Spread-spectrum receiver

Details Spread-spectrum receiver Spread-spectrum receiver

1997-12-15

2000-10-03

Chin, Stephen

Pulse or digital communications

Spread spectrum

Direct sequence

375130, 375143, 375152, 375148, H04L 2730

Patent

active

061283290

ABSTRACT:
A high frequency signal received by an antenna is converted into a base-band signal through frequency conversion and quadrature detection in a radio circuit. Through search processing of the base-band signal in a timing control circuit, timings for a plurality of paths are detected, whereby first and second replica code timing indicating signals, a timing pulse, and first and second delay time indicating signals are generated. In first and second replica code generators, first and second replica codes are generated at timings indicated by the first and second replica code timing indicating signals, respectively. In first and second correlators, a correlation value of the base-band signal and the first replica code and a correlation value of the base-band signal and the second replica code are determined, respectively. In first and second synchronous detectors, output signals of the first and second correlators undergo synchronous detections, respectively, whereby first and second symbols are outputted. In first and second timing adjusting buffers, the first and second symbol signals are latched in response to the timing pulses, respectively, and the first and second symbol signals as latched are outputted with delay times indicated by the first and second delay time indicating signals, respectively. Output signals from the first and second timing adjusting buffers are combined together by a RAKE combining circuit.

REFERENCES:
patent: 5663990 (1997-09-01), Bolgiano et al.
patent: 5764687 (1998-06-01), Easton
patent: 5859874 (1999-01-01), Wiedeman et al.
patent: 5943362 (1999-08-01), Saito
Tateesh S., et al., "Channel Adapted RAKE Receiver (CARAKE) for Coherent Uplink Demodulation", IEEE Second Symposium on Communications and Vehicular Technology in the Benelux, Nov. 23, 1994, pp. 155-158.
Office Action dated Feb. 29, 2000 in a corresponding foreign application.

Affiliated with

Also associated with

Rating

Spread-spectrum receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spread-spectrum receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spread-spectrum receiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-202529