Performance Analysis of Ultra-Wideband Spatial MIMO Communications Systems

The performance of an ultra-wideband multipleinput-multiple-output (MIMO) communications system is experimentally evaluated. Using 3x3 indoor channel measurements, it is demonstrated that the MIMO subchannels are highly uncorrelated, with correlation coefficients lower than 0.45. Eigenvalue decomposition further confirms the channel independence. A linear gain in outage capacity is demonstrated. A spectral efficiency of 15.5 b/s/Hz is obtained, compared to 3 b/s/Hz for narrowband SISO. Thus a full-band tri-element UWB system can yield a 1% outage capacity of up to 184.5 Gbps. Keywords—Capacity, correlation, MIMO, multiple antenna, spectral efficiency, ultra-wideband (UWB).

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