Phase compressor for phase modulated signal

Details Phase compressor for phase modulated signal Phase compressor for phase modulated signal

1976-01-26

1977-05-03

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325349, 328134, 328155, 329124, H03D 302

Patent

active

040217426

ABSTRACT:
A phase compressor for a phase modulated signal comprises n phase suppressors (n is an integer greater than 2), each of which includes an adder and a limiter. The n phase suppressors are connected in series with one another. In this case, outputs from the limiters of nth, (n - 1)th, (n - 2)th, . . . . 2nd phase suppressors are individually supplied to the adders along with outputs from the (n - 1)th, (n - 2)th, . . . . 1st phase suppressors, respectively. A reference signal is supplied to the adder of the nth phase suppressor, by which a modulated phase angle of the phase modulated signal with a wide modulation index is phase-compressed by 1/.sub.n.sub.+1. The phase compressed signal is phase-demodulated by a phase demodulator without decreasing a signal-noise ratio.

REFERENCES:
patent: 3358240 (1967-12-01), McKay

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