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A Performance Evaluation of CDMA/MIMO Communication System using permutation Spreading

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Author(s): B.Raja Ramesh

Journal: International Journal of Engineering Trends and Technology
ISSN 2231-5381

Volume: 4;
Issue: 6;
Start page: 2283;
Date: 2013;
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Keywords: CDMA | MIMO | Fading | Bit Error Rate (BER).

ABSTRACT
In this paper we propose code division multiple access (CDMA) systems employing this technique, the calculated parity bits are used to select a spreading sequence from a set of mutually orthogonal spreading sequences. This technique was extended to CDMA systems using multiple input multiple output (MIMO) techniques. We compare the performance of the two techniques for MIMO-CDMA systems operating on frequency-flat slowly Rayleigh fading channels. The new designs improve the bit error rate (BER) compared to MIMO-CDMA systems that use spreading permutations based on T-designs. This BER improvement comes without any increase in system complexity

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