Spectrum spread signal reception with differential demodulation

Details Spectrum spread signal reception with differential demodulation Spectrum spread signal reception with differential demodulation

1994-12-28

1997-03-18

Bocure, Tesfaldet

Pulse or digital communications

Repeaters

Testing

375355, H04K 100, H04L 700

Patent

active

056129726

ABSTRACT:
In a spectrum spread receiver, a tracking unit tracks successive regions covering maximum correlation values, respectively, in spectrum spread demodulated components to produce a timing signal indicative of synchronous points respectively in the regions. Responsive to the timing signal, a differential demodulator unit demodulates the spectrum spread demodulated components at each synchronous point and at a time which is always one symbol period later than this synchronous point. Differential demodulation is carried out in this manner so as to be faithfully inverse relative to differential modulation in a spectrum spread transmitter.

REFERENCES:
patent: 4829543 (1989-05-01), Borth et al.
patent: 5018166 (1991-05-01), Tjahjadi et al.
patent: 5084913 (1992-01-01), Kinoston et al.
patent: 5128960 (1992-07-01), van Driest et al.
patent: 5131006 (1992-07-01), Kamerman et al.
patent: 5151920 (1992-09-01), Haagh et al.
patent: 5311544 (1994-05-01), Park et al.
patent: 5402450 (1995-03-01), Lennen

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