Method of and apparatus for demodulating a signal conveyed by mu

Details Method of and apparatus for demodulating a signal conveyed by mu Method of and apparatus for demodulating a signal conveyed by mu

1995-09-29

1996-07-30

Grimm, Siegfried H.

Demodulators

Phase shift keying or quadrature amplitude demodulator

Input signal combined with local oscillator or carrier...

329316, 375327, 375376, H04L 2722

Patent

active

055415520

ABSTRACT:
A demodulating apparatus for receiving and demodulating a signal transmitted by use of a plurality of carriers having different frequencies employs a demodulator for frequency-analyzing a specific time waveform defined by data in one modulation symbol duration and guard times accompanying the data to provide a demodulated waveform. A correlation detector determines a correlation value between the received signal and a signal spaced apart from the received signal by a period corresponding to one modulation symbol duration. An integrating circuit integrates the correlation detected signal, and a peak-position discriminator determines a peak-position of an integrated value supplied thereto from the integrating circuit. Correction of timing and frequency offsets in the demodulation processing is carried out on the basis of the peak-position information discriminated by the peak-position discriminator.

REFERENCES:
patent: 5226081 (1993-07-01), Hinokimoto

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