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Target-Adaptive Matched Illumination (MI) Radars work on targets which can be resolved into multiple discrete scattering centers. Plurality of scattering centers depend on the physical extent and orientation of the target, the range resolution capabilities of the radar and its operating frequency. Increasing the radar range resolution reduces the amount of backscattered energy per discrete range cell,...
An adaptive (or cognitive) radar operates by sensing the environment and accordingly adopts an optimal transmit-receive structure. To this end, in the literature, matched illumination (MI) principles have been investigated to realize this concept, algorithms have been developed for the different components in such radars, and the entire framework validated through numerical simulations. However, these...
Matched illumination (MI) radar signals provide improved target signal to interference noise ratios (SINR) and better spread ambiguity function performance compared to conventional radar in the presence of range-spread targets. Performance improvements reported in literature are based on the assumption of perfect knowledge of responses of the extended targets as well as interference spectra. In this...
Ambiguity functions (AFs) are obtained for a radar using matched illumination (MI) transmit signals for the detection of range-spread targets in the presence of clutter. The transmit signals are adapted to target and interference spectra and are filtered optimally in the receiver; they are designed to maximize signal-to-interference-and-noise ratio (SINR) power ratios at receiver output. In this paper,...
Built In Test Equipments are used to simulate targets to check functionality of different subsystems and the performance (like ECCM) of the radar as a whole. We present an Field Programmable Gate Array (FPGA) based design of a Generic Multilevel Built In Test Equipment (BITE) capable of simulating target echo at Intermediate Frequency (IF), Radio Frequency (RF) levels and at Field. The design also...
Various modulation techniques are usually utilized to enhance the radar performance, or to add more capabilities to the radar that otherwise would not have been possible. Digital generation methods of frequency modulated continuous wave signals include direct waveform synthesis and frequency synthesis. The implementation of waveform generation and upconversion method are described in this paper with...
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