Analysis of Interference Effects in MB-OFDM UWB Systems

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 twotone 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.

• Type: Conference
• Year: 2008
• Where: WCNC
• Authors: Yanmei Li, Jan M. Rabaey, Alberto L. Sangiovanni-Vincentelli
• Keywords: Interference Distortion Products, MB-OFDM UWB Systems, Traditional Twotone Technique, WCNC 2008, Wireless Networks