MIMO Wireless Communication
Abstract:
Wireless communication using multiple-input multiple-output MIMO systems enables increased spectral efficiency for a given total transmit power. Increased capacity is achieved by introducing additional spatial channels that are exploited by using space-time coding. In this article, we survey the environmental factors that affect MIMO capacity. These factors include channel complexity, external interference, and channel estimation error. We discuss examples of space-time codes, including space-time low-density parity-check codes and space time turbo codes, and we investigate receiver approaches, including multichannel multiuser detection MCMUD. The multichannel term indicates that the receiver incorporates multiple antennas by using space-time-frequency adaptive processing. The article reports the experimental performance of these codes and receivers.