Method of digital differential demodulation

Details Method of digital differential demodulation Method of digital differential demodulation

1997-07-10

1999-09-28

Pham, Chi H.

Pulse or digital communications

Receivers

Angle modulation

375200, 329371, H04L 2714, H04L 2716, H04L 2722

Patent

active

059600454

ABSTRACT:
A method of digital differential demodulation if which the signal to be demodulated is over sampled at a rate double the rate of the elements of the spread sequence, the products of a current sample and the preceding conjugated sample are calculated and these products are summed, possibly weighting them, in a window covering at least a part of the period of the information symbols, the real part of this sum is taken in order to obtain a decision sample used to reconstruct the information. The method is applicable to multiple access type transmissions with code division.

REFERENCES:
patent: 4969159 (1990-11-01), Belcher et al.
patent: 5506862 (1996-04-01), McIntosh
patent: 5754599 (1998-05-01), Ling et al.

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