Abstract A multiple‐input multiple‐output (MIMO) radar with frequency diverse array (FDA) produces a range‐angle‐dependent steering vector, which can suppress the deceptive jamming in joint range‐angle domain. This turn complicates task of jamming. With emergence and development digital radio memory (DRFM), electronic technique has entered age coherent Based on analysis superiority FDA‐MIMO cancelling jammers, novel range gate pull‐off method via DRFM against is proposed. Compared...

Frequency diverse array multiple-input multiple-output (FDA-MIMO) radar solves the problem of angle pointing and range during beam transmission due to its unique range-angle dimension dependent, which gives it good characteristics against main lobe deceptive jamming. Moreover, current single jamming is easy be identified cannot form an effective effect on FDA-MIMO radar. To address this problem, paper proposes a compound method suppression beamforming. Compared with traditional method, can...

A space-based bistatic radar system composed of two radars as the transmitter and receiver respectively has a wider surveillance region better early warning capability for high-speed targets, it can detect focused space targets more flexibly than monostatic or ground-based system. However, target echo signal is difficult to process due motion both targets. To be specific, will encounter problems Range Cell Migration (RCM) Doppler Frequency (DFM), which degrade long-time coherent integration...

Reasonable allocation of space-based radar resources is a crucial aspect improving the accuracy space multi-target tracking and enhancing spatial awareness. The conventional resource algorithm fails to exploit high dynamic cross-section (RCS) characteristics, resulting in poor robustness, divergence, or even loss tracking. However, RCS targets fluctuates considerably actual scenarios, which cannot be disregarded for target tasks. To address this issue, we propose an adaptive method that...

Approaching space target tracking is a typical and challenging mission in the situational awareness (SSA) field. As space-based radar able to monitor targets of interest full-weather all-time, system utilized this paper. However, most multi-target (MTT) filters studies merely utilize location or narrow measurements, many potentially valuable electromagnetic scattering characteristics are missed, which leads false problems. The transmits wide-band signal, measured high-resolution range...

Discrimination of approaching multiple space targets is a challenging task for situational awareness (SSA). Compared with ground-based radars, space-based radars cover better coverage and they have no restriction on the curvature earth. In this paper, we utilize radar to track objects in space. Note that cross section (RCS) characteristics Doppler information are typical potential target individual features improve tracking performance SSA tasks. However, one limitations utilizing RCS...

Abstract By analyzing the discontinuous character in time domain, a jamming suppression method is propose to counter Interrupted sampling reperter jamming(ISRJ, which an effective coherent wide-band linear frequency modulation signal. The of ISRJ and instantaneous change rule after stretch firstly analyzed. Secondly, by controlling adjustment parameters, generalized S transform utilized obtain time-frequency grayscale image received Then, can be segmented using genetic algorithm construct...

Since the beampattern has characteristics of range-angle dependence, frequency diverse array multiple-input multiple-output (FDA-MIMO) radar a good application prospect. There have been many studies to improve performance by optimizing offset. However, on basis fully understanding time parameters, relationship between element offset and still needs be clarified. Based new FDA-MIMO framework, this paper presents an analytical solution beampattern, which removes influence parameter. Taking...

The frequency diverse array (FDA) can provide degrees of freedom in both the range and angle domains by controlling offset across adjacent elements. Nevertheless, time-variant problem affects analysis application FDA, there is a notable lack research on receivers multicarrier FDA. In this paper, novel perspective to understand factor time parameter proposed. Furthermore, combined with multiple input output scheme, two FDA radar are proposed obtain time-invariant dot-shaped beampattern....

Frequency diverse array-multiple-input multiple-output (FDA-MIMO) radar makes it transmit beam range–angle two-dimensional freedom by attaching a small frequency offset increment between the array elements. With widespread use of digital radio memory (DRFM) technology, is able to delay false target any range bin and doppler unit delaying forwarding transmits signals, resulting in deceptive jamming effect dimension. To this end, based on research existing main-lobe interference methods, paper...

The hybrid of the frequency diversity array (FDA) radar and multiple-input multiple-output (MIMO) radar, namely, FDA–MIMO provides more degrees freedom improves overall performance system. essence transmitting subaperture design is to divide transmit into multiple subapertures improve interference suppression capability radar. Among them, orthogonal waveforms are transmitted between each subaperture, element inside transmits same waveform. Aiming at problem how affects its performance, we...

Joint angle and range estimation can be realized using multi-carrier frequency diverse array (FDA) radar. However, many algorithms are implemented based on a large number of snapshots. As for one or few snapshots, the rank signal covariance matrix (SCM) will lost it may cause some decreases accuracy. To overcome this problem, we propose an SCM reconstruction method atomic norm minimization (ANM) convert ANM into semidefinite programming. By solving optimization is reconstructed. Moreover,...

Aiming at the problem of insufficient analysis influence self-defense jamming on radar measurement to determine target position, mean and standard deviation conversion error under different are derived. The angle distance errors analyzed, coordinate equation is used derive jamming. simulation results show that noise makes more random increases; deception produce a fixed error. It shows jamming, positioning by produces error, performance greatly affected. penetration success probability guaranteed.

During radar detection, the adaptive beamforming technique needs to create nulls resist interference. When interference appears within mainlobe, main detection beam will become distorted. To solve this problem, a new method for covariance matrix reconstruction is proposed mainlobe maintenance and worst-case performance optimization (WCPO) algorithm with enhanced waveform robustness obtained. Its integration performed over known region without target information obtain improved matrix, which...

Owing to the property of range-angle-dependent beampattern, frequency diverse array (FDA) has promising application potentials in radar field. Furthermore, combined with multiple-input multiple-output (MIMO) scheme, transmit waveform can be separated at receiver, which increase flexibility signal processing. However, degrees freedom (DOFs) FDA-MIMO cause higher requirements for efficiency adaptive beamforming algorithms. Hence, we propose an improved Two-Side Minimum Variance Distortionless...