Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-04-11
2006-04-11
Chin, Stephen (Department: 2634)
Pulse or digital communications
Spread spectrum
Direct sequence
Reexamination Certificate
active
07027485
ABSTRACT:
In a method of discriminating a received spread spectrum signal among a number of received spread spectrum signals that are transmitted over a transmission channel, the received spread spectrum signal is despread, thereby using a locally generated pseudo noise sequence with a given phase offset. The despread received spread spectrum signal is quantized so as to obtain a probability mass function estimate of the despread received spread spectrum signal. A difference is determined between the probability mass function estimate and a true probability mass function that corresponds to a transmitted spread spectrum signal before transmission over the transmission channel. The difference is accumulated over a given number of symbols so as to obtain a statistic of the received spread spectrum signal. If the statistic fails a test against a given threshold, the received spread spectrum signal is rejected. Otherwise, the statistic is accepted.
REFERENCES:
patent: 5889768 (1999-03-01), Storm et al.
patent: 6049574 (2000-04-01), Noonan et al.
patent: 6052602 (2000-04-01), Yamamoto
patent: 6085091 (2000-07-01), Yoo et al.
patent: 6128331 (2000-10-01), Struhsaker et al.
patent: 98/00999 (1998-01-01), None
patent: 00/35220 (2000-06-01), None
“Improved type-based detection of analog signals” Johnson, D.H.; Goncalves, P.A.; Baraniuk, R.G.;Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on , vol.: 5 , Apr. 21-24, 1997 pp.: 3717-3720 vol. 5.
Lin Yue et al. : Universal Classification for CDMA Communications : Single-User Receivers and Multi-User Receivers, Communications , 1998, ICCC 98. Conference Record. 1998 IEEE International Conference on Atlanta, GA, USA Jun. 7-11, 1998, New York, NY, USA, IEEE, US, Jun. 7, 1998. pp. 748-752.
Lin Yue et al: Signal Detectin on Wirless CDMA Downlink, Vehicular Technology Conference, 1998, VTC May 1998, New York, NY, USA, IEEE, US, May 18, 1998, pp. 2522-2526.
Yuan Kan Lee et al: Type-Based Detection for Spred Spectrum, Communications, 1997. ICC '97 Monteal, Toward the Knowledge Millennium. 1997 IEEE International Conference on Montreal, Que., Canada Jun. 8-12, 197, New York, NY, USA, IEEE, US, Jun. 8, 1997, pp. 1212-1217.
Chin Stephen
Koninklijke Philips Electronics , N.V.
Vartanian Harry
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