Multiple Antenna Techniques

摘要: Recent developed information theory results have demonstrated the enormous potential to increase system capacity by exploiting multiple antennas. Combining antennas with orthogonal frequency division multiplexing (OFDM) is regarded as a very attractive solution for next-generation wireless communications effectively enhance service quality over multipath fading channels at affordable transceiver complexity. In this regard, antennas, or called multiple-input multiple-output (MIMO) systems, emerged an essential technique communications. general, MIMO has capability offer three types of antenna gains: diversity gains, gains and beamforming gains. A wide variety schemes been investigated achieve these while some combo can make tradeoffs among chapter, overview techniques in past decade, well their architecture designs, introduced. The first part chapter covers kinds schemes: maximum ratio combining (MRC), space-time coding (STC), transmission (MRT), which are commonly used combat channel improve signal without knowledge transmitter receiver. second concentrates on spatial data rate simultaneously transmitting streams additional bandwidth power expenditure. Several basic receiver architectures handling inter-antenna interference, including zero-forcing (ZF), minimum mean square error (MMSE), interference cancellation, etc., then third introduces signal-tointerference plus noise (SINR) coherently signals different phase amplitude receiver, also known transmit receive beamforming. Another benefit adopting facilitate multiuser accesses domain control interference. optimal designs presented chapter.