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University of Balamand > Academics > Research > Seminars > Jihad Daba

Improving the performance of wireless systems using diversity combining techniques in MIMO channels

Thursday, November 16, 2006 from 12:30 to 13:30 at Jacobo Auditorium

SUBMITTED BY: Dr. Jihad Daba
Faculty of Engineering
University of Balamand

ABSTRACT: Receiver diversity has been shown to improve mean signal strength and reduce signal level fluctuations in the fading channel. Combinational techniques such as Maximum Ratio Combination (MRC) or Equal Gain Combination (EGC) use the multiple signal branches that exist in the wireless channel advantageously by improving the antenna diversity and per-formance. MRC provides better performance than EGC, but the disadvantage of this technique is the complexity in its implementation since it requires SINR estimation algorithms. We introduce a novel combination technique termed Root Mean Square Gain Combination (RMSGC) that produces results superior to EGC and similar to MRC but with much less complexity at the receiver. We investigate the structure of this scheme using binary signalling and its performance is quantified in terms of theoretical and experimental bit error rate (BER) and a new QoS metric that captures the fading statistical fluctuation, termed signal-to-scattering noise ratio (SSNR).
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