driven by the desire to enhance the spectral efficiency of wireless systems and bring them close to wireline systems quality in terms of mobile user service, mimo communications has recently attracted considerable interest. in ideal situations, a mimo channel allows constructing several parallel channels between the transmitter and receiver, which can be separated using signal processing means, and used for independent signaling. space-time processing for mimo communications includes: spatial beamforming and multiplexing techniques for attaining high rates; space-time coding techniques for mitigating channel fading; channel modelling and estimation techniques to enable coherent processing; and channel sounding and measurement methods for model validation, capacity estimation, and service provisioning. these are all critical components for the successful utilisation of mimo systems and the realisation of the capacity gains promised by information theory making this book essential reading for researchers, engineers and graduate students working in the field.