Receiver in a wireless communications system for receiving signa

Details Receiver in a wireless communications system for receiving signa Receiver in a wireless communications system for receiving signa

1998-10-19

2000-11-28

Ghebretinsae, Temesghen

Pulse or digital communications

Spread spectrum

375267, H04B 169

Patent

active

06154485&

ABSTRACT:
A receiver for use in a wireless communication system, wherein the wireless communication system includes a transmitter that spreads data with multiple spreading codes. The receiver includes a plurality of despreaders for despreading with multiple despreading codes corresponding to the multiple spreading codes in the transmitter. A plurality of demodulators demodulate outputs of the plurality of despreaders, and a demultiplexer demultiplexes the outputs of the plurality of demodulators. A decoder decodes the output of the multiplexer to produce received traffic channel data. The receiver uses a pilot selector for selecting, in response to a control signal, a reference signal for use in the plurality of demodulators. A mode detector that produces the control signal is responsive to the transmitter transmitting in an orthogonal transmit diversity mode or an adaptive array mode.

REFERENCES:
patent: 5028931 (1991-07-01), Ward
patent: 5467367 (1995-11-01), Izumi et al.
patent: 5623485 (1997-04-01), Bi
patent: 5764690 (1998-06-01), Blanchard et al.
patent: 5956368 (1999-09-01), Jamal et al.
Kamyar Rohani and Louay Jalloul, "Orthogonal Transmit Diversity for Direct Spread CDMA", Contribution to European Telecommunications Standards Institute (ETSI) SMG2 dated Sep. 12, 1997.
Mark Harrison, "Transmit Adaptive Array Description, New Results, and Feedback Channel", Telecommunications Industry Association (TIA) Contribution Document #TR45.5.3.1/98.09.17.03, Sep. 17, 1999.

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