Device for estimating two-dimensional direction of arrival (DOA) of coherent signals based on L array and method thereof

A technology for coherent signal and direction estimation, which is applied to radio wave direction/bias determination systems, direction finders using radio waves, radio wave director components, etc. Dimensional estimation and other problems

Inactive Publication Date: 2011-11-23
XI AN JIAOTONG UNIV
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Problems solved by technology

However, when there is more than one incident signal, a pairing problem occurs and the estimation fails. In addition, these methods also require eigenvalue decomposition, which requires a large amount of calculation. At the same time, the existing methods cannot solve the multipath transmission environment. Two-dimensional direction of arrival estimation problem for coherent signals in

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  • Device for estimating two-dimensional direction of arrival (DOA) of coherent signals based on L array and method thereof
  • Device for estimating two-dimensional direction of arrival (DOA) of coherent signals based on L array and method thereof
  • Device for estimating two-dimensional direction of arrival (DOA) of coherent signals based on L array and method thereof

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[0047] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0048] like figure 1 and figure 2 As shown, a two-dimensional direction of arrival estimation device for coherent signals based on an L-shaped array includes a right-angle ruler L-shaped array antenna. One end of the straight z-direction equidistant linear sub-array antenna 2 is vertically connected to form, wherein the longitudinal x-direction equidistant linear sub-array antenna 1 includes the first longitudinal x-direction antenna elements x arranged in two equal distances along the longitudinal x-direction 1 , the second longitudinal x-direction antenna element x 2 , ..., M-th longitudinal x-direction antenna element x M A total of M antenna elements are formed, and the vertical z-direction equidistant linear sub-array antenna 2 includes the first vertical z-direction antenna elements z arranged in two equal distances along the vertical z-d...

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Abstract

The invention provides a device for estimating two-dimensional direction of arrival (DOA) of coherent signals based on an L array and a method thereof. The method is characterized by carrying out communication connection on a longitudinal x-direction equidistant linear subarray antenna, a vertical z-direction equidistant linear subarray antenna, an instantaneous correlation computation device, an instantaneous correlation matrix computation device, a linear operation sub-estimation device, a DOA estimation device and a DOA angle pairing device, utilizing a subarray averaging technology to carry out decorrelation on the incident signals, simultaneously implementing linear operation on cross-correlation matrices of L array received data to obtain null space, firstly estimating an angle of pitch and an azimuth angle respectively, then paring the angle of pitch and the azimuth angle and finally obtaining the azimuth angle according to the geometrical relationship, and the method dispenses with eigen-decomposition and has high computation efficiency.

Description

technical field [0001] The invention relates to a device and a method for a two-dimensional direction of arrival, in particular to a device and a method for estimating a two-dimensional direction of arrival of a coherent signal based on an L-shaped array. Background technique [0002] Array signal processing has developed rapidly in recent years, and its applications involve many military and national economic fields such as radar, communication, and sonar. It arranges multiple antenna elements at different positions in space to form an antenna array, and uses this antenna array to receive and process space radio waves, and extract radio wave signals and characteristic information received by the array. Array signal processing has the characteristics of flexible beam control, high signal gain, strong anti-jamming ability and high spatial super-resolution ability, and has received great attention from people. [0003] A typical problem in array signal processing is to estima...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14G01S3/12
Inventor 王光敏辛景民刘久郑南宁
Owner XI AN JIAOTONG UNIV
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