Energy characteristics of UWB channel models applied to system design

The propagation of ultra-wideband (UWB) signals is a critical issue, which strongly impacts and even jeopardizes system costs and applications. This paper proposes a complete overview of energy distribution in UWB IEEE channel models. At first, realistic large scale parameters, such as path loss or fading margin, are considered for an accurate link budget analysis. Then, the energy repartition in the channel is modeled so as to specify optimal integration windows and detection performances in non-coherent receiver architectures based on energy collection for both communication and ranging requirements. Moreover, the expected voltage at antenna is analyzed in order to define the receiver sensitivity as a function of range. At last, we focus on auto and cross correlation of channel impulse responses for the purpose of estimating the multi-user capability. For each of the investigated items, some illustrating samples are provided and major implications for real UWB systems are derived and discussed.

[1]  B. Uguen,et al.  An impulse radio asynchronous transceiver for high data rates , 2004, 2004 International Workshop on Ultra Wideband Systems Joint with Conference on Ultra Wideband Systems and Technologies. Joint UWBST & IWUWBS 2004 (IEEE Cat. No.04EX812).

[2]  M. F. Fuller,et al.  Practical Nonparametric Statistics; Nonparametric Statistical Inference , 1973 .

[3]  P. Humblet,et al.  On the bit error rate of lightwave systems with optical amplifiers , 1991 .

[4]  Ian Oppermann,et al.  UWB Theory and Applications: Oppermann/UWB: Theory and Applications , 2005 .

[5]  A. Molisch,et al.  IEEE 802.15.4a channel model-final report , 2004 .

[6]  J. Keignart,et al.  Subnanosecond UWB channel sounding in frequency and temporal domain , 2002, 2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580).

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

[8]  Moe Z. Win,et al.  Characterization of ultra-wide bandwidth wireless indoor channels: a communication-theoretic view , 2002, IEEE J. Sel. Areas Commun..

[9]  Moe Z. Win,et al.  Impulse radio: how it works , 1998, IEEE Communications Letters.

[10]  S. Paquelet,et al.  An energy adaptive demodulation for high data rates with impulse radio , 2004, Proceedings. 2004 IEEE Radio and Wireless Conference (IEEE Cat. No.04TH8746).

[11]  J. Romme,et al.  On the relation between bandwidth and robustness of indoor UWB communication , 2003, IEEE Conference on Ultra Wideband Systems and Technologies, 2003.

[12]  S. de Rivaz,et al.  Performances analysis of a UWB receiver using complex processing , 2003, IEEE Conference on Ultra Wideband Systems and Technologies, 2003.

[13]  L. Ouvry,et al.  Performance analysis of LDR UWB non-coherent receivers in multipath environments , 2005, 2005 IEEE International Conference on Ultra-Wideband.