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Because the performance of traditional Gaussian cognitive radar(CR) system for target response varying from Gaussian will be degraded, this paper extended the Gaussian target response to arbitrary non-Gaussian target distribution. In this paper, the CR multiple hypothesis classification algorithm was used for non-Gaussian targets, and the sparse spectrum of correlated narrowband target responses was...
It is required for the Cognitive Over-the-Horizon-Radar (COTHR) to deepen the cognition of the ionosphere environment. The current model of the ionosphere structure cannot satisfy this requirement. In this paper, the dispersion effect is introduced into the ionosphere fine structure and the space-time-frequency fine structure model of the ionosphere is proposed. Simulation results testify the validity...
In recent years, the cognitive radar (CR) with waveform diversity has exhibited significant performance improvements over the traditional fixed waveform radar and has become an area of vigorous research and development. A novel waveform selection strategy based on wind driven optimization (WDO) technique is proposed in this paper. Firstly, the predicted tracking Cramér-Rao Lower Bounds (CRLB) model...
In order to solve the problem of large energy spectral density error of the constant modulus waveform synthesized by Cognitive radar. A new waveform design algorithm based on iterative Convex Optimization is proposed in this paper. Firstly, waveform synthesis method is transformed into Optimization problem constrained by peak-to-average power ratio, while classical synthesize algorithm optimize cost...
In traditional adaptive nulling antennae, the beam-nulls come into being perfectly for stationary jamming signals. But their ability of nulling will be severely weakened for nonstationary jamming signals so that the target detection performance becomes worse for radar. In this paper the new conception of time-direction pattern for radars is introduced, in which the information for direction change...
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