Joint Design of Colocated MIMO Radar Constant Envelope Waveform and Receive Filter to Reduce SINR Loss

Abstract

In this paper, we aim at the problem that MIMO radar’s target detection performance is greatly reduced in the complex multi-signal-dependent interferences environment. We propose a joint design method based on semidefinite relaxation (SDR), fractional programming and randomization technique (JD-SFR) and a joint design method based on coordinate descent (JD-CD) to solve the actual transmit waveform and receive filter bank directly to reduce the loss of strong interference to the output signal-to-interference-plus-noise ratio (SINR) of the radar system. Therefore, the maximization of output SINR is taken as the criterion of the optimization problem. The designed waveforms take into account the radar transmitter’s hardware requirements for constant envelope waveforms and impose similarity constraints on the waveforms. JD-SFR uses SDR, fractional programming and randomization technique to deal with the non-convex optimization problems encountered in the solution process. JD-CD transforms the optimization problem into a function of the phase of the waveform and then solves the transmit waveform based on CD. Compared with other methods, the proposed method has lower output SINR loss under strong power interference and forms deep nulls on the direction beampattern of multiple interference sources, which indicates that it has better anti-interference performance.

Moving target detection and tracking with multiplatform radar network (MRN)

“…Due to the limitation of time and space, readers interested in transmit waveform and receive filter design for CMR are referred to Appendix A in Ref. [28] and the references therein for more details. The block diagram of the cognitive radar is illustrated in Figure 2.…”

Comprehensive mPoint: A Method for 3D Point Cloud Generation of Human Bodies Utilizing FMCW MIMO mm-Wave Radar

“…Compared to the above sensors, the millimeter-wave radar sensor has the advantages of long-range capabilities, low cost and the ability to work in non-line-of-sight situations, such as through building walls and clothes [4,13,14]. It was proved that the mm-wave radar is robust against non-line-of-sight interference including foam, plastic, etc., with less than 1% change in point-cloud density [15].Moreover, it is a form of non-intrusive technology and does not cause privacy issues, which is particularly valuable [16].…”