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Method for generating MIMO (multiple-input and multiple-output) radar orthogonal polyphase code signals on the basis of genetic-tabu hybrid algorithm

A hybrid algorithm and signal generation technology, applied in computing, genetic modeling, special data processing applications, etc., can solve problems such as reducing algorithm convergence speed and tabu search algorithm search performance dependence.

Active Publication Date: 2015-06-17
HARBIN ENG UNIV
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Problems solved by technology

It has fast convergence speed and strong "mountain climbing" ability, but the search performance of the tabu search algorithm largely depends on the given initial solution
A better initial solution often makes the tabu search algorithm quickly converge to the global optimal solution, while a poor initial solution may greatly reduce the convergence speed of the algorithm

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  • Method for generating MIMO (multiple-input and multiple-output) radar orthogonal polyphase code signals on the basis of genetic-tabu hybrid algorithm
  • Method for generating MIMO (multiple-input and multiple-output) radar orthogonal polyphase code signals on the basis of genetic-tabu hybrid algorithm
  • Method for generating MIMO (multiple-input and multiple-output) radar orthogonal polyphase code signals on the basis of genetic-tabu hybrid algorithm

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Embodiment Construction

[0044] The generation of the MIMO radar orthogonal polyphase code of the present invention mainly includes the following aspects:

[0045] Step 1: Generate an initial population randomly. Give each parameter, set the number of iterations, population size, crossover probability, and mutation probability.

[0046] Step 2: Judge whether the stopping criterion of genetic algorithm is satisfied. If it is satisfied, output the result, otherwise continue with the following steps.

[0047] Step 3: Calculate the fitness function. Ideally, the orthogonal signal should satisfy the form that the autocorrelation function is an impact function, and the cross-correlation function is zero, that is

[0048] A ( φ l , k ) = 1 , k = 0 0 , - N k 0,0 k N - - - ( 2 )

[0049] and

[0050] C(φ p ,φ q ,k)=0, -N

[0051] Where p≠q and l,p,q=1, 2,...,L, A(φ l ,k) and C(φ p ,φ q ,k) are the aperiodic autocorrelation f...

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Abstract

The invention provides a method for generating MIMO (multiple-input and multiple-output) radar orthogonal polyphase code signals on the basis of genetic-tabu hybrid algorithm. The method includes: firstly, randomly generating an initial population; secondly, judging whether a stop criterion of genetic algorithm is satisfied or not; thirdly, calculating a fitness function; fourthly, selecting by proportional selection; fifthly, intersecting; sixthly, mutating by tabu search algorithm; seventhly, updating the population, and returning to the step 3 for continuing genetic algorithm with the new population. Transmission signals with fine self-correlation and cross-correlation can be designed, and polyphase code waveform designed by the method has fixed phase and is easy to generate and more suitable for practical application.

Description

Technical field [0001] The invention relates to a waveform generation method of a multiple-input multiple-output radar system. Background technique [0002] Multiple-input multiple-output (MIMO) radar is a new system radar with high detection performance based on multiple-input multiple-output technology in the communication field. MIMO radar is mainly divided into two types according to the antenna layout: centralized and distributed. The centralized MIMO radar transmits orthogonal signals at the transmitting end, and obtains the virtual array aperture through matched filtering technology at the receiving end, thereby obtaining greater system freedom and improving the spatial resolution of detection targets. Distributed MIMO radar can suppress the RCS angle flicker of the target. The superior performance of MIMO radar in many aspects makes it a current research hotspot. Unlike standard phased array antennas that transmit coherent waveforms, MIMO radars transmit incoherent wav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00G06N3/12
Inventor 王伟赵俊杰王慧闫金山王咸鹏马跃华王冠男李强李沫漩韩丽丽
Owner HARBIN ENG UNIV
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