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Research on Resolving Ability of Coherent MIMO Radar

Author: LiTeng
Tutor: FuQiang；ZhouJianXiong
School: National University of Defense Science and Technology
Course: Information and Communication Engineering
Keywords: Coherent type MIMO Frequency diversity Equivalent aperture Ambiguity function Beamforming Space high-resolution Array element configuration STAP Clutter suppression Detection performance
CLC: TN958
Type: Master's thesis
Year: 2010
Downloads: 76
Quote: 0
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Abstract


MIMO (Multiple-Input Multiple-Output) radar is to use a plurality of transmitting antennas collaborative transmission diversity detection waveform, and synchronous reception using a plurality of receiving antennas, the joint processing of the echo signal a new radar. Unlike conventional radar, the radar system can be multidimensional detect the target and to obtain a more comprehensive, more essential target information. Some studies suggest that: MIMO system has great potential to improve target detection, tracking, identification and parameter estimation performance of the radar system; addition, the basic structure of the characteristics that make flexible transmit waveform design and bistatic radar system in the configuration more flexible, more conducive to meet the needs of a variety of tactics. Academia in accordance with the diversity gain access distance and antenna configuration size MIMO radar statistics and coherent two categories, the paper focuses on a coherent MIMO radar, focused on radar systems, signal processing and target resolving power research. Its main tasks are the following First of all, from the coherent MIMO radar picket close, the basic characteristics of the starting signal coherent processing, and pointed out the similarities and differences of this type of radar and phased array radar, and were studied coherent MIMO radar The system model, the channel matrix and array characteristics. On this basis, the paper illustrates the basic principle of frequency diversity orthogonality condition and MIMO radar synthetic equivalent of a large aperture array. Then, based on the inherent characteristics of MIMO radar bistatic establish the model of bistatic radar and and clear geometric relationship of the array and the target space. Examine the viewing angle and signal parameters of the target position, angle, speed, the ability to distinguish, derivation and discussion of the ambiguity function of frequency diversity signals, lay a preliminary theoretical foundation for the follow-up study. Further, for MIMO radar emission frequency diversity signal, a signal processing method. The method at the receiving end of the emission angle and the receiving angle beamforming, joint matched filter on the diversity signal in the distance dimension. The simulation studies in an ideal environment the different emission bandwidth of the signal and the configuration of the array element on the target space the ability to distinguish qualitatively given space high resolution MIMO radar system configuration principle. Finally, the frequency diversity MIMO radar echo signal model of non-ideal environment to explore the full use of the characteristics of MIMO radar and space-time adaptive techniques to suppress clutter detection of the target location. MIMO radar and phased array applications STAP system gain by simulation that the performance advantages of MIMO radar detection of targets from clutter environment and receiver miniaturization potential applications.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radar > Radar: institutional sub-
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