Direct sequence CDMA coherent uplink detector

Details Direct sequence CDMA coherent uplink detector Direct sequence CDMA coherent uplink detector

1994-04-29

1996-08-06

Hsu, Alpus H.

Multiplex communications

Wide area network

Packet switching

370 84, 375206, 375325, 375340, H04B 7216, H04L 2722

Patent

active

055441564

ABSTRACT:
A system and method for coherently demodulating an uplink signal in a multirate, CDMA system. By first demodulating information in a control channel which relates to the data rate of a data field in a frame of the data channel of the received signal, phase information can be derived so as to generate a reference for coherent demodulation.

REFERENCES:
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patent: 5048053 (1991-09-01), Mower et al.
patent: 5216691 (1993-06-01), Kaufmann
patent: 5285482 (1994-02-01), Sehier et al.
patent: 5329547 (1994-07-01), Ling
patent: 5337331 (1994-08-01), Sadot et al.
"An Analysis of Pilot Symbol Assisted Modulation for Rayleigh Fading Channels", James K. CAVERS, IEEE Transactions on Vehicular Technology, vol. 40, No. 4, pp. 686-693, Nov. 1991.
"Tradeoff Between Channel Coding and Spreading for DS-CDMA", Peter HOEHER, pp. 1-3, submitted to IEEE Trans. on Vehicular Technology.
"Near Maximum Likelihood Demodulation for M-ary Orthogonal Signalling", Rod WALTON et al., pp. 5-8, IEEE, 1993.
International Search Report completed 19 May 1995.

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