Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2003-06-30
2008-09-23
Ghayour, Mohammad (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S144000, C375S346000
Reexamination Certificate
active
07428261
ABSTRACT:
Interference cancellation techniques for use in a wireless multicarrier communications system where signals from multiple wireless networks might be present and interfering with the detection and demodulation processes are disclosed. Interference cancellation is applied to the interfering network before removing same-system interference. By removing the contribution of all interfering systems' from a receiver's aggregate signal, the receiver is capable of detection and demodulation. Performance can be further improved by including an additional level of interference cancellation within the system of interest to separate the individual user of interest.
REFERENCES:
patent: 5533013 (1996-07-01), Leppanen
patent: 6115409 (2000-09-01), Upadhyay et al.
patent: 6128276 (2000-10-01), Agee
patent: 6359923 (2002-03-01), Agee et al.
patent: 6834109 (2004-12-01), Pare et al.
patent: 7023265 (2006-04-01), Helard et al.
patent: 7161927 (2007-01-01), Wu et al.
patent: 2003/0072291 (2003-04-01), Brunel
patent: 2004/0013174 (2004-01-01), Nuutinen et al.
patent: 2004/0184399 (2004-09-01), Chiou
Hou et al., Adative Narrowband Interference Rejection in DS-CDMA Systems: A Scheme of Parallel Inteference Cancellers, Jun. 2006, IEEE Journal On Selected Areas in Communications, vol. 19, pp. 1103-1114.
Karwedsky, K., Multicarrier CDMA with Cross-system Interference Cancellation, Mar. 21-25, 2004, wireless Communications and Networking Conference, vol. 3, pp. 1823-1827.
Mills et al., Multicarrier CDMA with Cross-System Interference Cancellation, Mar. 21-25, 2004, Wireless Communications and Networking Conference, Vo. 3, pp. 1823-1827.
Sharma, Naresh et al., “Multiuser Demodulation and Interative Decoding for Frequency-Hopped Networks”, IEEE Transactions on Communications, Aug. 2001, pp. 1437-1446, vol. 49, No. 8.
Weitzen, Jay, “Digital Modulation III QAM Introduction to Communication”, pp. 1-37, date unknown.
Halford, Karen et al., “Multistage Multiuser Detection for FHMA”, IEEE Transactions on Communications, Sep. 2000, pp. 1550-1562, vol. 48, No. 9.
Litwin, Louis, “OFDM: An Introduction to Multicarrier Modulation”, IEEE Potentials, Apr./May 2000, pp. 36-38.
Hara, Shinsuke et al., “Overview of Multicarrier CDMA”, IEEE Communications Magazine, Dec. 1997, pp. 126-133.
Wang, Zhengdao et al. “Wireless Multicarrier Communications”, IEEE Signal Processing Magazine, May 2000, pp. 29-48.
Fazel, Khaled, “Performance of CDMA/OFDM for Mobile Communication System”, IEEE ICUPC Conference, 1993, pp. 975-979.
Kaiser, Stefan et al., “Multi-Carrier CDMA with Interative Decoding and Soft-Interference Cancellation”, IEEE, 1997, pp. 6-10.
Sugimoto, Hiroki et al., “Mapping Functions for Successive Interference Cancellation in CDMA”, IEEE VTC, 1998, pp. 2301-2305.
Oyama, Takashi et al., “Performance Comparison of Multi-Stage SIC and Limited Tree-Search Detection in CDMA”, IEEE VTC, 1998, pp. 1854-1858.
Karwedsky Kari M.
Kotrlik Michael J.
Mills Diane G.
Bae Systems Information and Electronic Systems Integration Inc.
Ghayour Mohammad
Vern Maine & Associates
Williams Lawrence B
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