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Canonical space-time processing for wireless communications

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3 Author(s)
E. N. Onggosanusi ; Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA ; A. M. Sayeed ; B. D. Van Veen

A canonical space-time characterization of mobile wireless channels is introduced in terms of a fixed basis that is independent of the true channel parameters The basis captures the essential degrees of freedom in the received signal using discrete multipath delays, Doppler shifts, and directions of arrival (DOA). The canonical representation provides a robust representation of the propagation dynamics and eliminates the need for estimating delay, Doppler and DOA parameters of different multipaths, Furthermore, it furnishes a natural framework for designing low-complexity space-time receivers. Single-user receivers based on the canonical channel representation are developed and analyzed, It is demonstrated that the resulting canonical space-time receivers deliver near-optimal performance at substantially reduced complexity compared to existing designs.

Published in:

IEEE Transactions on Communications  (Volume:48 ,  Issue: 10 )