Performance of coherent and noncoherent receivers for UWB communications

In this paper we present a comparison between coherent and noncoherent UWB receivers, under a realistic propagation environment, that takes into account also the effect of path-dependent pulse distortion. As far as coherent receivers are concerned, both maximal ratio combining (MRC) and equal gain combining (EGC) techniques are analyzed, considering a limited number of estimated paths. Furthermore, two noncoherent schemes are presented: a simple differential detector and its adaptive version. While the first receiver shows a significative performance loss, if compared to coherent detectors, the second one is able to guarantee probability of error similar to the one obtained employing a Rake receiver, equipped with up to 20 fingers, without requiring channel estimation.

[1]  Rodney A. Kennedy,et al.  Performance of RAKE Reception for Ultra Wideband signals in a Lognormal-fading Channel , 2003 .

[2]  Fumiyuki Adachi,et al.  Decision feedback multiple-symbol differential detection for M-ary DPSK , 1993 .

[3]  Robert C. Qiu,et al.  A study of the ultra-wideband wireless propagation channel and optimum UWB receiver design , 2002, IEEE J. Sel. Areas Commun..

[4]  Moe Z. Win,et al.  Evaluation of an ultra-wide-band propagation channel , 2002 .

[5]  Wayne E. Stark,et al.  Performance of ultra-wideband communications with suboptimal receivers in multipath channels , 2002, IEEE J. Sel. Areas Commun..

[6]  Bartosz Mielczarek,et al.  Performance of Coherent UWB Rake Receivers using Different Channel Estimators , 2003 .

[7]  Umberto Mengali,et al.  Channel estimation for ultra-wideband communications , 2002, IEEE J. Sel. Areas Commun..

[8]  G. R. Aiello,et al.  Ultra-wideband wireless systems , 2003 .

[9]  Sergio Benedetto,et al.  Performance evaluation and comparison of different modulation schemes for UWB multiaccess systems , 2003, IEEE International Conference on Communications, 2003. ICC '03..

[10]  J. Foerster,et al.  Channel modeling sub-committee report final , 2002 .

[11]  Moe Z. Win,et al.  Performance of low-complexity RAKE reception in a realistic UWB channel , 2002, 2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333).

[12]  Raymond Knopp,et al.  On the achievable rates of ultra-wideband PPM with non-coherent detection in multipath environments , 2003, IEEE International Conference on Communications, 2003. ICC '03..