All digital if-to-baseband signal converter

Details All digital if-to-baseband signal converter All digital if-to-baseband signal converter

1993-11-24

1996-07-23

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

375330, 329306, H03D 322

Patent

active

055397760

ABSTRACT:
An intermediate frequency (IF) to baseband frequency signal converter for decoding an analog IF signal using phase information contained in the IF signal includes a first signal generator for generating an analog square wave signal from the IF signal. The signal converter also includes a second signal generator for generating a local phase reference signal, and a phase difference determinator for determining at a particular sampling interval a phase difference between a phase of the analog square wave signal and a phase of the local phase reference signal, wherein the phase difference represents a symbol which the signal converter has decoded from the IF signal.

REFERENCES:
patent: 5073905 (1991-12-01), Dapper et al.
patent: 5122758 (1992-06-01), Tomita
patent: 5313170 (1994-05-01), Kojima
patent: 5376894 (1994-12-01), Petranovich
Isao Shimizu, et al., New Digital Mobile Radio Technologies, NTT Review, vol.4, No.1, Jan. 1992.

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