| Wireless communication systems continue to strive for ever higher data rates. This goal is particularly challenging for those systems that are power, bandwidth, and complexity limited.A MIMO system takes the advantage of space-time coding or spatial multiplexing to obtain a significant capacity gain. Orthogonal Frequency Division Multiplexing (OFDM) has been regarded as one of the most promising technology for the higher band-width efficiency and superior performance in high data-rate digital transmissions over frequency selective fading channels. Combined OFDM with MIMO is one of the most promise emerging wireless technologies.This thesis investigates the fundamentals of multiple-input single-output (MISO) and multiple-input multiple-output (MIMO) radio communication systems with space time codes. A MISO system and MIMO systems were designed using multicarrier delay diversity modulation (MDDM). MDDM was incorporated with orthogonal frequency division multiplexing (OFDM). The design was implemented with binary phase shift keying (BPSK). Matlab was used to simulate the design, which was tested in both an additive white Gaussian noise (AWGN) channel and in a slow fading frequency nonselective multipath channel with AWGN. The receiver design was incorporated with the maximal ratio combiner (MRC) receiving technique with perfect knowledge of channel state information (CSI). The theoretical performance was derived for both channels and was compared with the simulated results. |
