Mainlobe Deceptive Jammer Suppression Based on Quadratic Phase Coding in FDA-MIMO Radar

Abstract

In this paper, the problem of mainlobe deceptive jammer suppression is solved with the frequency diversity array-multiple-input multiple-output (FDA-MIMO) radar system. At the modeling stage, based on the FDA-MIMO radar, a quadratic phase code (QPC) is applied along the slow time dimension in the transmit array. In the receiver, after decoding and principal range compensation, the true and false targets that are generated in an identical angle, can be discriminated in the joint transmit-receive-Doppler frequency domain. Particularly, the false targets are equivalently moved from the mainlobe to the sidelobes in the transmit spatial frequency domain. Then, by performing the data-dependent transmit-receive-Doppler three-dimensional beamforming, the false targets are suppressed owing to Doppler and range mismatches. Moreover, by moving the jammers to nulls in the Doppler frequency domain, the capability in terms of the maximum number of suppressible jammers can be strengthened with an appropriate coding coefficient and frequency increment. Numerical results can certify the suppression capability of the QPC-FDA-MIMO radar.

Moving-Target Detection for FDA-MIMO Radar in Partially Homogeneous Environments

“…The FDA-MIMO radar has a wide range of applications, including secure physical layer communications [11], high-resolution and wide-swath synthetic aperture radar (HRWS-SAR) imaging [12,13], SAR deceptive jamming rejection [14][15][16], and more. By discriminating echoes at different distances, the mainlobe interferences [17], mainlobe clutter [18], main-beam deceptive jamming [9,10,17,[19][20][21], etc., can be effectively suppressed using the FDA-MIMO-based range information.…”

Joint Design of Complementary Sequence and Receiving Filter with High Doppler Tolerance for Simultaneously Polarimetric Radar

“…According to the principle of stationary phase, the orthogonality between the positive and negative slope LFM waveform is limited by the time-bandwidth product [19]. In recent years, phase-coded waveforms (PCWs) with good orthogonality are attractive for multichannel radar, such as SPR and MIMO (multiple-input-multiple-output) radar [7,[20][21][22]. In [15,23], Stoica et al proposed a series of cyclic algorithms for minimizing the integral sidelobe level (ISL) of unimodular waveforms, including cyclic algorithm-pruned (CAP), CA new (CAN), weighted CAN (We CAN), and CA direct (CAD).…”

A Method to Suppress Interferences Based on Secondary Compensation with QPC-FDA-MIMO Radar

“…It incorporated range-domain information of targets into the transmitted steering vector, enabling the system to have range dimensional degrees-of-freedom (DOFs) [27][28][29][30][31][32][33]. By combining multiple-input-multiple-output (MIMO) technology, adaptive and non-adaptive beamforming methods could effectively suppress mainlobe deceptive interference with the spatial frequency differences from the targets [34][35][36][37][38]. Moreover, the suppression method encoding both the array elements and the pulses with Element-Pulse Coding (EPC) could effectively counter mainlobe deceptive interference with range ambiguity [39][40][41].…”