Modulation circuit for a digital radio communications apparatus

Details Modulation circuit for a digital radio communications apparatus Modulation circuit for a digital radio communications apparatus

1992-05-26

1994-11-08

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375 39, 375 54, 375 56, 375 84, 329304, 332103, H03C 302

Patent

active

053634101

ABSTRACT:
A modulation circuit includes a mapping position detector as well as a circuit for differentially phase coding a plurality of separated data streams. The differentially phase coding circuit is adapted to differentially phase code the plurality of data streams for each pulse time and generate a coded signal containing amplitude information. The mapping position detector detects the phase mapping position of the coded signal based on the amplitude information in the coded signal which is output from the differentially phase coding circuit. Information representing the detected phase mapping position is supplied to the differentially phase coding circuit so as to achieve a differential phase coding at a pulse time following one pulse time.

REFERENCES:
patent: 4613976 (1986-09-01), Sewerinson et al.
patent: 5210775 (1993-05-01), Takahara et al.

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