Time reversal techniques for broadband wireless communications

Channels with large delay spreads, which typically arise when large bandwidths are used, are considered as disadvantageous for wireless communications. However, despite their challenges, these channels also offer opportunities. The
application of time reversal techniques may be one possibility to exploit these advantages and to make communications in channels with large delay spreads more feasible. This paper describes advantages and draw backs of time reversal techniques in broadband wireless communications, and outlines concepts, goals and potential improvements. The properties of time reversal in various simulated and measured wireless channels are demonstrated, and system design is discussed.