S/N ratio determining method and apparatus for a receiver

Details S/N ratio determining method and apparatus for a receiver S/N ratio determining method and apparatus for a receiver

1984-06-06

1986-12-02

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

324 57N, H04B 1700

Patent

active

046271031

ABSTRACT:
The signal-to-noise ratio of a signal having positive and negative components is determined by periodically sampling polarity values of the signal. The numbers of the sampled values of each polarity are accumulated. A quantitative measure of the relative accumulated numbers of the sampled values of each polarity is determined. A stored function of signal-to-noise ratio as a function of the quantitative measure and the number of samples is correlated with the derived quantitative measure.

REFERENCES:
patent: 3350643 (1967-10-01), Webb
patent: 3475683 (1969-10-01), Hulland
patent: 4074201 (1978-02-01), Lennon
patent: 4185242 (1980-01-01), Schaible

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