Ramy H. Gohary and Timothy N. Davidson.
Design of linear dispersion codes:
Some asymptotic guidelines and their implementation
IEEE Transactions on Wireless Communications,
4(6):2892-2906, November 2005.
In this paper, a design method is developed for the class of linear-dispersion (LD) codes - a diverse set of space-time codes that subsumes several standard designs. The development begins by showing that for systems that employ a large number of transmit antennas, LD codes constructed from unitary coding matrices are asymptotically optimum from different design perspectives, viz., minimum mean square error (MMSE), mutual information, and average pairwise error probability (PEP). Those measures have a direct impact on the detection complexity, data rate, and error performance that a space-time code can achieve. Using the insight generated by the asymptotic result, a structured design technique for the LD coding matrices, that suits a broad class of configurations is provided. The resulting codes can support high data rates and provide performance advantages over current designs when decoded with a standard detector. Based on the asymptotic results, a row interleaving scheme is proposed, and it is shown to result in significant performance enhancement.
Part of this work appeared in the Proceedings of the Fourth IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, Rome, June 2003.
In the following Matlab *.mat files we have provided the codes that we designed for the journal paper.
Back to my publications-by-topic page.