Single snapshot direction finding method based on uniform circular array
A uniform circular array, single-shot technology, applied to direction finders using radio waves, orientators for measuring directions, measuring devices, etc.
Active Publication Date: 2020-07-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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However, both of these methods can only handle matrices with vandemonde form, and cannot directly perform single-shot direction finding when using a uniform circular array
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[0081] In this example, matlab is used to verify the above-mentioned single-snapshot array direction finding algorithm based on uniform circular array. For the sake of simplicity, the following assumptions are made on the algorithm model:
[0082] 1. All engineering errors are added to the equivalent noise;
[0083] 2. Assume that the target is stationary;
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The invention belongs to the technical field of electronic countermeasure, and particularly relates to a single snapshot direction finding method based on a uniform circular array. According to the invention, for array receiving data of a uniform circular array, the data is converted into receiving data of a virtual linear array through mode space conversion, so that the array flow pattern has a Vandemonde form. And then a pseudo covariance matrix is constructed, so that the pseudo covariance matrix used for subsequent processing can reach a full rank, and therefore, subsequent feature decomposition can correctly segment a signal subspace and a noise subspace. The method comprises the following steps: firstly, converting an array flow pattern of a uniform circular array into a virtual linear array, then constructing a pseudo covariance matrix, and finally, carrying out a MUSIC algorithm. The method has the beneficial effects that single snapshot direction finding can be performed by using the uniform circular array, the method is simple, and the effect is good.
Description
technical field [0001] The invention belongs to the technical field of electronic countermeasures, and relates to a single-snapshot direction finding method based on a uniform circular array. Background technique [0002] Angle of Arrival (DOA) estimation is one of the main problems to be studied in array signal processing. DOA estimation has a wide range of applications in radio communication, electronic reconnaissance and other fields. Single-snapshot DOA estimation only processes the data of a single snapshot to realize the direction-of-arrival estimation of the input signal. At present, with the continuous improvement of real-time requirements for DOA estimation, reducing the number of sampling snapshots to reduce the amount of algorithm calculation and improve the real-time performance of the system has become a research hotspot in the field of DOA estimation in recent years. [0003] Among the single-shot direction finding algorithms, the most widely used ones are bas...
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IPC IPC(8): G06F17/16G06F17/14G01S3/14
CPCG06F17/16G06F17/141G01S3/143
Inventor 熊钊彭晓燕魏逸凡李万春魏平
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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