We consider the problem of optimization of the training sequence length when a turbo-detector composed of a maximum a posteriori (MAP) equalizer and a MAP decoder is used. At each iteration of the receiver, the channel is estimated using the hard decisions on the transmitted symbols at the output of the decoder. The optimal length of the training sequence is found by maximizing an effective signal-to-noise ratio (SNR) taking into account the data throughput loss due to the use of pilot symbols.
['Imed Kacem', 'Noura Sellami', 'Inbar Fijalkow', 'Aline Roumy']
Training sequence length optimization for a turbo-detector using decision-directed channel estimation