IP Library › Granted Patent US 12,562,763
Granted Patent B2
US 12,562,763 · App. 18/672,458 · Granted Feb 24, 2026

Power tracker for multiple transmit signals sent simultaneously

Inventor: Alexander Dorosenco (El Cajon, CA)
Assignee: QUALCOMM Incorporated
H04B1/04H03F1/0227H03F1/3205H03F3/195H03F3/211H03F3/245H03F3/68H04W52/52H03F2200/105H03F2200/294H03F2200/336H03F2200/451H03F2200/462
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Quick Facts
Patent No.
US 12,562,763
App. No.
18/672,458
Granted
Feb 24, 2026
Kind
B2
Abstract

Techniques for generating a power tracking supply voltage for a circuit (e.g., a power amplifier) are disclosed. The circuit may process multiple transmit signals being sent simultaneously on multiple carriers at different frequencies. In one exemplary design, an apparatus includes a power tracker and a power supply generator. The power tracker determines a power tracking signal based on inphase (I) and quadrature (Q) components of a plurality of transmit signals being sent simultaneously. The power supply generator generates a power supply voltage based on the power tracking signal. The apparatus may further include a power amplifier (PA) that amplifies a modulated radio frequency (RF) signal based on the power supply voltage and provides an output RF signal.

Claims (37)

1 . A user equipment (UE), comprising:

a power tracker configured to compute a power tracking signal for a plurality of transmit signals in different manners depending on one or more characteristics of the plurality of transmit signals, the plurality of transmit signals configured for simultaneous transmission from the UE to a base station on a plurality of carriers at different frequencies with carrier aggregation; and

a power supply generator configured to generate a power supply voltage based on the power tracking signal and to provide the power supply voltage to a power amplifier of the UE to produce an output radio frequency (RF) signal for the plurality of transmit signals.

2 . The UE of claim 1 , wherein the power tracker is configured to compute the power tracking signal in different manners by utilizing a first equation or a second equation depending on the one or more characteristics of the plurality of transmit signals.

3 . The UE of claim 2 , wherein the power tracker is configured to use the first equation to compute an overall power of the plurality of transmit signals.

4 . The UE of claim 3 , wherein the power tracker is configured to use the second equation to sum a voltage of each transmit signal in the plurality of transmit signals.

5 . The UE of claim 1 , wherein at least one of the different manners comprises filtering the power tracking signal.

6 . The UE of claim 1 , wherein the one or more characteristics comprises a number of transmit signals in the plurality transmit signals.

7 . The UE of claim 1 , wherein the one or more characteristics comprises transmit power of one or more transmit signals in the plurality of transmit signals.

8 . The UE of claim 1 , wherein the power supply generator is configured to receive a battery voltage.

9 . The UE of claim 8 , wherein the power supply generator comprises a power tracking amplifier configured to receive the battery voltage and a switcher configured to receive the battery voltage.

10 . The UE of claim 8 , wherein the power supply generator comprises a boost converter configured to receive the battery voltage.

11 . The UE of claim 1 , further comprising a digital-to-analog converter (DAC) configured to convert the power tracking signal from digital to an analog power tracking signal and to provide the analog power tracking signal for the plurality of transmit signals.

12 . The UE of claim 11 , further comprising a lowpass filter configured to receive the analog power tracking signal from the DAC and provide a filtered analog power tracking signal to the power supply generator.

13 . The UE of claim 1 , wherein the power tracker is configured to compute the power tracking signal based on an in-phase (I) component and a quadrature (Q) component of each of the plurality of transmit signals.

14 . The UE of claim 13 , further comprising at least one transmit circuit configured to generate a modulated RF signal based on the I component and the Q component of each of the plurality of transmit signals, and the power amplifier,

wherein the at least one transmit circuit comprises:

a first digital-to-analog converter (DAC) configured to receive the I component of a transmit signal of the plurality of transmit signals or a combination of the I components of the plurality of transmit signals,

a first lowpass filter coupled to an output of the first DAC,

a first amplifier coupled to an output of the first lowpass filter,

a first mixer coupled to an output of the first amplifier,

a second DAC configured to receive the Q component of a transmit signal of the plurality of transmit signals or a combination of the Q components of the plurality of transmit signals,

a second lowpass filter coupled to an output of the second DAC,

a second amplifier coupled to an output of the second lowpass filter, and

a second mixer coupled to an output of the second amplifier,

wherein a summer coupled to outputs of the first mixer and the second mixer is configured to provide the modulated RF signal to the power amplifier, and

wherein the power amplifier is configured to receive the power supply voltage and the modulated RF signal to produce the output RF signal.

15 . The UE of claim 1 , further comprising at least one transmit circuit, wherein the at least one transmit circuit and the power amplifier are configured to send the plurality of transmit signals utilizing polar modulation.

16 . A method performed by a user equipment (UE), the method comprising:

determining, based on one or more characteristics of a plurality of transmit signals, a manner in which to compute a power tracking signal;

computing the power tracking signal for the plurality of transmit signals based on the determined manner;

generating a power supply voltage based on the power tracking signal; and

transmitting, simultaneously to a base station, the plurality of transmit signals on a plurality of carriers at different frequencies with carrier aggregation utilizing a radio frequency (RF) signal produced based on the power supply voltage.

17 . The method of claim 16 , wherein the computing comprises utilizing a first equation or a second equation depending on the one or more characteristics of the plurality of transmit signals.

18 . The method of claim 16 , wherein the computing comprises filtering the power tracking signal.

19 . The method of claim 16 , wherein the one or more characteristics comprises a number of transmit signals in the plurality transmit signals, or wherein the one or more characteristics comprises transmit power of one or more transmit signals in the plurality of transmit signals.

20 . The method of claim 16 , wherein the generating comprises generating the power supply voltage utilizing a battery voltage.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 30, 2024
From: DOROSENCO, ALEXANDER
To: QUALCOMM INCORPORATED
Reel/Frame 067559/0992 →
Continuity (6)
Continuation 18141891 · May 1, 2023
Continuation 17486669 · Sep 27, 2021
Continuation 15916101 · Mar 8, 2018
Continuation 15444083 · Feb 27, 2017
Continuation 13764328 · Feb 11, 2013
Related Publication 20250070804A1 · Feb 27, 2025
References Cited (208)
US 5834977A · Maehara et al. · 1998 [cited by applicant]
US 5929702A · Myers et al. · 1999 [cited by applicant]
US 6009090A · Oishi et al. · 1999 [cited by applicant]
US 6028486A · Andre · 2000 [cited by applicant]
US 6181674B1 · Xin et al. · 2001 [cited by applicant]
US 6300826B1 · Mathe et al. · 2001 [cited by applicant]
US 6677819B1 · Hakala et al. · 2004 [cited by applicant]
US 7043213B2 · Robinson et al. · 2006 [cited by applicant]
US 7092683B2 · Tanaka et al. · 2006 [cited by applicant]
US 7139534B2 · Tanabe et al. · 2006 [cited by applicant]
US 7469017B2 · Granstrom et al. · 2008 [cited by applicant]
US 7706467B2 · Kenington et al. · 2010 [cited by applicant]
US 8077780B2 · Schilling et al. · 2011 [cited by applicant]
US 8457246B2 · Kim et al. · 2013 [cited by applicant]
US 8498666B2 · Sebire et al. · 2013 [cited by applicant]
US 8538353B2 · Wallace · 2013 [cited by applicant]
US 8553802B2 · Muhammad · 2013 [cited by applicant]
US 8570105B2 · Wimpenny et al. · 2013 [cited by applicant]
US 8587271B2 · Kanbe et al. · 2013 [cited by applicant]
US 8600455B1 · Zaslavsky et al. · 2013 [cited by applicant]
US 8718579B2 · Drogi · 2014 [cited by applicant]
US 8744002B2 · Maehata et al. · 2014 [cited by applicant]
US 8803603B2 · Wimpenny · 2014 [cited by applicant]
US 8810314B2 · Mulawski et al. · 2014 [cited by applicant]
US 8824978B2 · Briffa et al. · 2014 [cited by applicant]
US 8824981B2 · Langer et al. · 2014 [cited by applicant]
US 8854242B1 · Klepser et al. · 2014 [cited by applicant]
US 8879614B2 · Maehata · 2014 [cited by applicant]
US 8884697B2 · Hongo · 2014 [cited by applicant]
US 8897724B2 · Hou · 2014 [cited by applicant]
US 8942652B2 · Khlat et al. · 2015 [cited by applicant]
US 8995567B2 · Rofougaran et al. · 2015 [cited by applicant]
US 9020453B2 · Briffa et al. · 2015 [cited by applicant]
US 9071207B2 · Bai · 2015 [cited by applicant]
US 9130623B2 · Suzuki et al. · 2015 [cited by applicant]
US 9207692B2 · Khlat et al. · 2015 [cited by applicant]
US 9277501B2 · Lorenz et al. · 2016 [cited by applicant]
US 9294041B2 · Khlat et al. · 2016 [cited by applicant]
US 9432946B2 · Yamanouchi et al. · 2016 [cited by applicant]
US 9608675B2 · Dorosenco et al. · 2017 [cited by applicant]
US 11133833B2 · Dorosenco · 2021 [cited by applicant]
US 11641215B2 · Dorosenco · 2023 [cited by applicant]
US 11996872B2 · Dorosenco · 2024 [cited by examiner]
US 20040061555A1 · Lynch · 2004 [cited by applicant]
US 20050053165A1 · Lakkis · 2005 [cited by applicant]
US 20050152471A1 · Tanaka et al. · 2005 [cited by applicant]
US 20050169395A1 · Monta · 2005 [cited by applicant]
US 20050215209A1 · Tanabe et al. · 2005 [cited by applicant]
US 20060264186A1 · Akizuki et al. · 2006 [cited by applicant]
US 20080080640A1 · Rofougaran · 2008 [cited by applicant]
US 20080139140A1 · Matero et al. · 2008 [cited by applicant]
US 20090004981A1 · Eliezer et al. · 2009 [cited by applicant]
US 20090034653A1 · Rofougaran · 2009 [cited by applicant]
US 20090200996A1 · Ojanen et al. · 2009 [cited by applicant]
US 20090289720A1 · Takinami et al. · 2009 [cited by applicant]
US 20100001793A1 · Van Zeijl et al. · 2010 [cited by applicant]
US 20100165829A1 · Narasimha et al. · 2010 [cited by applicant]
US 20100233977A1 · Minnis et al. · 2010 [cited by applicant]
US 20100291963A1 · Patel et al. · 2010 [cited by applicant]
US 20110059707A1 · Kim et al. · 2011 [cited by applicant]
US 20110142156A1 · Haartsen · 2011 [cited by applicant]
US 20110148705A1 · Kenington · 2011 [cited by applicant]
US 20110151806A1 · Kenington · 2011 [cited by applicant]
US 20110193629A1 · Hou et al. · 2011 [cited by applicant]
US 20120033656A1 · De · 2012 [cited by applicant]
US 20120039418A1 · Vaisanen · 2012 [cited by applicant]
US 20120140743A1 · Pelletier et al. · 2012 [cited by applicant]
US 20120214423A1 · Wallace · 2012 [cited by applicant]
US 20120229208A1 · Wimpenny et al. · 2012 [cited by applicant]
US 20120269240A1 · Balteanu et al. · 2012 [cited by applicant]
US 20120275544A1 · Midya et al. · 2012 [cited by applicant]
US 20120293253A1 · Khlat et al. · 2012 [cited by applicant]
US 20120300824A1 · Maehata et al. · 2012 [cited by applicant]
US 20120321018A1 · Chen et al. · 2012 [cited by applicant]
US 20120326686A1 · Dai et al. · 2012 [cited by applicant]
US 20120326783A1 · Mathe et al. · 2012 [cited by applicant]
US 20120327825A1 · Gudem et al. · 2012 [cited by applicant]
US 20130034186A1 · Oga · 2013 [cited by applicant]
US 20130049858A1 · Wimpenny · 2013 [cited by applicant]
US 20130187711A1 · Goedken et al. · 2013 [cited by applicant]
US 20140111275A1 · Khlat et al. · 2014 [cited by applicant]
US 20140126440A1 · Frank et al. · 2014 [cited by applicant]
US 20140135050A1 · Goedken et al. · 2014 [cited by applicant]
US 20140199949A1 · Nagode · 2014 [cited by examiner]
US 20140226748A1 · Dorosenco et al. · 2014 [cited by applicant]
US 20170170851A1 · Dorosenco · 2017 [cited by applicant]
US 20220014216A1 · Dorosenco · 2022 [cited by applicant]
US 20230268940A1 · Dorosenco · 2023 [cited by applicant]
CN 101867284B · 2012 [cited by applicant]
EP 2222044A1 · 2010 [cited by applicant]
EP 2226932A1 · 2010 [cited by applicant]
EP 2442440A1 · 2012 [cited by applicant]
EP 2482509A1 · 2012 [cited by applicant]
EP 2915250B1 · 2017 [cited by applicant]
GB 2476393A · 2011 [cited by applicant]
JP 2010512705A · 2010 [cited by applicant]
JP 2011018994A · 2011 [cited by applicant]
JP 2012165261A · 2012 [cited by applicant]
WO 0008774A1 · 2000 [cited by applicant]
WO 03081793A1 · 2003 [cited by applicant]
WO 2009153138A1 · 2009 [cited by applicant]
WO 2012110409A1 · 2012 [cited by applicant]
WO 2012157418A1 · 2012 [cited by applicant]
WO 2012175709A1 · 2012 [cited by applicant]
WO 2012178138 · 2012 [cited by applicant]
WO 2014070474A1 · 2014 [cited by applicant]
WO 2014123744 · 2014 [cited by applicant]
337-TA-1065 Order No. 28 Construing the Terms of the Asserted Patents Mar. 5, 2018, 40 pages. [cited by applicant]
3GPP, “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Physical Channels and Modulation (Release 8),” 3GPP Draft; 36.211 V0.1.2, 3rd Generation Partnership Project (3GPP), Mobile … [cited by applicant]
“3GPP TS 25.104, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Base Station (BS) radio transmission and reception (FDD),” V9.1.0, Release 9, Sep. 2009, 7 pages. [cited by applicant]
“3GPP TS 36.101, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception,” V11.2.… [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Further Advancements for E-UTRA; LTE-Advanced Feasibility Studies in RAN WG4 (Release 9)”, 3GPP Standard; 3GPP TR 36.815 , 3rd Gen… [cited by applicant]
Aitto-Oja T., “High Efficiency Envelope Tracking Supply Voltage Modulator for High Power Base Station Amplifier Applications”, Konferenzband Microwave Symposium Digest (MTT) 2010 IEEE MTT-S, May 23-28, 2010, pp. 668-671. [cited by applicant]
Akbarpour M., et al., “A Transformer-Less Load-Modulated (TLLM) Architecture for Efficient Wideband Power Amplifiers,” IEEE Transactions on Microwave Theory and Techniques, Sep. 2012, vol. 60, No. 9, pp. 2863-2874. [cited by applicant]
Anritsu., “Understanding LTE-Advanced,” Carrier Aggregation, pp. 1-71. [cited by applicant]
Appliation Notes for RF Microwave—Technical Documents—TI.com, Nov. 19, 2017, 2 pages. [cited by applicant]
Bassam S.A., et al., “2-D Digital Predistortion (2-D-DPD) Architecture for Concurrent Dual-Band Transmitters,” IEEE Transactions on Microwave Theory and Techniques, Oct. 2011, vol. 59, No. 10, pp. 2547-2553. [cited by applicant]
Bassam S.A., et al., “Linearization of Concurrent Dual-Band Power Amplifier Based on 2D-DPD Technique,” IEEE Microwave and Wireless Components Letters, vol. 21, No. 12, Dec. 2011, pp. 685-687. [cited by applicant]
Bassam S.A., et al., “Subsampling Feedback Loop Applicable to Concurrent Dual-Band Linearization Architecture,” IEEE Transactions on Microwave Theory and Techniques, vol. 60, No. 6, Jun. 2012, pp. 1990-1999. [cited by applicant]
Besprozvanny A., et al., “Highly Efficient Transmitter for High Peak to Average Power Ratio(PAPR) Waveforms”, Technical Report 20110121351, Space and Naval Warfare Systems Center, San Diego, CA, Jan. 19, 2011, 50 pages,… [cited by applicant]
Blanken B.G., et al., “A 50MHz Bandwidth Multi-Mode PA Supply Modulator for GSM, EDGE and UMTS Application,” IEEE Radio Frequency Integrated Circuits Symposium, Apr. 2008, pp. 401-404. [cited by applicant]
Bragg M., et al., “Advanced Wayback Machine Navigation and Troubleshooting,” 2009, 3 pages. [cited by applicant]
Brief of Appellant Qualcomm Incorporated, U.S. Court of Appeals for the Federal Circuit, Nos. 2020-1589, 2020-1590, 2020-1591, 2020-1592, 2020-1593, 2020-1594, filed Jul. 6, 2020, 58 pages. [cited by applicant]
Chan K., “GC5325 Envelope Tracking”, Texas Instruments Application Report, SLWA058B, Apr. 2010, 14 pages, Ausdruck von http://www.ti.com/analog/docs/analogtechdoc_hh.tsp?viewType=mostuseful&rootFamilyId=367familyId=… [cited by applicant]
Chan K., “GC5325 Envelope Tracking”, Texas Instruments Application Report, SLWA058, Jan. 2010, 16 pages, Website https://web.archive.org/web/20120612151643/ http://www.eetindia.co.in/STATIC/PDF/201003/EEIOL_2010MAR18_RF… [cited by applicant]
Chan K., “GC5325 Envelope Tracking”, Texas Instruments Application Report, SLWA058B, Jan. 2010—Revised Apr. 2010, 12 pages. [cited by applicant]
Chen W., et al., “Hybrid Envelope Tracking for Efficiency Enhancement in Concurrent Dual-Band PAs”, Microwave and Optical Technology Letters, vol. 54, No. 3, Mar. 2012, pp. 662-664 (Online Version). [cited by applicant]
Chen W., et al., “Hybrid Envelope Tracking for Efficiency Enhancement in Concurrent Dual-Band PAs”, Microwave and Optical Technology Letters, vol. 54, No. 3, Mar. 2012, pp. 662-664 (Print Version). [cited by applicant]
Choi J., “A Study on Polar Modulated Power Transmitters for Wireless Communication,” Thesis, Nov. 30, 2009, 159 pages. [cited by applicant]
Choi J., et al., “A New Power Management IC Architecture for Envelope Tracking Power Amplifier,” IEEE Transactions on Microwave Theory and Techniques, vol. 59, No. 7, Jul. 2011, pp. 1796-1802. [cited by applicant]
Choi, J et al., “A Polar Transmitter With CMOS Programmable Hysteretic-Controlled Hybrid Switching Supply Modulator for Multi standard Applications”, IEEE Transactions on Microwave Theory and Techniques, IEEE Service Ce… [cited by applicant]
Choi J., et al., “Envelope Tracking Power Amplifier Robust to Battery Depletion,” 2010 IEEE MTT-S International Microwave Symposium Digest (MTT), May 2010, pp. 1074-1077. [cited by applicant]
Chu W-Y., et al., “A 10 MHz Bandwidth, 2 mV Ripple PA Regulator for CDMA Transmitters,” IEEE Journal of Solid-State Circuits, Dec. 2008, vol. 43, No. 12, pp. 2809-2819. [cited by applicant]
Cisco Systems, et al., “Internetworking Technologies Handbook,” Fourth Edition, Cisco Press, 2004, pp. 289-334. [cited by applicant]
Complainant Qualcomm Incorporated's Initial Claim Construction Brief, In the Matter of Certain Mobile Electronic Devices and Radio Frequency and Processing Components Thereof, Investigation No. 337-TA-1065, Dec. 4, 2017… [cited by applicant]
Cox C., “An Introduction to LTE LTE: LTE-Advanced, SAE and 4G Mobile Communications,” 2012, 18 pages. [cited by applicant]
Dahlman E., et al., “4G LTE/LTE-Advanced for Mobile Broadband,” Amsterdam, Elsevier Academic Press, 2011, 23 pages. [cited by applicant]
Decision of Technical Board of Appeal of the European Patent Office Setting Aside the Decision of the Opposition Division Revoking the European Patent EP2954737, dated Apr. 13, 2021, 10 pages. [cited by applicant]
Desquiotz R., “Vector Signal Generator R&S SMU 200A”, Retrieved from the Internet: https://cdn.rohde-schwarz.com/pws/dl_downloads/dl_common_library/dl_news_from_rs/185/n185_smu200a.pdf Mar. 31, 2005 (Mar. 31, 2005);… [cited by applicant]
Ertl H., et al., “Basic Considerations and Topologies of Switched-Mode Assisted Linear Power Amplifiers,” IEEE Transactions on Industrial Electronics, Feb. 1997, vol. 44, No. 1, pp. 116-123. [cited by applicant]
European Patent Office Decision Revoking the European Patent EP2954737, mailed on Jun. 7, 2019, 2 pages. [cited by applicant]
European Patent Office Notice of Opposition, EP2954737, Apple Inc., Jan. 11, 2018, 1 page. [cited by applicant]
European Patent Office Notice of Opposition, EP2954737, Intel Inc., Jan. 11, 2018, 1 page. [cited by applicant]
European Search Report—EP17163460—Search Authority—The Hague—May 11, 2017. [cited by applicant]
Final Written Decision of the Patent Trial and Appeal Board in IPR2018-01326 Determining All Challenged Claims of U.S. Pat. No. 9,608,675 Unpatentable, dated Jan. 14, 2020, 65 pages. [cited by applicant]
Final Written Decision of the Patent Trial and Appeal Board in IPR2018-01327 Determining All Challenged Claims of U.S. Pat. No. 9,608,675 Unpatentable, dated Jan. 14, 2020, 82 pages. [cited by applicant]
Final Written Decision of the Patent Trial and Appeal Board in IPR2018-01328 Determining All Challenged Claims of U.S. Pat. No. 9,608,675 Unpatentable, dated Jan. 14, 2020, 81 pages. [cited by applicant]
Final Written Decision of the Patent Trial and Appeal Board in IPR2018-01329 Determining All Challenged Claims of U.S. Pat. No. 9,608,675 Unpatentable, dated Jan. 14, 2020, 83 pages. [cited by applicant]
Final Written Decision of the Patent Trial and Appeal Board in IPR2018-01330 Determining All Challenged Claims of U.S. Pat. No. 9,608,675 Unpatentable, dated Jan. 14, 2020, 86 pages. [cited by applicant]
Final Written Decision of the Patent Trial and Appeal Board in IPR2018-01340 Determining All Challenged Claims of U.S. Pat. No. 9,608,675 Unpatentable, dated Jan. 14, 2020, 88 pages. [cited by applicant]
Ghannouchi F.M., et al., “Accurate Power Efficiency Estimation of GHz Wireless Delta-Sigma Transmitters for Different Classes of Switching Mode Power Amplifiers,” IEEE Transactions on Microwave Theory and Techniques, vo… [cited by applicant]
Hanzo L., et al., “Quadrature Amplitude Modulation,” From Basics to Adaptive Trellis-Coded, Turbo-Equalised and Space-Time Coded OFDM, CDMA and MC-CDMA Systems, Second Edition, Chapter 1, Introduction and Background, No… [cited by applicant]
Hanzo L., et al., “Quadrature Amplitude Modulation,” From Basics to Adaptive Trellis-Coded, Turbo-Equalised and Space-Time Coded OFDM, CDMA and MC-CDMA Systems, Second Edition, Chapter 15, Introduction to Orthogonal Fre… [cited by applicant]
Hanzo L., et al., “Quadrature Amplitude Modulation,” From Basics to Adaptive Trellis-Coded, Turbo-Equalised and Space-Time Coded OFDM, CDMA and MC-CDMA Systems, Second Edition, Chapter 4, Basic QAM Techniques, Nov. 2004… [cited by applicant]
Hanzo L., et al., “Quadrature Amplitude Modulation,” From Basics to Adaptive Trellis-Coded, Turbo-Equalised and Space-Time Coded OFDM, CDMA and MC-CDMA Systems, Second Edition, Chapter 5, Square QAM, Nov. 2004, pp. 133-… [cited by applicant]
Hanzo L., et al., “Quadrature Amplitude Modulation,” From Basics to Adaptive Trellis-Coded, Turbo-Equalised and Space-Time Coded OFDM, CDMA and MC-CDMA Systems, Second Edition, Contents, Nov. 2004, 26 pages. [cited by applicant]
International Preliminary Report on Patentability—PCT/US2014/013805, The International Bureau of WIPO—Geneva, Switzerland, Aug. 20, 2015. [cited by applicant]
Appeals from the United States Patent and Trademark Office, Patent Trial and Appeal Board in Nos. IPR2018-01326, IPR2018-01327, IPR2018-01328, IPR2018-01329, IPR2018-01330, IPR2018-01340, Case 22-1824, Document 54, File… [cited by applicant]
Decision of Technical Board of Appeal of the European Patent Office Setting Aside the Interlocutory decision of the Opposition Division of the European Patent No. EP2954737 dated Jan. 23, 2024, 13 pages. [cited by applicant]
Final Written Decision on Remand of the Patent Trial and Appeal Board in IPR2018-01326, IPR2018-01327, IPR2018-01329, IPR2018-01340 Determining All Challenged Claims of U.S. Pat. No. 9,608,675 Unpatentable, dated Mar. 2… [cited by applicant]
Final Written Decision on Remand of the Patent Trial and Appeal Board in IPR2018-01328, IPR2018-01330 Determining All Challenged Claims of U.S. Pat. No. 9,608,675 Unpatentable, dated Mar. 23, 2022, 50 pages. [cited by applicant]
Transmittal of decision, summons, opposition of the European U.S. Appl. No. 14/704,496 dated Jun. 13, 2022, 79 Pages. [cited by applicant]
International Search Report and Written Opinion—PCT/US2014/013805—ISAEPO—Mar. 20, 2014. [cited by applicant]
Jebali C., et al., “Effects of Signal PDF on the Identification of Behavioral Polynomial Models for Multicarrier RF Power Amplifiers,” Analog Integrated Circuits and Signal Processing, vol. 73, No. 1, Oct. 2012, pp. 217… [cited by applicant]
Jeong J., et al., “Wideband Envelope Tracking Power Amplifiers with Reduced Bandwidth Power Supply Waveforms and Adaptive Digital Predistortion Techniques”, IEEE Transactions on Microwave Theory and Techniques, IEEE Ser… [cited by applicant]
Kalivas G., “Digital Radio System Design,” Dec. 11, 2009, pp. 208-209. [cited by applicant]
Kammeyer K-D., “Telecommunications,” 3rd Edition, Nov. 2004, pp. 1-26. [cited by applicant]
Kang D., et al., “A Multimode/Multiband Power Amplifier With a Boosted Supply Modulator”, IEEE Transactions on Microwave Theory and Techniques, IEEE Service Center, Piscataway, Nj, US, vol. 58, No. 10, Oct. 1, 2010, pp.… [cited by applicant]
Kang D., et al., “LTE Power Amplifier for Envelope Tracking Polar Transmitters”, Proceedings of the 40th European Microwave Conference, IEEE, Piscataway, NJ, USA, Sep. 28-30, 2010, pp. 628-631, XP031786114. [cited by applicant]
Kim D., et al., “Optimization for Envelope Shaped Operation of Envelope Tracking Power Amplifier,” IEEE Transactions on Microwave Theory and Techniques, Jul. 2011, vol. 59, No. 7, pp. 1787-1795. [cited by applicant]
Kudeki E., et al., “Analog Signal Processing,” Prentice Hall, Jan. 2007, 18 pages. [cited by applicant]
Leibniz Information Center for Science and Technology University Library, Dec. 11, 2017, 1 page. [cited by applicant]
Li Y., et al., “High Efficiency Wide Bandwidth Power Supplies for GSM and Edge RF Power Amplifiers”, Conference Proceedings/IEEE International Symposium on Circuits and Systems (ISCAS): May 23-26, 2005, International Co… [cited by applicant]
Liu Y-J., et al., “Digital Predistortion for Concurrent Dual-Band Transmitters Using 2-D Modified Memory Polynomials,” IEEE Transactions on Microwave Theory and Techniques, vol. 61, No. 1, Jan. 2013, pp. 281-290. [cited by applicant]
Lyons R.G., “Understanding Digital Signal Processing”, Prentice-Hall, 8. Nachdruck vom Apr. 2001, Titelseiten, Inhaltsverzeichnis, pp. 458-475. [cited by applicant]
Mannheim Court for Patent Matters Case No. 7-O-127/17 for EP2954737 dated Jul. 17, 2017, 31 pages. [cited by applicant]
Maxim., “16VP-P Class G Amplifier with Inverting Boost Converter,” MAX9738, Maxim Integrated Products, Inc., Datasheet 19-3700, Rev. 0, Mar. 2008, pp. 1-14. [cited by applicant]
Nguyen T-K., et al., “A Low-Power, Wide-Range Variable Gain Cmos Rf Transmitter for 900 MHz Wireless Communications,” Analog Integrated Circuits and Signal Processing, 2010, vol. 63, pp. 177-183. [cited by applicant]
Nuszkowski H., “Digital Signal Transmission, Fundamentals of Digital Transmission Systems,” 2nd Edition, 2009, pp. 63-73. [cited by applicant]
Ochiai H., et al., “On the Distribution of the Peak-to-Average Power Ratio in OFDM Signals”, IEEE Transactions on Communications, vol. 49, No. 2, Feb. 2001, pp. 282-289. [cited by applicant]
Order No 28: Construing Terms of the Asserted Patents, In the Matter of Certain Mobile Electronic Devices and Radio Frequency and Processing Components Thereof, Investigation No. 337-TA-1065, Mar. 5, 2018, 40 pages. [cited by applicant]
Podsiadlik T., et al., “Design of Signal Modulator for RF Polar Transmitter”, Radio and Wireless Symposium (RWS), 2012 IEEE, IEEE, Jan. 15, 2012 (Jan. 15, 2012), pp. 439-442, XP032153361, DOI: 10.1109/RWS.2012.6175314, … [cited by applicant]
[cited by applicant]
[cited by applicant]
Rawat K., et al., “Design Methodology for Dual-Band Doherty Power Amplifier With Performance Enhancement Using Dual-Band Offset Lines,” IEEE Transactions on Industrial Electronics, Dec. 2012, vol. 59, No. 12, pp. 4831-4… [cited by applicant]
Rawat K., et al., “Dual-Band Branch-Line Hybrid with Distinct Power Division Ratio Over the Two Bands,” International Journal of RF and Microwave Computer-Aided Engineering Banner, vol. 23, No. 1, Jan. 2013, pp. 90-98. [cited by applicant]
Rawat K., et al., “Dual-Band RF Circuits and Components for Multi-Standard Software Defined Radios,” IEEE Circuits and Systems Magazine, vol. 12, No. 1, Feb. 21, 2012, pp. 12-32. [cited by applicant]
Rawat M., et al., “Joint Mitigation of Nonlinearity and Modulator Imperfections in Dual-Band Concurrent Transmitter using Neural Networks,” Electronics Letters, vol. 49, No. 4, Feb. 14, 2013, 2 pages. [cited by applicant]
Rawat M., et al., “Recent Advances on Signal Processing Solutions for Distortion Mitigation Due to Power Amplifier and Non-Ideality of Transmitter System,” Recent Patents on Signal Processing, vol. 1, 2011, pp. 135-142. [cited by applicant]
Razavai B., “Introduction to Data Conversion and Processing,” in: Principles of Data Conversion System Design, IEEE, Inc, Newyork, Wiley-Interscience, 1995, pp. 1-6. [cited by applicant]
Reply Brief of Appellant Qualcomm Incorporated, U.S. Court of Appeals for the Federal Circuit, Nos. 2020-1589, 2020-1590, 2020-1591, 2020-1592, 2020-1593, 2020-1594, filed Jul. 6, 2020, 38 pages. [cited by applicant]
Report on the Filing or Determination of An Action Regarding A Patent or Trademark 3: 17cv01375, 2017, 1 page. [cited by applicant]
Sauter M., “From GSM to LTE: An Introduction to Mobile Networks and Mobile Broadband,” John Wiley & Sons, 2011, 452 pages. [cited by applicant]
Sklar B., “Digital Communications, Fundamentals and Applications ,” Second Edition, 2001, pp. 204-209. [cited by applicant]
Stauth J.T., et al., “Energy Efficient Wireless Transmitters: Polar and Direct-Digital Modulation Architectures,” Electrical Engineering and Computer Sciences, University of California at Berkeley, Feb. 4, 2009, 199 pag… [cited by applicant]
Stauth, J.T., et al., “Optimum Bias Calculation for Parallel Hybrid Switching-Linear Regulators”, 22nd Annual IEEE Applied Power Electronics Conference and Exposition, Feb. 25-Mar. 1, 2007, pp. 569-574, XP031085267. [cited by applicant]
Texas Instruments, “TSW3100 High Speed Digital Pattern Generator,” User's Guide, SLLU101A, Nov. 2007, revised Jan. 2008, pp. 1-44. [cited by applicant]
Wang F., et al., “A Monolithic High-Efficiency 2.4-GHz 20-dBm SiGe BiCMOS Envelope-Tracking OFDM Power Amplifier,” IEEE Journal of Solid-State Circuits, Jun. 2007, vol. 42, No. 6, pp. 1271-1281. [cited by applicant]
Wang F., et al., “Design of Wide-Bandwidth Envelope-Tracking Power Amplifiers for OFDM Applications”, IEEE Transactions on Microwave Theory and Techniques, vol. 53, No. 4, Apr. 2005, pp. 1244-1255. [cited by applicant]
Weinstein S.B., et al., “Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform,” IEEE Transactions on Communication Technology, vol. Com-19, No. 5, Oct. 1971, pp. 628-634. [cited by applicant]
Wikipedia, “Fourier-Transformation”, Mar. 8, 2022, 13 Pages, https://de.wikipedia.org/wiki/Fourier-Transformation. [cited by applicant]
Wikipedia, “Mittelwert”, Mar. 10, 2022, 14 Pages, https://de.wikipedia.org/wiki/Mittelwert. [cited by applicant]
Wikipedia, “Quadratisches Mittel”, Mar. 10, 2022, 2 Pages, https://de.wikipedia.org/wiki/Quadratisches_Mittel. [cited by applicant]
Wikipedia, “Root Mean Square”, Mar. 10, 2022, 9 Pages, https://en.wikipedia.org/wiki/Root_mean_square. [cited by applicant]
Younes M., et al., “An Accurate Predistorter Based on a Feedforward Hammerstein Structure,” IEEE Transactions on Broadcasting, Sep. 2012, vol. 58, No. 3, pp. 454-461. [cited by applicant]
Yu X., “Contributions to Digital Predistortion of Radio-Frequency Power Amplifiers for Wireless Applications,” 2012, 144 pages. [cited by applicant]
Zellmer J., “Understanding HSPA+ Cellular Technology,” Electronic Design, Jun. 6, 2012, pp. 1-15, URL: https://www.electronicdesign.com/communications/understandinghspa-cellular-technology. [cited by applicant]
Zhu Q., et al., “A Digital Polar Transmitter with DC-DC Converter Supporting 256-QAM WLAN and 40 MHz LTE-A Carrier Aggregation,” IEEE Radio Frequency Integrated Circuits Symposium, 2016, pp. 198-201. [cited by applicant]