MULTIPLE SIGNAL RECEIVER

MULTIPLE SIGNAL RECEIVER

PURPOSE:To separate a stereo signal well surely and stably, by extracting pilot signal components from two demodulation signals to correct the phase error of a reproducing carrier wave corresponding to the carrier wave to be modulated in the AM stereo receiver. CONSTITUTION:When pilot components in...

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Hauptverfasser: TANABE KENZOU, NEZU SHIYUNICHI
Format: Patent
Sprache:eng
Schlagworte:
BROADCAST COMMUNICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
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creator TANABE KENZOU
NEZU SHIYUNICHI
description PURPOSE:To separate a stereo signal well surely and stably, by extracting pilot signal components from two demodulation signals to correct the phase error of a reproducing carrier wave corresponding to the carrier wave to be modulated in the AM stereo receiver. CONSTITUTION:When pilot components in outputs of multipliers 6 and 7 for a phase error phi are denoted as P1 and P2, P1=-(1/2)Psinphi and P2-(1/2)Pcosphi are true, and these pilot components are extracted by BPFs 10 and 11. These signals P1 and P2 are multiplied in a multiplier 12, and DC components A(phi) having the phase error discrimination characteristics are extracted by an LPF13. This signal A(phi) controls a local oscillator 3. Thus, a carrier wave generator 5 utilizes the fact that the phase difference between an input signal and an output signal is changed by the input signal frequency to correc the phase error.
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subjects BROADCAST COMMUNICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
title MULTIPLE SIGNAL RECEIVER
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