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Code-aided SNR estimation based on expectation maximisation algorithm

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3 Author(s)
N. Wu ; Dept. of Electron. Eng., Beijing Inst. of Technol., Beijing ; H. Wang ; J. -M. Kuang

A code-aided signal-to-noise ratio (SNR) estimator based on the expectation maximisation algorithm is proposed. The method iteratively uses the soft information from the channel decoder and significantly improves estimation precision in the low SNR regime. It can be extended to higher-order modulation such as MPSK and MQAM directly.

Published in:

Electronics Letters  (Volume:44 ,  Issue: 15 )