A new criterion to jointly design the antenna and optimize the communication capacity in IR-UWB
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
IEEE Transactions on Communications
IEEE Transactions on Wireless Communications
Performance analysis of IR-UWB in a multi-user environment
IEEE Transactions on Wireless Communications
Achievable information rates of M-ary PPM impulse radio for UWB channels and rake reception
IEEE Transactions on Communications
α-stable interference modeling and cauchy receiver for an IR-UWB ad hoc network
IEEE Transactions on Communications
M-ary PPM for transmitted reference ultra-wideband communications
IEEE Transactions on Communications
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In ultra-wideband (UWB) communications based on time-hopping (TH) impulse radio, one of the most frequently studied receivers is the correlation receiver. The multiuser interference (MUI) at the output of this receiver is sometimes modeled as a Gaussian random variable. In order to justify this assumption, the conditions of validity of the Central Limit Theorem (CLT) have to be studied in an asymptotic regime where the number of interferers and the processing gain grow toward infinity at the same rate, with the channel degree being kept constant. An asymptotic study is made in this paper based on the so-called Lindeberg's condition for the CLT for martingales. Nonsynchronized users sending their signals over independent multipath channels are considered. These users may also have different powers. It is shown that when the frame length grows and the repetition factor is kept constant, then the MUI does not converge in distribution toward a Gaussian random variable. On the other hand, this convergence can be established if the repetition factor grows at the rate of the frame length. In this last situation, closed-form expressions for the signal-to-interference-plus-noise ratio (SINR) are given for TH pulse amplitude modulation (PAM) and pulse position modulation (PPM) UWB transmissions