Umasankar  Chilumuri, K.  Haribabu, S.V.S.  Prasad, 
    A Performance Evaluation of CDMA/MIMO Communication System Using
Permutation Spreading,
    Journal of Engineering and Applied Sciences,
    Volume 13,Issue 6,
    2018,
    Pages 1526-1530,
    ISSN 1816-949x,
    jeasci.2018.1526.1530,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2018.1526.1530)
    Abstract: In this study, 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.
    Keywords: CDMA;MIMO;fading;Bit Error Rate (BER);compared;Rayleigh