Communication system receiver apparatus and method for fast carr

Details Communication system receiver apparatus and method for fast carr Communication system receiver apparatus and method for fast carr

1991-05-10

1993-08-03

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375116, H04L 2706

Patent

active

052336328

ABSTRACT:
A communications system receiver (100) is disclosed which receives a transmitted signal over a radio channel. The transmitted signal includes data and a predetermined synchronization sequence. The receiver (100) includes a demodulator (215), and a stored replica (207) of the predetermined synchronization sequence. The receiver (100) further includes apparatus (102) for computing (308) a reconstructed signal, by using the channel impulse response characteristic and the stored replica (207) of the synchronization sequence. A feature of the invention is to estimate (310) a phase offset value between an incoming signal and the reconstructed signal, for a plurality of synchronization symbols. This serves to establish (315) a relationship between the phase offset and a synchronization symbol index. The receiver then employs this relationship to derive (317) at least one "previous" phase state (214) for initializing (314) the demodulator (215).

REFERENCES:
patent: 4527491 (1985-07-01), Deconche et al.
patent: 5012491 (1991-04-01), Iwasaki

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