Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Patent
1996-06-27
1999-06-22
Pham, Chi H.
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
375342, 329311, 329312, 36472411, 36472401, H03D 100, H03K 900, G06F 1710
Patent
active
059149876
ABSTRACT:
A method of recovering a finite duration of N symbols of a digitally-modulated signal, wherein a received signal is sampled at a period T.sub.1, generating a batch of K.sub.1 samples, wherein K.sub.1 is chosen to be an integer multiple of the N symbols. The K.sub.1 time-domain samples are input to a discrete fourier transform (20) providing a first batch of K.sub.1 frequency-domain samples. The first batch of K.sub.1 frequency-domain samples are multiplied by a set of frequency-domain K.sub.1 complex gains to provide a second batch of K.sub.1 frequency-domain samples. The second batch of K.sub.1 frequency-domain samples are broken into K.sub.1 /N batches of N samples. The K.sub.1 /N batches are added, generating a single batch of N samples which is input to an inverse fast fourier transform (24) to obtain N time-domain samples.
REFERENCES:
patent: 3864632 (1975-02-01), Chang
patent: 5285474 (1994-02-01), Chow et al.
patent: 5596607 (1997-02-01), Larsson et al.
patent: 5627863 (1997-05-01), Aslanis et al.
Moreno Christopher P.
Motorola Inc.
Pham Chi H.
Tran Khai
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