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Exact evaluation of M-ary TH-PPM UWB systems on AWGN channels for indoor multiple-access communications

Exact evaluation of M-ary TH-PPM UWB systems on AWGN channels for indoor multiple-access communications

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Analysis of ultra-wideband (UWB) time-hopping spread-spectrum code division multiple-access system using binary PPM signaling has been considered previously. However, the representation of the multiple-access interference was based on assuming Gaussian random processes that resulted in inaccuracies in some scenarios. This analysis was improved by a more precise statistical analysis that dispensed with approximations based on using Gaussian process statistics. In the paper, this precise statistical analysis is extended for general M-ary PPM UWB modulations. Performance metrics of symbol error rate and capacity are evaluated. It is shown that there is a significant error in using the Gaussian approximation as it overestimates the capacity of the M-ary PPM modulation.

Inspec keywords: pulse position modulation; channel capacity; statistical analysis; radiofrequency interference; random processes; indoor radio; approximation theory; ultra wideband communication; AWGN channels; multi-access systems

Other keywords: UWB system; M-ary TH-PPM; symbol error rate; Gaussian random process; indoor multiple-access communication; multiple-access interference; approximation; AWGN channel; statistical analysis; time-hopping pulse position modulation; channel capacity

Subjects: Multiple access communication; Other topics in statistics; Modulation and coding methods; Interpolation and function approximation (numerical analysis); Electromagnetic compatibility and interference; Mobile radio systems

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