Study and Mitigation of Non-Cooperative UWB Interference on Ranging.

UWB localization systems are well known for their accuracy for indoor localization. Recently UWB-based localization systems with less than 5 cm error have been proposed. Since IEEE802.15.4-11 standard only allows UWB signal transmission with very low power (-41.3 dBm/MHz), UWB systems cannot utilize carrier sensing techniques to manage shared access to the wireless channel. In this paper, first, we studied the likelihood of wideband interference in localization applications and also analyzed the impact of interference on ranging performance. Then, we design and evaluate RAPSI (Random Pulse Shape Identification), a simple yet effective technique to detect and mitigate the ranging error caused by interference. Our results show 30% to 40% reduction in ranging errors caused by wideband interference after applying the proposed techniques.