On-line channel quality monitor for a communication channel

Details On-line channel quality monitor for a communication channel On-line channel quality monitor for a communication channel

1979-05-31

1981-12-08

Atkinson, Charles E.

Excavating

328115, 371 5, 455 67, H04B 1700, G06F 1100

Patent

active

043051502

ABSTRACT:
An on-line channel monitor, for measuring E.sub.b /N.sub.O, measures the quality of a communication channel while the channel is in use. The channel monitor employs a soft-decision demodulator so as to compare analog signal levels of an AGC compensated signal in a demodulator with the desired signal level. Deviations, termed pseudo-errors, are counted and the number of counts integrated. The result is employed to drive a meter calibrated in terms of E.sub.b /N.sub.O.

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Keelty et al., On-Line Pseudo-Error Monitors for Digital Transmission Systems, IEEE Trans. on Comm., vol. COM-26, No. 8, Aug. 1978, pp. 1275-1282.

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