Spread spectrum receiver

Details Spread spectrum receiver Spread spectrum receiver

1991-07-03

1992-07-21

Gregory, Bernarr E.

Pulse or digital communications

Repeaters

Testing

380 34, 375 80, 375 94, 375 96, H04L 2730

Patent

active

051329859

ABSTRACT:
A spread spectrum receiver has first and second correlators which each compare a received signal with a respective reference signal. The output of each correlator is routed through a respective band pass filter and a respective AGC amplifier to a respective detector circuit which converts the output of the amplifier into a respective base band signal. The ouput of each detector circuit is supplied to a respective peak value detecting and holding section, which detects and holds for a predetermined time period peak values from the associated detector circuit. Each peak value detecting and holding circuit supplies the peak value currently held therein through a respective low pass filter which serves as an integrator to a data comparing section and to an adding section. The adding section adds the two peak values, and supplies the sum to control inputs of each of the AGC amplifiers for purposes of gain control. The data comparing circuit compares the peak values and produces an output which is demodulated data from the received signal.

REFERENCES:
patent: 3391344 (1968-07-01), Goldberg
patent: 4112372 (1978-09-01), Holmes et al.
patent: 4301537 (1981-11-01), Roos
patent: 4485477 (1984-11-01), Nossen
patent: 4736390 (1988-04-01), Ward et al.
patent: 4866734 (1989-09-01), Akazawa et al.
patent: 4899364 (1990-02-01), Akazawa et al.
patent: 4924188 (1990-05-01), Akazawa et al.
patent: 4993044 (1991-02-01), Akazawa

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