Title :
Code-aided SNR estimation based on expectation maximisation algorithm
Author :
Wu, N. ; Wang, H. ; Kuang, J.-M.
Author_Institution :
Dept. of Electron. Eng., Beijing Inst. of Technol., Beijing
Abstract :
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.
Keywords :
AWGN channels; channel coding; channel estimation; expectation-maximisation algorithm; iterative decoding; AWGN channel; MPSK; MQAM; channel decoder; code-aided SNR estimation; expectation maximisation algorithm; higher-order modulation; iterative method;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20081216
