Transmitted-Reference UWB: A Digital Approach

Ultra-wideband (UWB) transmission utilizing transmitted-reference (TR) reception suffers from excess noise due to noisy correlation. In this paper, a digital approach is adopted to perform TR reception, circumventing technical difficulties in analog bandpass filtering. A tradeoff between signal integrity and noise suppression is identified, and based upon it, a signal-to-noise ratio (SNR) optimization problem is formulated to characterize the performance of digital TR reception. Numerical simulation results for multipath UWB channels are presented. It is illustrated that with appropriate design of digital TR receivers, acceptable channel output SNR is achievable even without any repetition diversity as typically resorted to in previous results of analog TR receivers.

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