الفهرس 
A Simple Transmit Diversity Technique for Wireless CommunicationsOnly 14 pages are availabe for public view
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Abstract
With the integration of Internet and multimedia applications in next generation wireless communications, the demand for wide-band high data rate communication services is growing. As the available radio spectrum is limited, higher data rates can be achieved only by designing more efficient signaling techniques. Recent research in information theory has shown that large gains in capacity of communication over wireless channels are feasible in multiple-input multiple output (MIMO) systems. The MIMO channel is constructed with multiple element array antennas at both ends of the wireless link. Space-time coding is a set of practical signal design techniques aimed at approaching the information theoretic capacity limit of MIMO channels. The fundamentals of space-time coding have been established by Tarokh, Seshadri and Calderbank in 1998. Space-time coding and related MIMO signal processing soon evolved into a most vibrant research area in wireless communications.
Space-time coding is based on introducing joint correlation in transmitted signals in both the space and time domains. Through this approach, simultaneous diversity and coding gains can be obtained, as well as high spectral efficiency. The initial research focused on design of joint space-time dependencies in transmitted signals with the aim of optimizing the coding and diversity gains. Lately, the emphasis has shifted towards independent multi antenna transmissions with time domain coding only, where the major research challenge is interference suppression and cancellations in the receiver.