Proceedings of the V IEEE Signal Processing Workshop on Signal
Processing Advances in Wireless Communications
Necessary and Sufficient Conditions for Perfect Channel
Shortening and Implications for Interference Mitigation
J.M. Walsh, R.K. Martin, A.G. Klein, N.S. Xenias, J.A. Pagnotta, and
C.R. Johnson, Jr.
Abstract
We explore the shortening of multiple channels arising from either
over-sampling or from using multiple antennas between a single transmitter
and receiver. Using terminology we develop, we give new necessary and
sufficient conditions for perfect channel shortening (PCS). In an
example, the perfect channel shortener's robustness against wide-band
noise, narrow-band interferers, and received signal SNR mis-measurement
is compared to that of an imperfect channel shortener. The work concludes
with a list of possible extensions of the results and future work.
