A novel zonal UWB receiver with superior performance
IEEE Transactions on Communications
Performance evaluation of impulse radio UWB systems with pulse-based polarity randomization
IEEE Transactions on Signal Processing
IEEE Transactions on Wireless Communications
A pulse design paradigm for ultra-wideband communication systems
IEEE Transactions on Wireless Communications
Performance of ultra-wideband communications in the presence of interference
IEEE Journal on Selected Areas in Communications
IEEE Transactions on Communications
Wireless Personal Communications: An International Journal
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It is well known that the Gaussian distribution is not an accurate model for approximating the probability density function (PDF) of the multiple access interference (MAI) in time-hopping UWB (TH-UWB) systems. An exact theoretical model which explains the key features of the PDF of the MAI in THUWB systems is discussed. These features, which can be precisely anticipated by the proposed model include impulses, singularities, and the tail behaviour in the distribution of the MAI. The model reveals in quantitative terms why a Gaussian approximation for the MAI in TH-UWB systems is highly imprecise even in an environment with a large number of independent interferers. Based on the model obtained for the PDF of the MAI and exploiting the maximum a posteriori (MAP) receiver design rule, the optimal attainable BER performance of binary TH-UWB receivers in additive white Gaussian noise channels is numerically determined. The performances of some recently proposed UWB receivers are benchmarked against the optimal performance showing that some of them achieve near-optimal performance.