Modulation Diversity in Fading Channels with a Quantized Receiver


In this paper, we address the design of codes which achieve modulation diversity in block fading singleinput single-output (SISO) channels with signal quantization at the receiver. With an unquantized receiver, coding based on algebraic rotations is known to achieve maximum modulation coding diversity. On the other hand, with a quantized receiver, algebraic rotations may not guarantee gains in diversity. Through analysis, we propose specific rotations which result in the codewords having equidistant component-wise projections. We show that the proposed coding scheme achieves maximum modulation diversity with a low-complexity minimum distance decoder and perfect channel knowledge. Relaxing the perfect channel knowledge assumption we propose a novel channel training/estimation technique to estimate the channel. We show that our coding/training/estimation scheme and minimum distance decoding achieves an error probability performance similar to that achieved with perfect channel knowledge.

DOI: 10.1109/TWC.2011.111211.110630

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@article{Mohammed2012ModulationDI, title={Modulation Diversity in Fading Channels with a Quantized Receiver}, author={Saif K. Mohammed and Emanuele Viterbo and Yi Hong and Ananthanarayanan Chockalingam}, journal={IEEE Trans. Wireless Communications}, year={2012}, volume={11}, pages={316-327} }