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Three non-data-aided signal-to-noise ratio (SNR) estimator techniques are derived and compared for turbo decoding, in conjunction with block-coded binary-phase-shift-keying (BPSK) signals received over fully interleaved (i.e., uncorrelated) Rayleigh fading channels. These estimators, which do not require knowledge at the receiver of the channel SNR nor the power of fading amplitude, are optimized...
It is known that the signal to noise ratio (SNR) mismatch may cause degradation in error correction performance of turbo decoding. In order to obtain desired coding gain, a turbo decoder can perform online SNR estimation from the received data in each code block. This paper presents a novel SNR estimation method for turbo decoding over Rayleigh fading channels by utilizing the estimate ratio of the...
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