Carrier detector

Details Carrier detector Carrier detector

1994-01-19

1997-06-10

Bocure, Tesfaldet

Pulse or digital communications

Receivers

Angle modulation

375325, 375340, H04L 2714, H04L 2716

Patent

active

056384068

ABSTRACT:
A carrier detector which is capable of performing high-accuracy carrier detection even with patterns other than a CR pattern by processing signals on the frequency axis, regardless of the existence of the residual frequency due to the quasi-coherent detection. The carrier detector converts a received signal having been subject to the quasi-coherent detection, A/D conversion, filtering for eliminating noises and expressed on the time axis into that expressed on the frequency axis by the time axis/frequency axis converting circuit. An accumulator 2 accumulatively adds the signals expressed on the frequency axis, and a decision section compares the accumulated value output from the accumulator to a predetermined threshold to detect the coming of the burst so as to detect the carrier.

REFERENCES:
patent: 4562582 (1985-12-01), Tokura et al.
patent: 5276710 (1994-01-01), Iwasaki
patent: 5287388 (1994-02-01), Ogura et al.
patent: 5367539 (1994-11-01), Copley
"O db Eb/No Burst Mode SCPC Modem with High Coding Gain FEC" IEEE ICC'86 pp. 1792-1796.

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