Signal processing in passive radar with multi-user MIMO-OFDM signal

Abstract In this paper, we propose a signal processing method in passive radar using the multi-user (MU) multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) as illuminator of opportunity. The MU-MIMO-OFDM modulation is adopted fifth-generation (5G) communication. We consider scenario where multiple mobile users share same time–frequency resources but separate spatially different beams formed prior by MU-MIMO transmitter antenna array, which quite general case realistic 5G A beam-by-beam matched filter proposed for weak target sensing. Interference suppression also discussed. interference more complicated than that traditional radar. communication system, base station (BS) transmits signals to beam regions simultaneously between BS and users. For specific region receiver located, consists not only direct multipath (DMI) transmitted region, inter-user (IUI) from other regions. DMI IUI degrade detection capability significantly. jointly eliminating IUI. Simulations verify effectiveness these methods.