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- Type of Document: Ph.D. Dissertation
- Language: Farsi
- Document No: 44424 (05)
- University: Sharif University of Technology
- Department: Electical Engineering
- Advisor(s): Nayebi, Mohammad Mehdi
- Abstract:
- Military radars are mainly deployed to detect and track targets. They must be capable of working in dense environments where noise and clutter are also very likely present. Radars benefiting from random signals and especially noise radars can fulfill this goal. The transmitted signal in noise radar is a (modulated or unmodulated) noise signal; and it is what makes its performance superior to the conventional CW, FM and FM/CW radars, namely unambiguous range and Doppler measurement, robustness to noise, Low Probability of Detection and Interception (LPD and LPI), high Electro Magnetic Compatibility (EMC), inherent ECCM and CESM nature and thumbtack ambiguity function. In this thesis, different variants of noise radars, their compliant processing methods along with the problems a designer might face, are investigated. One of the most critical issues in noise radar are sidelobes resulted from correlation known as masking effect, which effectively limits the radar performance. In this dissertation a novel way of designing random waveform with potentially infinite length is proposed. Using this signal and needless of any modifications at receiver end, sidelobe level is suppressed while the randomness of radar signal remains intact.
- Keywords:
- Noise Radar ; Correlation Sidelobes ; Waveform Design ; Graph Theory
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