| UP | DOWN | ||
|---|---|---|---|
| Adaptive Reduced-Rank MIMO Decoder for Military Communications | |||
| Honan,Patrick | Digital Design Solutions,Inc./Stevens Institute Of Technology | ||
| Cao,Zhongren | University of California, San Diego | ||
| Tureli,Uf | Stevens Institute of Technology | ||
| We propose an adaptive reduced-rank solution for decoding spatial multiplexed multiple-input multiple-output (MIMO) wireless communications based on the multi-stage Wiener filter (MSWF). Spectral efficiency gains promised by spatial multiplexing schemes, such as vertical Bell Labs space time (V-BLAST) and space-division multiple access (SDMA), are difficult to realize for military applications where extreme channel conditions such as co-channel interference and intentional jamming can be expected. We show that the MSWF combined with successive interference (SIC) for spatial demultiplexing leads to significant signal subspace compression or rank-reduction. We propose for the MSWF-SIC a novel rank-reduction stopping rule that adapts to channel correlation and interference converges much faster than full rank methods permitting shorter training length and robustness to co-channel interference and jamming. Also, significant computational reduction is realized making this method a good candidate for portable applications where computational resources are limited. Bit error rate (BER) versus SNR for the correlated channel and for co-channel interference and SINR versus the MSWF rank-reduction and length of training interval are presented. | |||
| Dr. Honan has extensive experience as an architect and developer of advanced signal processing solutions for tactical comm and sensing application, and, as a senior architect at Flarion Technologies, for a commercial OFDM application. In addition, he has numerous IEEE publications that propose sensor field, MIMO and OFDM processing solutions. Dr. Honan is a recipient of the 2000 BAE Systems PhD Fellowship and 1990 Grumman Aerospace Masters Fellowship. He completed his PhD from Stevens Institute Of Technology in the spring of 2004. Dr. Honan recently founded Digital Design Solutions Inc., and as ARL/SLAD consultant he is currently focused on improving, for the new generation of tactical networked radios, comm effectiveness in an EW environment. | |||