Time reversal signal processing for communication.

Young, Derek P. ; Jacklin, Neil ; Punnoose, Ratish J. ; Counsil, David T.

关键词: ALGORITHMS;    ANTENNAS;    FOCUSING;    PERFORMANCE;    PROCESSING;    REFLECTION;   

DOI  :  10.2172/1030259
RP-ID  :  SAND2011-7050
PID  :  OSTI ID: 1030259
Others  :  TRN: US201201%%289

学科分类：社会科学、人文和艺术（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Time-reversal is a wave focusing technique that makes use of the reciprocity of wireless propagation channels. It works particularly well in a cluttered environment with associated multipath reflection. This technique uses the multipath in the environment to increase focusing ability. Time-reversal can also be used to null signals, either to reduce unintentional interference or to prevent eavesdropping. It does not require controlled geometric placement of the transmit antennas. Unlike existing techniques it can work without line-of-sight. We have explored the performance of time-reversal focusing in a variety of simulated environments. We have also developed new algorithms to simultaneously focus at a location while nulling at an eavesdropper location. We have experimentally verified these techniques in a realistic cluttered environment.