Realistic time reversal and spatial beamforming: An interference mitigation approach

In this paper a new time domain approach which combines time reversal (TR) and downlink spatial beamforming (BF) is proposed that can result in WB/UWB Interference Mitigation (IM). In order to design the TR filter and the desired beams, the Channel State Information (CSI) between the UWB system and the other wideband (WB) victim users is required. This information is obtained using a hybrid Electromagnetic (EM) Ray-tracing Ultra Wideband (UWB) simulation technique. This deterministic simulation tool transfers complex antenna transfer function determined by EM simulations into the ray-tracing tool in order to derive a real-world description of the wireless channel. The central goal of this paper is to develop a concept of IM technique for composite heterogeneous networks where real world aspects and deterministic CSI are taken into account. The enhancement of applying IM techniques for achieving successive UWB coexistence will be illustrated.