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A b s w b I n this paper, the performance and capacity of an Ultra-Wideband (UWB) communication system with multiple receive antennas are investigated. We cousider Pulse Amplitude Modulation (PAM) and Pulse Position Modulation (PPM). It is shown that the communication distance and system performance are improved by employing multiple receive antennas.

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In this paper, we propose a new modulation scheme called biorthogonal pulse position modulation (BPPM) for ultra-wideband (UWB) communication systems. The BPPM signals are constructed from orthogonal pulse position modulation signals. The channel capacity and error probability of BPPM are determined for a timehopping UWB communication system. It is shown that N-ary BPPM has better performance than N-ary PPM with the same throughput and half the computational complexity.