Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systemsReport as inadecuate

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EURASIP Journal on Advances in Signal Processing

, 2011:139

First Online: 23 December 2011Received: 12 February 2011Accepted: 23 December 2011


In this article, we propose a multiple-input-multiple-output, orthogonal frequency division multiplexing, code-division multiple-access MIMO OFDM-CDMA scheme. The main objective is to provide extra flexibility in user multiplexing and data rate adaptation, that offer higher system throughput and better diversity gains. This is done by spreading on all the signal domains; i.e, space-time frequency spreading is employed to transmit users- signals. The flexibility to spread on all three domains allows us to independently spread users- data, to maintain increased system throughput and to have higher diversity gains. We derive new accurate approximations for the probability of symbol error and signal-to-interference noise ratio SINR for zero forcing ZF receiver. This study and simulation results show that MIMO OFDM-CDMA is capable of achieving diversity gains significantly larger than that of the conventional 2-D CDMA OFDM and MIMO MC CDMA schemes.

Keywordscode-division multiple-access CDMA diversity space-time-frequency spreading multiple-input multiple-output MIMO systems orthogonal frequency-division multiplexing OFDM 4th generation 4G Electronic supplementary materialThe online version of this article doi:10.1186-1687-6180-2011-139 contains supplementary material, which is available to authorized users.

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Author: Haysam Dahman - Yousef Shayan


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