Bit Interleaved Coded Modulation with Multi-Labeled Signal Mapping

In this paper, we propose multi-labeled signal mapping as a means to improve the performance of bit interleaved coded modulation with iterative decoding (BICM-ID). By using an inner mapping that assigns multiple code symbols to each signal point we can improve the distance properties of the BICM- ID system. The use of an outer block code will compensate for the higher information loss that the multi-labeling inevitably entails. Hence, convergence at low signal-to-noise ratios (SNR´s) will still be possible. The considered system is BICM-ID with 2 bits/symbol and 8PSK signaling. Simulation results are obtained for the additive white Gaussian noise (AWGN) channel.