ABSTRACT
Multiple-input multiple-output (MIMO) technology is one of the most significant and promising advances in digital communications because it offers higher transmission rates and improved biterror-rate (BER) performance over single antenna systems. The use of multiple antennas to increase the throughput of the communication channel or increase its reliability has been quantified by defining three related terms: rate, multiplexing gain, and diversity gain. The rate of a communication system defines the number of transmitted symbols per channel use. The multiplexing and diversity gains define how fast the rate increases or how fast the error probability decreases, respectively, with increase in signal-to-noise ratio (SNR) in the high SNR region [1]. For any number of antennas, there is a continuous trade-off between the diversity and multiplexing gains. The diversity gain and code rate, however, can be simultaneously maximized.
