Mohamed A. El-Azizy, Ramy H. Gohary and Timothy N. Davidson.
A BICM-IDD Scheme for Non-Coherent MIMO Communication
IEEE Transactions on Wireless Communications,
8(2):541-546, February 2009.
A bit-interleaved coded modulation (BICM) scheme with iterative (soft) demapping and decoding (IDD) is developed for non-coherent communication over a multiple-input multiple-output (MIMO) channel. The scheme exploits the underlying Grassmannian geometry of the signalling scheme that approaches the ergodic capacity of the non-coherent model at high signal-to-noise ratios. In particular, this geometry guides the construction of the constellation and the mapper at the transmitter, and gives rise to a computationally-efficient list-based demapping algorithm. The incorporation of a scheme that enables the decoder to augment the demapping list virtually eliminates the mild performance degradation of the efficient demapper. Simulation results demonstrate that at high data rates the proposed scheme can provide significantly better performance than several training-based BICM-IDD schemes.
The paper is available as a pdf file.
The core of the BICM-IDD scheme developed herein is based on earlier work on Grassmannian constellations and efficient detection
Recently, we have developed new lablelling schemes for Grassmannian constellations, and some of these have resulted in significant improvements in performance.
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