Method of estimating signal quality in a DPSK demodulator

Details Method of estimating signal quality in a DPSK demodulator Method of estimating signal quality in a DPSK demodulator

1995-07-31

1998-03-24

Vo, Don N.

Pulse or digital communications

Testing

Phase error or phase jitter

375327, 375330, 375340, 375355, 375371, 329304, H04B 346, H04B 1700

Patent

active

057321051

ABSTRACT:
A method of estimating signal quality in a radio demodulator receiving an input stream of symbols includes the steps of sampling a phase-only portion of each of the symbols in the input stream, determining a phase error for each of the samples of the phase-only portions, and calculating a signal quality estimate from a plurality of the sample phase errors. The signal quality estimate may be an average magnitude of a predetermined number of sample phase errors. The input stream may be symbols in the preamble, or symbols in the data signal that follows.

REFERENCES:
patent: 5001724 (1991-03-01), Birgenheier et al.
patent: 5490177 (1996-02-01), La Rosa et al.

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