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Orthogonal MIMO radar waveform design

Author: LvHongFen
Tutor: ZhangZiJing
School: Xi'an University of Electronic Science and Technology
Course: Signal and Information Processing
Keywords: MIMO radar Chirp signal Orthogonal polyphase code Genetic Algorithms Greedy algorithm White noise signal Chaotic signals
CLC: TN958
Type: Master's thesis
Year: 2011
Downloads: 186
Quote: 3
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Abstract


Multiple-input multiple-output (MIMO) radar is a new radar system refers to a plurality of transmitting antennas and a plurality of quadrature signals received echo signal receiving antennas . MIMO radar can effectively improve the radar 's anti-interception performance, improve detection of low clutter targets , improve strength clutters the ability to detect weak target . MIMO radar in order to avoid mutual interference between the channels , so as to obtain a larger spatial diversity gain , required transmission signal which is orthogonal to each other , which means between the transmitted signal should have a small cross-correlation value . Meanwhile , MIMO radar distance in order to obtain a higher resolution , requires the transmitted signal should have a low autocorrelation sidelobes . Since mutually orthogonal MIMO radar signal, so designed with low autocorrelation sidelobes and low cross-correlation of the quadrature signal is a MIMO radar and the key issues. This article first orthogonal linear FM signal design ; followed by auto-correlation peak sidelobe square , the square and the cross-correlation peak autocorrelation and cross-correlation energy cost function , the application of genetic algorithms and greedy algorithm hybrid optimization algorithm to search for positive AC polyphase codes were carried out four phases and 32 phase polyphase code design . And relaxation of the autocorrelation main lobe width , design phase quadrature with 32 yards and a random phase polyphase orthogonal polyphase code design . Simulation results show the effectiveness of the above variety of design and feasibility . Finally, white noise and chaotic signals , and find that it can be used as MIMO radar transmit signal , the simulation show its feasibility.

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