Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
A distance spectrum interpretation of turbo codes
IEEE Transactions on Information Theory - Part 1
The capacity of low-density parity-check codes under message-passing decoding
IEEE Transactions on Information Theory
Analysis of sum-product decoding of low-density parity-check codes using a Gaussian approximation
IEEE Transactions on Information Theory
Analyzing the turbo decoder using the Gaussian approximation
IEEE Transactions on Information Theory
Iterative turbo decoder analysis based on density evolution
IEEE Journal on Selected Areas in Communications
Decoder-assisted frame synchronization for packet transmission
IEEE Journal on Selected Areas in Communications
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In this paper we propose a method for on-line estimation of Bit Error Rate during turbo decoding. We model the log-likelihood ratios as a mixture of two Gaussian random variables and derive estimators for the mean and variance of these distributions based on a Maximum-Likelihood approach. The parameter estimates are then employed to calculate the cross-over area of the Gaussian tails to estimate BER at each decoder iteration. The performance of the BER estimator is analysed and compared.