Title :
Analysis of Interference Effects in MB-OFDM UWB Systems
Author :
Li, Yanmei ; Rabaey, Jan M. ; Sangiovanni-Vincentelli, Alberto
Author_Institution :
Univ. of California, Berkeley
fDate :
March 31 2008-April 3 2008
Abstract :
The inter-modulation and cross-modulation products of interferences introduced by nonlinearities of the receiver could significantly degrade system performance, and should be properly estimated when determining system design specifications. In MB-OFDM UWB systems, the traditional two- tone technique is still widely used to estimate nonlinear effects. However, this technique is not accurate enough. In this paper, we analyze the interference effects and propose a statistical approach to estimate the interference distortion products accurately. The analytical expressions for various interference scenarios are derived and then validated by simulation. Based on this analysis, we demonstrate how to adjust the two-tone technique to provide accurate distortion estimations for MB-OFDM UWB systems.
Keywords :
OFDM modulation; distortion; estimation theory; interference; radio receivers; statistical analysis; ultra wideband communication; distortion estimations; interference distortion product estimation; interferences cross-modulation products; interferences inter-modulation products; multiband orthogonal frequency division multiplexing ultra-wideband system; receiver nonlinearities; statistical approach; system design specifications; two-tone technique; Analytical models; Communications Society; Degradation; Interference; Linearity; Narrowband; Nonlinear distortion; OFDM; Performance analysis; Wireless communication;
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1997-5
DOI :
10.1109/WCNC.2008.34
