Signal to noise and interface estimator for analog voice channel

Details Signal to noise and interface estimator for analog voice channel Signal to noise and interface estimator for analog voice channel

1997-12-15

2000-10-03

To, Doris H.

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455 676, 4552263, 375227, 375371, H04B 1700

Patent

active

061284947

ABSTRACT:
The residual phase deviation of the supervisory audio tone (SAT) and/or signaling tone (ST) signal in an analog voice channel cellular communication system is used to estimate the underlying signal-to-noise ratio (SNR) and signal-to-interference ratio (SIR). The phase deviation is estimated using a two-stage autoregressive filter/variance estimator, which may be implemented in firmware in a digital signal processor.

REFERENCES:
patent: 4412299 (1983-10-01), Huffman
patent: 4688234 (1987-08-01), Robinton
patent: 5214687 (1993-05-01), Kansakoski et al.

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