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PCM Data Reliability Monitoring Through Estimation of Signal-to-Noise Ratio

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2 Author(s)
R. Gagliardi ; Univ. of Southern California, Los Angeles, CA ; C. Thomas

Reliability monitoring of digital pulse-code modulation (PCM) data in coherent transmission systems can be based upon online estimation of signal-to-noise ratio (SNR) at the receiver. Maximum likelihood SNR estimation is analyzed to determine the structure of the estimator and its ability to monitor error rates with a given degree of confidence. In particular, relationships between estimation confidence intervals, observation time, word error rates, and PCM word structure are developed.

Published in:

IEEE Transactions on Communication Technology  (Volume:16 ,  Issue: 3 )