2008 [cited by applicant]
US 7451839B2 · Perlman · 2008 [cited by applicant]
US 7471736B2 · Ding et al. · 2008 [cited by applicant]
US 7486931B2 · Cho et al. · 2009 [cited by applicant]
US 7492743B2 · Uhlik · 2009 [cited by applicant]
US 7499548B2 · Meandzija et al. · 2009 [cited by applicant]
US 7502420B2 · Ketchum · 2009 [cited by applicant]
US 7519011B2 · Petrus et al. · 2009 [cited by applicant]
US 7548752B2 · Sampath et al. · 2009 [cited by applicant]
US 7558575B2 · Losh et al. · 2009 [cited by applicant]
US 7599420B2 · Forenza et al. · 2009 [cited by applicant]
US 7599443B2 · Ionescu et al. · 2009 [cited by applicant]
US 7606192B2 · Uhlik · 2009 [cited by applicant]
US 7609751B1 · Giallorenzi et al. · 2009 [cited by applicant]
US 7616698B2 · Sun et al. · 2009 [cited by applicant]
US 7630337B2 · Zheng et al. · 2009 [cited by applicant]
US 7633944B1 · Chang et al. · 2009 [cited by applicant]
US 7633994B2 · Forenza et al. · 2009 [cited by applicant]
US 7636381B2 · Forenza et al. · 2009 [cited by applicant]
US 7684753B2 · Ionescu et al. · 2010 [cited by applicant]
US 7688789B2 · Pan et al. · 2010 [cited by applicant]
US 7689639B2 · Dent · 2010 [cited by applicant]
US 7719993B2 · Li et al. · 2010 [cited by applicant]
US 7729316B2 · Uhlik · 2010 [cited by applicant]
US 7729433B2 · Jalloul et al. · 2010 [cited by applicant]
US 7747250B2 · Larsson et al. · 2010 [cited by applicant]
US 7751368B2 · Li et al. · 2010 [cited by applicant]
US 7751843B2 · Butala · 2010 [cited by applicant]
US 7756222B2 · Chen et al. · 2010 [cited by applicant]
US 7801490B1 · Scherzer · 2010 [cited by applicant]
US 7849173B1 · Uhlik · 2010 [cited by applicant]
US 7864663B2 · Dent · 2011 [cited by applicant]
US 7948444B2 · Signell et al. · 2011 [cited by applicant]
US 7961809B2 · Bourdoux et al. · 2011 [cited by applicant]
US 7978673B1 · Uhlik et al. · 2011 [cited by applicant]
US 7986742B2 · Ketchum et al. · 2011 [cited by applicant]
US 7995973B2 · Dent et al. · 2011 [cited by applicant]
US 8041362B2 · Li et al. · 2011 [cited by applicant]
US 8081944B2 · Li · 2011 [cited by applicant]
US 8086271B2 · Dent · 2011 [cited by applicant]
US 8090320B2 · Dent et al. · 2012 [cited by applicant]
US 8116710B2 · Dent et al. · 2012 [cited by applicant]
US 8126510B1 · Samson et al. · 2012 [cited by applicant]
US 8170081B2 · Forenza et al. · 2012 [cited by applicant]
US 8260198B2 · Yamaura · 2012 [cited by applicant]
US 8320432B1 · Chockalingam et al. · 2012 [cited by applicant]
US 8428177B2 · Tsai et al. · 2013 [cited by applicant]
US 8451764B2 · Chao et al. · 2013 [cited by applicant]
US 8469800B2 · Lemay et al. · 2013 [cited by applicant]
US 8482462B2 · Komijani et al. · 2013 [cited by applicant]
US 8548384B2 · Lee et al. · 2013 [cited by applicant]
US 8612619B2 · Guo et al. · 2013 [cited by applicant]
US 8638880B2 · Baldemair et al. · 2014 [cited by applicant]
US 8654815B1 · Forenza et al. · 2014 [cited by applicant]
US 8675768B2 · Xu et al. · 2014 [cited by applicant]
US 8705484B2 · Caire et al. · 2014 [cited by applicant]
US 8731480B2 · Kim et al. · 2014 [cited by applicant]
US 8787469B2 · Kim et al. · 2014 [cited by applicant]
US 8797970B2 · Xing et al. · 2014 [cited by applicant]
US 8849339B2 · Anto et al. · 2014 [cited by applicant]
US 8902862B2 · Yu et al. · 2014 [cited by applicant]
US 8971380B2 · Forenza et al. · 2015 [cited by applicant]
US 8989155B2 · Forenza et al. · 2015 [cited by applicant]
US 9089002B2 · Abraham et al. · 2015 [cited by applicant]
US 9094180B2 · Zirwas et al. · 2015 [cited by applicant]
US 9179495B1 · Scherzer et al. · 2015 [cited by applicant]
US 9252858B2 · Abbasfar et al. · 2016 [cited by applicant]
US 9307506B1 · Kelly et al. · 2016 [cited by applicant]
US 9331882B2 · Fehri et al. · 2016 [cited by applicant]
US 9685997B2 · Forenza et al. · 2017 [cited by applicant]
US 9698881B2 · Nammi et al. · 2017 [cited by applicant]
US 10205513B1 · Winters et al. · 2019 [cited by applicant]
US 10277290B2 · Forenza et al. · 2019 [cited by applicant]
US 10349417B2 · Forenza et al. · 2019 [cited by applicant]
US 10637554B2 · Zhu et al. · 2020 [cited by applicant]
US 10749583B2 · Park et al. · 2020 [cited by applicant]
US 10804985B2 · Ge et al. · 2020 [cited by applicant]
US 10985811B2 · Forenza et al. · 2021 [cited by applicant]
US 11190947B2 · Perlman et al. · 2021 [cited by applicant]
US 20010031647A1 · Scherzer et al. · 2001 [cited by applicant]
US 20020027985A1 · Rashid-Farrokhi · 2002 [cited by applicant]
US 20020041575A1 · Karabinis et al. · 2002 [cited by applicant]
US 20020051433A1 · Affes et al. · 2002 [cited by applicant]
US 20020061004A1 · Lomp et al. · 2002 [cited by applicant]
US 20020097705A1 · Sezgin et al. · 2002 [cited by applicant]
US 20020136169A1 · Struhsaker et al. · 2002 [cited by applicant]
US 20020142723A1 · Foschini et al. · 2002 [cited by applicant]
US 20020168017A1 · Berthet et al. · 2002 [cited by applicant]
US 20020177447A1 · Walton et al. · 2002 [cited by applicant]
US 20020181444A1 · Acampora · 2002 [cited by applicant]
US 20020193146A1 · Wallace et al. · 2002 [cited by applicant]
US 20030003863A1 · Thielecke et al. · 2003 [cited by applicant]
US 20030012315A1 · Fan · 2003 [cited by applicant]
US 20030036359A1 · Dent et al. · 2003 [cited by applicant]
US 20030043887A1 · Hudson · 2003 [cited by applicant]
US 20030043929A1 · Sampath · 2003 [cited by applicant]
US 20030045297A1 · Dent · 2003 [cited by applicant]
US 20030048753A1 · Jalali · 2003 [cited by applicant]
US 20030065779A1 · Malik et al. · 2003 [cited by applicant]
US 20030072379A1 · Ketchum · 2003 [cited by applicant]
US 20030092456A1 · Dent · 2003 [cited by applicant]
US 20030114165A1 · Mills · 2003 [cited by applicant]
US 20030114193A1 · Kavak et al. · 2003 [cited by applicant]
US 20030119556A1 · Khan et al. · 2003 [cited by applicant]
US 20030125026A1 · Tsunehara et al. · 2003 [cited by applicant]
US 20030125040A1 · Walton et al. · 2003 [cited by applicant]
US 20030128658A1 · Walton et al. · 2003 [cited by applicant]
US 20030139196A1 · Medvedev et al. · 2003 [cited by applicant]
US 20030147362A1 · Dick et al. · 2003 [cited by applicant]
US 20030148738A1 · Das et al. · 2003 [cited by applicant]
US 20030156056A1 · Perry · 2003 [cited by applicant]
US 20030161282A1 · Medvedev et al. · 2003 [cited by applicant]
US 20030211843A1 · Song et al. · 2003 [cited by applicant]
US 20030214431A1 · Hager et al. · 2003 [cited by applicant]
US 20030220112A1 · Bugeja · 2003 [cited by applicant]
US 20030235146A1 · Wu et al. · 2003 [cited by applicant]
US 20040009755A1 · Yoshida · 2004 [cited by applicant]
US 20040042556A1 · Medvedev et al. · 2004 [cited by applicant]
US 20040043784A1 · Czaja et al. · 2004 [cited by applicant]
US 20040051676A1 · Travis et al. · 2004 [cited by applicant]
US 20040063450A1 · Uhlik · 2004 [cited by applicant]
US 20040082356A1 · Walton et al. · 2004 [cited by applicant]
US 20040095907A1 · Agee et al. · 2004 [cited by applicant]
US 20040097197A1 · Juncker et al. · 2004 [cited by applicant]
US 20040131011A1 · Sandell et al. · 2004 [cited by applicant]
US 20040136349A1 · Walton et al. · 2004 [cited by applicant]
US 20040152480A1 · Willars et al. · 2004 [cited by applicant]
US 20040170430A1 · Gorokhov · 2004 [cited by applicant]
US 20040176097A1 · Wilson et al. · 2004 [cited by applicant]
US 20040179627A1 · Ketchum et al. · 2004 [cited by applicant]
US 20040185909A1 · Alexiou et al. · 2004 [cited by applicant]
US 20040190636A1 · Oprea · 2004 [cited by applicant]
US 20040203347A1 · Nguyen · 2004 [cited by applicant]
US 20040203987A1 · Butala · 2004 [cited by applicant]
US 20040209579A1 · Vaidyanathan · 2004 [cited by applicant]
US 20040252632A1 · Bourdoux et al. · 2004 [cited by applicant]
US 20050003865A1 · Lastinger et al. · 2005 [cited by applicant]
US 20050020237A1 · Alexiou et al. · 2005 [cited by applicant]
US 20050024231A1 · Fincher et al. · 2005 [cited by applicant]
US 20050031047A1 · Maltsev et al. · 2005 [cited by applicant]
US 20050041750A1 · Lau · 2005 [cited by applicant]
US 20050041751A1 · Nir et al. · 2005 [cited by applicant]
US 20050042988A1 · Hoek et al. · 2005 [cited by applicant]
US 20050043031A1 · Cho et al. · 2005 [cited by applicant]
US 20050047515A1 · Walton et al. · 2005 [cited by applicant]
US 20050058217A1 · Sandhu et al. · 2005 [cited by applicant]
US 20050075110A1 · Posti et al. · 2005 [cited by applicant]
US 20050085267A1 · Lemson et al. · 2005 [cited by applicant]
US 20050096058A1 · Warner et al. · 2005 [cited by applicant]
US 20050101259A1 · Tong et al. · 2005 [cited by applicant]
US 20050101352A1 · Logothetis et al. · 2005 [cited by applicant]
US 20050111406A1 · Pasanen et al. · 2005 [cited by applicant]
US 20050111599A1 · Walton et al. · 2005 [cited by applicant]
US 20050148368A1 · Scheinert et al. · 2005 [cited by applicant]
US 20050157683A1 · Ylitalo et al. · 2005 [cited by applicant]
US 20050169396A1 · Baier et al. · 2005 [cited by applicant]
US 20050174977A1 · Pedlar et al. · 2005 [cited by applicant]
US 20050186991A1 · Bateman · 2005 [cited by applicant]
US 20050232135A1 · Mukai et al. · 2005 [cited by applicant]
US 20050239406A1 · Shattil · 2005 [cited by applicant]
US 20050259627A1 · Song et al. · 2005 [cited by applicant]
US 20050265273A1 · Karabinis et al. · 2005 [cited by applicant]
US 20050271009A1 · Shirakabe et al. · 2005 [cited by applicant]
US 20050287962A1 · Mehta et al. · 2005 [cited by applicant]
US 20060002496A1 · Wallace et al. · 2006 [cited by applicant]
US 20060023803A1 · Perlman et al. · 2006 [cited by applicant]
US 20060032979A1 · Mitchell et al. · 2006 [cited by applicant]
US 20060046658A1 · Cruz et al. · 2006 [cited by applicant]
US 20060050804A1 · Leclair · 2006 [cited by applicant]
US 20060056855A1 · Nakagawa et al. · 2006 [cited by applicant]
US 20060062180A1 · Sayeedi et al. · 2006 [cited by applicant]
US 20060098568A1 · Oh et al. · 2006 [cited by applicant]
US 20060098754A1 · Kim et al. · 2006 [cited by applicant]
US 20060146755A1 · Pan et al. · 2006 [cited by applicant]
US 20060159160A1 · Kim et al. · 2006 [cited by applicant]
US 20060159187A1 · Wang et al. · 2006 [cited by applicant]
US 20060165120A1 · Karabinis · 2006 [cited by applicant]
US 20060198461A1 · Hayase · 2006 [cited by applicant]
US 20060199584A1 · Bergstrom et al. · 2006 [cited by applicant]
US 20060203708A1 · Sampath et al. · 2006 [cited by applicant]
US 20060209979A1 · Sandell et al. · 2006 [cited by applicant]
US 20060264242A1 · Dent · 2006 [cited by applicant]
US 20060270359A1 · Karmi et al. · 2006 [cited by applicant]
US 20060276227A1 · Dravida · 2006 [cited by applicant]
US 20060281421A1 · Pan et al. · 2006 [cited by applicant]
US 20060287743A1 · Sampath et al. · 2006 [cited by applicant]
US 20060292990A1 · Karabinis et al. · 2006 [cited by applicant]
US 20070004337A1 · Biswas et al. · 2007 [cited by applicant]
US 20070015526A1 · Hansen · 2007 [cited by applicant]
US 20070025464A1 · Perlman · 2007 [cited by applicant]
US 20070054633A1 · Piirainen · 2007 [cited by applicant]
US 20070058590A1 · Wang et al. · 2007 [cited by applicant]
US 20070064823A1 · Hwang et al. · 2007 [cited by applicant]
US 20070066331A1 · Zheng et al. · 2007 [cited by applicant]
US 20070082674A1 · Pedersen et al. · 2007 [cited by applicant]
US 20070086400A1 · Shida et al. · 2007 [cited by applicant]
US 20070093273A1 · Cai · 2007 [cited by applicant]
US 20070093274A1 · Jafarkhani et al. · 2007 [cited by applicant]
US 20070099665A1 · Kim et al. · 2007 [cited by applicant]
US 20070132653A1 · Weller et al. · 2007 [cited by applicant]
US 20070135125A1 · Kim et al. · 2007 [cited by applicant]
US 20070183362A1 · Mondal et al. · 2007 [cited by applicant]
US 20070206504A1 · Koo · 2007 [cited by examiner]
US 20070211747A1 · Kim · 2007 [cited by applicant]
US 20070220151A1 · Li et al. · 2007 [cited by applicant]
US 20070242782A1 · Han et al. · 2007 [cited by applicant]
US 20070243871A1 · Chen et al. · 2007 [cited by applicant]
US 20070249380A1 · Stewart et al. · 2007 [cited by applicant]
US 20070253508A1 · Zhou et al. · 2007 [cited by applicant]
US 20070254602A1 · Li et al. · 2007 [cited by applicant]
US 20070258531A1 · Chen et al. · 2007 [cited by applicant]
US 20070263736A1 · Yuda et al. · 2007 [cited by applicant]
US 20070280116A1 · Wang et al. · 2007 [cited by applicant]
US 20070284474A1 · Olson et al. · 2007 [cited by applicant]
US 20070286298A1 · Choi et al. · 2007 [cited by applicant]
US 20080013644A1 · Hugl et al. · 2008 [cited by applicant]
US 20080051150A1 · Tsutsui · 2008 [cited by applicant]
US 20080080631A1 · Forenza et al. · 2008 [cited by applicant]
US 20080080635A1 · Hugl et al. · 2008 [cited by applicant]
US 20080089396A1 · Zhang et al. · 2008 [cited by applicant]
US 20080102881A1 · Han et al. · 2008 [cited by applicant]
US 20080107135A1 · Ibrahim · 2008 [cited by applicant]
US 20080117961A1 · Han et al. · 2008 [cited by applicant]
US 20080118004A1 · Forenza et al. · 2008 [cited by applicant]
US 20080125051A1 · Kim et al. · 2008 [cited by applicant]
US 20080130790A1 · Forenza et al. · 2008 [cited by applicant]
US 20080132281A1 · Kim et al. · 2008 [cited by applicant]
US 20080165866A1 · Teo et al. · 2008 [cited by applicant]
US 20080181285A1 · Hwang et al. · 2008 [cited by applicant]
US 20080192683A1 · Han et al. · 2008 [cited by applicant]
US 20080192697A1 · Shaheen · 2008 [cited by applicant]
US 20080200211A1 · Hwang et al. · 2008 [cited by applicant]
US 20080205538A1 · Han et al. · 2008 [cited by applicant]
US 20080214185A1 · Cho et al. · 2008 [cited by applicant]
US 20080227422A1 · Hwang · 2008 [cited by examiner]
US 20080232394A1 · Kozek et al. · 2008 [cited by applicant]
US 20080233902A1 · Pan et al. · 2008 [cited by applicant]
US 20080239938A1 · Jalloul et al. · 2008 [cited by applicant]
US 20080260054A1 · Myung et al. · 2008 [cited by applicant]
US 20080261587A1 · Lennartson et al. · 2008 [cited by applicant]
US 20080267142A1 · Mushkin et al. · 2008 [cited by applicant]
US 20080268833A1 · Huang et al. · 2008 [cited by applicant]
US 20080292011A1 · Yang · 2008 [cited by applicant]
US 20080317014A1 · Veselinovic et al. · 2008 [cited by applicant]
US 20090010204A1 · Pratt, Jr. et al. · 2009 [cited by applicant]
US 20090023467A1 · Huang et al. · 2009 [cited by applicant]
US 20090034636A1 · Kotecha et al. · 2009 [cited by applicant]
US 20090041148A1 · Li et al. · 2009 [cited by applicant]
US 20090041151A1 · Khan et al. · 2009 [cited by applicant]
US 20090046678A1 · Lee et al. · 2009 [cited by applicant]
US 20090046800A1 · Xu et al. · 2009 [cited by applicant]