Interference mitigation study for the coexistence of bi-phase UWB and multi-band OFDM

摘要

Ultra wideband (UWB) is an effective technique that enables coexistence with other radio systems using very short pulses and spread spectrum. Multi band orthogonal frequency division multiplexing (MB-OFDM) is inferentially proposed for personal area networks as well as pulse-based UWB. According to the FCC, both systems is used in same band from 3.1 GHz to 10.6 GHz. This paper discusses the effects of interference between pulse-based UWB (p-UWB) and MB-OFDM. The bit-error rate performance is shown assuming that p-UWB and MB-OFDM are utilized at close range. To mitigate the effects of interference from MB-OFDM to p-UWB, multi-carrier template wave techniques and MB-OFDM band sensing in the p-UWB are proposed. These techniques are found effective for the coexistence of both systems.