Advanced wireless communications

Fourth generation wireless networks are close to being formally standardized, and researchers have already proposed many ways to make them perform better. Techniques such as adaptive coding and modulation, iterative turbo decoding and space-time coding are now mature enough for manufacturers to build. This volume concentrates on the parts of a 4G system that let it adjust itself and be reconfigured, and it shows how those abilities raise overall performance.

The book examines several technologies that together make up 4G: adaptive wideband CDMA, adaptive time division multiple access, multicarrier OFDMA and ultra wideband receivers. It compares them side by side and considers how they might operate alongside one another in the future.

The coverage is broad. It addresses space-time coding, including diversity gain, the encoding and transmission order, combining methods and the maximum likelihood decision rule for two-branch transmit diversity with one or several receivers. Ultra wideband radio is treated in depth, from multiple access over Gaussian channels and M-ary modulation to coded schemes, multiuser detection and beamforming. Antenna array processing is also covered, with attention to space-time receivers for CDMA, MUSIC and ESPRIT direction-of-arrival estimation, joint combining with MLSE receivers, channel estimation and reducing complexity in wideband beamforming. Finally, channel modeling and measurement, adaptive medium access control, adaptive routing and the TCP layer are discussed.

The aim is to help readers understand how performance, complexity, reliability and cost depend on one another, and how existing and emerging technologies shape receiver design. It is intended for those following current approaches and developing directions in personal and indoor wireless communication.