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Method for estimating gain correlations of multiple input multiple output (MIMO) radar channels

A channel gain and correlation technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as high computational complexity and achieve the effect of overcoming computational complexity

Inactive Publication Date: 2014-07-09
HOHAI UNIV
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Problems solved by technology

In the process of MIMO radar target detection, the minimum variance unbiased estimation of the correlation between the channel gains of the target observation needs to solve the cubic nonlinear equation; the method of estimating the correlation between the channel gains by using the construction of multiple fourth-order cumulants has the advantages of High computational complexity

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  • Method for estimating gain correlations of multiple input multiple output (MIMO) radar channels
  • Method for estimating gain correlations of multiple input multiple output (MIMO) radar channels
  • Method for estimating gain correlations of multiple input multiple output (MIMO) radar channels

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0024] according to figure 1 The space schematic diagram of the MIMO radar echo signal model in the establishment of the echo signal model, assuming that the MIMO radar has M transmitting stations t k (k=1,…,M) and N receiving stations r l (l=1,…,N), each transmitting station emits a distinguishable signal s k (t). Suppose the target centroid is located at (x c ,y c ,z c ), the dimension is D x ×D y ×D z , by Q located at X q =(x q ,y q ,z q )(q=1,…,Q), composed of mutually independent scattering points, and the reflection coefficient of each scattering point is a complex Gaussian random variable Σ(q). Then the signal received by the lth receiving station and scattered by the qth scattering point transmitted by the kth transmitting station is shown in the expression (1):

[0025] r lk ( ...

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Abstract

The invention discloses a method for estimating gain correlations of MIMO radar channels and belongs to the technical field of channel parameter estimation. The method comprises the steps of setting the false alarm probability and the minimal acceptable detection probability; calculating Fisher information when channel correlations use default values; using the local maximum potential to construct statistics of sampling signal matrixes, and calculating the channel correlation detection probability according to a unilateral detection principle; and changing default values of channel correlations to estimate channel gain correlations again when the channel correlation detection probability is lower than the minimal acceptable detection probability. According to the method, statistics of the local maximum potential are constructed, so that the defect that methods for estimating traditional radar channel gain correlations are complex in calculation can be eliminated.

Description

technical field [0001] The invention discloses a MIMO radar channel gain correlation estimation method, which belongs to the technical field of channel parameter estimation. Background technique [0002] MIMO (Multiple Input Multiple Output) radar rationally configures multiple transmitting stations and receiving stations in a certain area, and transmits multiple distinguishable signals at the same time, forming multiple One target observation channel; use the difference in parameters of multiple target observation channels and the scintillation of target radar cross section to obtain diversity gain, and improve the performance of radar detection, identification and parameter estimation for complex space targets and stealth targets. The spatial diversity condition of MIMO radar is related to factors such as the distance between stations, the attitude of the target, the distance between the target and the station, and the operating frequency of the radar. The obtained diversi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02
Inventor 胡居荣鹿浩鲁立志曹宁
Owner HOHAI UNIV
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