IP Library › Granted Patent US 12,323,347
Granted Patent B2
US 12,323,347 · App. 18/216,955 · Granted Jun 3, 2025

Identification of packet traffic transmitted by various devices operated in multiple overlapped frequency bands in packet-based OFDM systems

Inventor: Joon Bae Kim (Lexington, MA)
Assignee: APPLIED TRANSFORM, LLC
H04L5/0044H04L1/0042H04L1/0056H04L1/0072H04L1/04H04L1/08H04L5/0007H04L5/0037H04L5/0053H04L5/0091H04L27/2602H04L45/74H04L69/22H04W72/04H04W72/0446H04W72/0453H04L27/26025H04W84/12
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Quick Facts
Patent No.
US 12,323,347
App. No.
18/216,955
Granted
Jun 3, 2025
Kind
B2
Abstract

Techniques for header encoding include encoding a plurality of bits using a forward error correction code, generating an FEC codeword comprising a plurality of encoded bits, and concatenating a first copy of the FEC codeword with a second copy of the FEC codeword, wherein the concatenating comprises cyclically shifting by two bits the second concatenated copy of the FEC codeword relative to the first concatenated copy of the FEC codeword, wherein the encoded bits of the first and second copies of the FEC codewords are modulated on at least one OFDM symbol. techniques for header decoding include receiving a plurality of encoded bits comprising at least two concatenated copies of an FEC codeword, decoding a first copy of the FEC codeword to generate a first plurality of decoded bits, and decoding a second copy of the FEC codeword to generate a second plurality of decoded bits.

Claims (8)

1. A wireless Orthogonal Frequency Division Multiplexing (OFDM) transceiver comprising: a transmitter portion, that cooperates with a controller and memory, capable of generating a packet comprising a preamble portion and a header portion wherein a sub-carrier spacing of a section of the preamble portion is greater than the sub-carrier spacing of the header portion; the transmitter portion further of capable of encoding a plurality of bits using a Forward Error Correction (FEC) encoder to generate a FEC codeword comprising a plurality of encoded bits; and the transmitter portion further capable of concatenating a first copy of the FEC codeword with a second copy of the FEC codeword, wherein the concatenating comprises cyclically shifting by two bits the second concatenated copy of the FEC codeword relative to the first concatenated copy of the FEC codeword.

2. The wireless OFDM transmitter of claim 1 , further capable of modulating the encoded bits of the first and second copies of the FEC codewords on at least one OFDM symbol.

3. The method of claim 1 , further comprising modulating the encoded bits of the first and second copies of the FEC codewords on at least one OFDM symbol.

4. A method, in a wireless Orthogonal Frequency Division Multiplexing (OFDM) transmitter, the method comprising: generating a packet comprising a preamble portion and a header portion, wherein a sub-carrier spacing of a section of the preamble portion is greater than the sub-carrier spacing of the header portion; encoding a plurality of bits using a Forward Error Correction (FEC) encoder to generate a FEC codeword comprising a plurality of encoded bits; and concatenating a first copy of the FEC codeword with a second copy of the FEC codeword, wherein the concatenating comprises cyclically shifting by two bits the second concatenated copy of the FEC codeword relative to the first concatenated copy of the FEC codeword.

5. A non-transitory computer-readable information storage media having stored thereon instructions, that when executed by one or more processors, cause to be performed a method, in a wireless Orthogonal Frequency Division Multiplexing (OFDM) transceiver, the method comprising:

generating a packet comprising a preamble portion and a header portion, wherein a sub-carrier spacing of a section of the preamble portion is greater than the sub-carrier spacing of the header portion;

encoding a plurality of bits using a Forward Error Correction (FEC) encoder to generate a FEC codeword comprising a plurality of encoded bits; and concatenating a first copy of the FEC codeword with a second copy of the FEC codeword, wherein the concatenating comprises cyclically shifting by two bits the second concatenated copy of the FEC codeword relative to the first concatenated copy of the FEC codeword.

6. The media of claim 5 , further comprising modulating the encoded bits of the first and second copies of the FEC codewords on at least one OFDM symbol.

Continuity (10)
Continuation 17337883 · Jun 3, 2021
Continuation 16849358 · Apr 15, 2020
Continuation 16145971 · Sep 28, 2018
Continuation 15468903 · Mar 24, 2017
Continuation 15148216 · May 6, 2016
Continuation 12783903 · May 20, 2010
Continuation 12743876
Provisional Application 61091621 · Aug 25, 2008
Provisional Application 61196068 · Oct 14, 2008
Related Publication 20230344573A1 · Oct 26, 2023
References Cited (107)
US 5144304A · McMahon · 1992 [cited by applicant]
US 5491719A · Sellin et al. · 1996 [cited by applicant]
US 6499128B1 · Gerlach et al. · 2002 [cited by applicant]
US 6865164B1 · Scribano et al. · 2005 [cited by applicant]
US 6928602B2 · Yamagishi et al. · 2005 [cited by applicant]
US 6987754B2 · Shahar et al. · 2006 [cited by applicant]
US 7298692B2 · Hiramatsu et al. · 2007 [cited by applicant]
US 7339882B2 · Schaefer et al. · 2008 [cited by applicant]
US 7522514B2 · Tzannes et al. · 2009 [cited by applicant]
US 7542504B2 · Chang et al. · 2009 [cited by applicant]
US 7570696B2 · Maltsev et al. · 2009 [cited by applicant]
US 7860128B2 · Niu et al. · 2010 [cited by applicant]
US 8537796B2 · Kim · 2013 [cited by applicant]
US 9363121B2 · Kim · 2016 [cited by applicant]
US 9596327B2 · Kim · 2017 [cited by applicant]
US 9602637B2 · Kim · 2017 [cited by applicant]
US 9609091B2 · Kim · 2017 [cited by applicant]
US 9609092B2 · Kim · 2017 [cited by applicant]
US 10091337B2 · Kim · 2018 [cited by applicant]
US 10637971B2 · Kim · 2020 [cited by applicant]
US 11032401B2 · Kim · 2021 [cited by applicant]
US 11736247B2 · Kim · 2023 [cited by examiner]
US 20020001315A1 · Tran et al. · 2002 [cited by applicant]
US 20020142780A1 · Airy et al. · 2002 [cited by applicant]
US 20030021296A1 · Wee et al. · 2003 [cited by applicant]
US 20040063438A1 · Hsu et al. · 2004 [cited by applicant]
US 20040243913A1 · Budge · 2004 [cited by examiner]
US 20050129018A1 · Casaccia et al. · 2005 [cited by applicant]
US 20050221784A1 · Gomez et al. · 2005 [cited by applicant]
US 20050233752A1 · Larola et al. · 2005 [cited by applicant]
US 20060007898A1 · Maltsev et al. · 2006 [cited by applicant]
US 20060253765A1 · Boer et al. · 2006 [cited by applicant]
US 20070076811A1 · Aldana et al. · 2007 [cited by applicant]
US 20070082692A1 · Tirkkonen et al. · 2007 [cited by applicant]
US 20070091837A1 · Li et al. · 2007 [cited by applicant]
US 20070110197A1 · Bagchi et al. · 2007 [cited by applicant]
US 20070211786A1 · Shattil · 2007 [cited by applicant]
US 20080117996A1 · Kim et al. · 2008 [cited by applicant]
US 20090067402A1 · Forenza et al. · 2009 [cited by applicant]
US 20090196163A1 · Du · 2009 [cited by applicant]
US 20090257396A1 · Eliezer et al. · 2009 [cited by applicant]
US 20090268782A1 · Wang · 2009 [cited by examiner]
US 20210289061A1 · Kim · 2021 [cited by applicant]
CN 1463563 · 2003 [cited by applicant]
CN 1500333 · 2004 [cited by applicant]
CN 1723647 · 2006 [cited by applicant]
CN 1957546 · 2007 [cited by applicant]
CN 101136894 · 2008 [cited by applicant]
EP 1202515 · 2002 [cited by applicant]
EP 1298948 · 2003 [cited by applicant]
WO WO2002078280 · 2002 [cited by applicant]
WO WO2005039186 · 2005 [cited by applicant]
WO WO2007063514 · 2007 [cited by applicant]
WO WO2008118429 · 2008 [cited by applicant]
CCSDS: The Consultative Committee for Space Data Systems, “Research and Development for Space Data System Standards, DVB-S2 Coding & Modulation Standard Use for High Data Rate TM Links,” Experimental Specification, CCSD… [cited by applicant]
IEEE Standard 802.11™M-2007, “Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications,” IEEE Computer Society, Jun. 2007, 1233 pages. [cited by applicant]
IEEE Standard 802.16™-2004, “Part 16: Air Interface for Fixed Broadband Wireless Access Systems,” IEEE Computer Society and the IEEE Microwave Theory and Techniques Society, Oct. 2004, 895 pages. [cited by applicant]
Zhu et al., “Carrier Frequency Offset Estimation of OFDM Systems with Null Subcarriers” IEEE Transactions on Vehicular Technology, vol. 55, No. 5, pp. 1677-1690, Sep. 2006. [cited by applicant]
Invitation to Pay Additional Fees and, Where Applicable, Protest Fee for International (PCT) Application No. PCT/US2009/054915, mailed Sep. 9, 2010. [cited by applicant]
International Search Report for International (PCT) Patent Application No. PCT/US2009/054915, mailed Feb. 25, 2011. [cited by applicant]
Written Opinion for International (PCT) Patent Application No. PCT/US2009/054915, mailed Feb. 25, 2011. [cited by applicant]
International Preliminary Report on Patentability for International (PCT) Patent Application No. PCT/US2009/054915, mailed Mar. 31, 2011. [cited by applicant]
Official Action for Chinese Patent Application No. 200980142473.2, mailed Jun. 3, 2013. [cited by applicant]
Official Action (including translation) for Chinese Patent Application No. 200980142473.2, mailed Mar. 14, 2014. [cited by applicant]
Official Action (including translation) for Chinese Patent Application No. 200980142473.2, mailed Sep. 24, 2014. [cited by applicant]
Decision of Rejection (including translation) for Chinese Patent Application No. 200980142473.2, mailed Jun. 10, 2015. [cited by applicant]
Notification to Grant the Patent Right for Invention (including translation) for Chinese Patent Application No. 200980142473.2, mailed Feb. 16, 2016. [cited by applicant]
Official Action (including translation) for Chinese Patent Application No. 201610282329.0, mailed Jul. 25, 2018. [cited by applicant]
Official Action (including translation) for Chinese Patent Application No. 201610282329.0, mailed Mar. 7, 2019. [cited by applicant]
Official Action (including translation) for Chinese Patent Application No. 201610282329.0, mailed Dec. 6, 2019. [cited by applicant]
Office Action for European Patent Application No. 09791896.5, mailed Feb. 13, 2012. [cited by applicant]
Office Action for European Patent Application No. 09791896.5, mailed Oct. 25, 2012. [cited by applicant]
Communication Under Rule 71(3) EPC—Intention to Grant for European Patent Application No. 09791896.5, mailed Jul. 23, 2013. [cited by applicant]
Decision to Grant a European Patent Pursuant to Article 97(1) EPC for European Patent Application No. 09791896.5, mailed Dec. 19, 2013. [cited by applicant]
European Search Report for European Application No. 14000108.2, mailed Mar. 6, 2014. [cited by applicant]
Communication Pursuant to Rule 69 EPC for European Application No. 14000108.2, mailed Apr. 23, 2014. [cited by applicant]
Office Action for European Application No. 14000108.2, mailed May 10, 2016. [cited by applicant]
Office Action for European Application No. 14000108.2, mailed Mar. 28, 2017. [cited by applicant]
Intent to Grant for European Application No. 14000108.2, mailed Mar. 5, 2018. [cited by applicant]
Office Action for U.S. Appl. No. 12/743,876, mailed Oct. 9, 2012. [cited by applicant]
Office Action for U.S. Appl. No. 12/743,876, mailed Apr. 18, 2013. [cited by applicant]
Notice of Allowance for U.S. Appl. No. 12/743,876, mailed Jun. 14, 2013. [cited by applicant]
Office Action for U.S. Appl. No. 12/783,903, mailed Jul. 23, 2012. [cited by applicant]
Office Action for U.S. Appl. No. 12/783,903, mailed Feb. 22, 2013. [cited by applicant]
Office Action for U.S. Appl. No. 12/783,903, mailed Apr. 23, 2014. [cited by applicant]
Office Action for U.S. Appl. No. 12/783,903 mailed Dec. 4, 2014. [cited by applicant]
Office Action for U.S. Appl. No. 12/783,903 mailed Aug. 26, 2015. [cited by applicant]
Notice of Allowance for U.S. Appl. No. 12/783,903 mailed Apr. 13, 2016. [cited by applicant]
Office Action for U.S. Appl. No. 15/148,141 mailed Sep. 8, 2016. [cited by applicant]
Notice of Allowance for U.S. Appl. No. 15/148,141 mailed Jan. 12, 2017. [cited by applicant]
Office Action for U.S. Appl. No. 15/148,164 mailed Sep. 15, 2016. [cited by applicant]
Notice of Allowance for U.S. Appl. No. 15/148,164 mailed Feb. 8, 2017. [cited by applicant]
Office Action for U.S. Appl. No. 15/148,186 mailed Sep. 9, 2016. [cited by applicant]
Notice of Allowance for U.S. Appl. No. 15/148,186 mailed Jan. 20, 2017. [cited by applicant]
Office Action for U.S. Appl. No. 15/148,216 mailed Sep. 23, 2016. [cited by applicant]
Notice of Allowance for U.S. Appl. No. 15/148,216 mailed Feb. 14, 2017. [cited by applicant]
Office Action for U.S. Appl. No. 15/468,903, mailed Jul. 24, 2017. [cited by applicant]
Office Action for U.S. Appl. No. 15/468,903, mailed Feb. 5, 2018. [cited by applicant]
Notice of Allowance for U.S. Appl. No. 15/468,903, mailed May 16, 2018. [cited by applicant]
Office Action for U.S. Appl. No. 16/145,971 mailed Sep. 5, 2019. [cited by applicant]
Notice of Allowance for U.S. Appl. No. 16/145,971 mailed Dec. 26, 2019. [cited by applicant]
Office Action for U.S. Appl. No. 16/849,358 mailed Sep. 21, 2020. [cited by applicant]
Office Action for U.S. Appl. No. 16/849,358 mailed Jan. 26, 2021. [cited by applicant]
Notice of Allowance for U.S. Appl. No. 16/849,358 mailed Feb. 11, 2021. [cited by applicant]
Office Action for U.S. Appl. No. 17/337,883, mailed Sep. 20, 2022. [cited by applicant]
Office Action for U.S. Appl. No. 17/337,883, mailed Jan. 31, 2023. [cited by applicant]
Office Action for U.S. Appl. No. 17/337,883, mailed Apr. 6, 2023. [cited by applicant]