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The use of Multiple Element Antenna (MEA) at transmitter and receiver side provides possibility of significant rise in the throughput of a fading channel. Recent research shows that use of multiple antenna elements improves the performance when large number of pair of transmit-receive antennas are available from which subset of antenna is selected based on the channel realization. In this paper we have considered the MEA system for improving the capacity of system. We have combined MEA system with DS-CDMA based OFDM System for Ultra wideband (UWB) communications and ensured the performance. We have considered DS-CDMA based OFDM system model with Multiuser Interference (MUI) and without MUI. Here, we have considered the different antenna selection techniques for improving performance of the system. In this paper we have considered the optimal and suboptimal antenna selection criterion with DS-CDMA based OFDM system.