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Estimation method of two-dimensional central direction of arrival for distributed sources

A technology of distributed source and angle of arrival, applied in direction finders using radio waves, radio wave direction/deviation determination systems, etc., can solve problems such as poor estimation performance of MP and low pairing success rate

Inactive Publication Date: 2014-12-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires fewer array elements, but other estimation performance is not as good as the MP method
Although these two existing methods have their own advantages and disadvantages, both require an additional parameter pairing procedure and have a low pairing success rate

Method used

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  • Estimation method of two-dimensional central direction of arrival for distributed sources
  • Estimation method of two-dimensional central direction of arrival for distributed sources
  • Estimation method of two-dimensional central direction of arrival for distributed sources

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: Estimated pairing performance of the method of the present invention on the central DOA of multiple distributed sources.

[0032] In this embodiment, six distributed information sources are set, and their central azimuth and central elevation angles are respectively: (θ 1 ,φ 1 )=(40°,50°), (θ 2 ,φ 2 )=(50°,70°), (θ 3 ,φ 3 )=(70°,90°), (θ 4 ,φ 4 )=(80°,40°), (θ 5 ,φ 5 )=(60°,80°), (θ 6 ,φ 6 )=(30°, 60°), when the signal-to-noise ratio is 10dB and the sampling number T=200, 500 independent Monte Carlo simulations are performed.

[0033] Such as figure 1 As shown, the steps of the two-dimensional distributed source center DOA estimation method of the present invention are as follows:

[0034] Step 1: If figure 2 The three-dimensional antenna array is set as shown. The three-dimensional antenna array consists of a P array and a Q array to form a double-parallel array structure. The P array is set on the z-axis, and the Q array is set on the x-z p...

Embodiment 2

[0055] Embodiment 2: Investigate the performance of the root mean square error of the central DOA of a distributed source as the signal-to-noise ratio changes.

[0056] The central azimuth and central elevation angles of the distributed sources used in this embodiment are (50°, 70°), the total number of array elements is 10, and 500 independent Monte Carlo simulations are performed when the sampling data T=200.

[0057] The steps of the two-dimensional distributed source center DOA estimation method in this embodiment are the same as the summary of the invention and the process of Embodiment 1, and the process is as follows figure 1 shown. Figure 5 It is the comparison of the root mean square error of the center DOA with the change of the signal-to-noise ratio of the existing MP method, the TLS-ESPRIT method and the method provided by the present invention. From Figure 5 As can be seen, when the signal-to-noise ratio is greater than-8dB, the curve of the center DOA root me...

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Abstract

The invention belongs to the technical field of wireless mobile communication. A three-dimensional antenna array formed by two parallel uniform linear arrays is set, a data matrix for the distributed sources is established, and a cross-correlation matrix for receiving data through two arrays is adopted, so that influences of additive noise on central direction of arrival estimated performance are effectively eliminated, and estimated accuracy of the two-dimensional direction of arrival with a low signal-to-noise ratio for the distributed sources is improved. In addition, a central azimuth angle and a central pitch angle are estimated respectively by using a one-to-one corresponding relation between eigenvalues and eigenvectors, automatic pairing can be completed without other matchers, and the pairing success rate is higher. The estimation method is simple, reliable, high in parameter pairing success rate and parameter pairing precision, and the like.

Description

technical field [0001] The invention belongs to the technical field of wireless mobile communication, and in particular relates to a method for estimating the two-dimensional center angle of arrival of a multipath distributed information source by using an array antenna. Background technique [0002] In modern wireless mobile communication systems, the direction of arrival (DOA for short) of a signal is a very important parameter. Accurate estimation of DOA parameters is the key and foundation to realize other functions of communication system (smart antenna, wireless positioning, etc.). Therefore, the estimation accuracy of DOA parameters has a crucial impact on the performance of wireless communication systems. [0003] In a dense communication environment such as an urban area, the signal transmitted by the mobile terminal will form scattering in space, especially when the scattering occurs in a small area, and the surrounding tall buildings will also form diffraction to...

Claims

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 杨学敏郑植周亮钟朗
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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