Information Theory and Reliable Communication
Information Theory and Reliable Communication
A channelized digital ultrawideband receiver
IEEE Transactions on Wireless Communications
Performance of ultra-wideband communications in the presence of interference
IEEE Journal on Selected Areas in Communications
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In this paper the sampling, quantization and processing of an ultra-wideband (UWB) impulse radio (IR) receiver signal is considered when the propagation link is subjected to additive white Gaussian noise (AWGN) and narrow band interference (NBI) which may be non-Gaussian. The Neyman Pearson log likelihood ratio formulation results in receiver processing that consists of a Generalized Matched Filter (GMF) and linear sampling which exploits the correlation of the NBI noise to effectively suppress it. However, the processing requirements to implement the GMF are prohibitive in the context of an UWB IR. Hence an alternate highly efficient processing scheme based on crude 2 and 3 level quantization with maximum ratio combining (MRC) Rake processing is considered and analyzed. As demonstrated in this paper, the 3 level quantizer is an excellent compromise between receiver performance and computational efficiency and can in some cases exceed the performance of a comparable Rake receiver using linear sampling. This happens in some practical instances when the noise is non-gaussian as will be demonstrated.