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Angle evaluating method for restraining multi-path influence

A technology of angle estimation and angle, which is applied in direction finders using radio waves, radio wave direction/deviation determination systems, measuring devices, etc., can solve the problems of complex anti-multipath implementation and low precision, and achieve simple implementation and improved Effect of Angle Estimation Accuracy

Inactive Publication Date: 2007-03-28
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] The existing DOA DIRECTION OF ARRIVAL technology is not suitable for dense multipath environments, especially for the angle estimation of radiation sources in non-visual (NLOS, Non Line of Sight) environments, while the existing The anti-multipath angle estimation technology has the disadvantages of complex implementation and low precision. The purpose of this invention is to provide a method for angle estimation that can suppress the multipath effect. It can also accurately measure the angle of the radiation source, and it is easy to implement

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  • Angle evaluating method for restraining multi-path influence
  • Angle evaluating method for restraining multi-path influence
  • Angle evaluating method for restraining multi-path influence

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Embodiment Construction

[0062] Referring to Fig. 2, the present invention is used for estimating the angle of the radiation source, and the corresponding paths are screened out according to the conditions of various paths between the radiation source and the receiver, and then the angle is estimated. The method consists of five basic steps:

[0063] The first step 201 is to collect data to obtain the power delay distribution data of the radiation source;

[0064] The second step 202 is to judge the path, and identify the position and power of the effective path on the power delay distribution;

[0065] The third step 203 is to perform NLOS identification, using the position and power information of the path output in the second step to identify whether there is a direct path between the radiation source and the receiver;

[0066] The fourth step 204 is to screen the paths, and adopt different path screening methods according to the results of the NLOS identification in the third step;

[0067] The ...

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Abstract

The invention for evaluating angle of radiation source includes following steps. (1) Data acquisition is carried out in order to obtain data of power time delay distribution of radiation source. (2) Path determination is carried out so as to recognize the position and power of effective path on the power time delay distribution. (3) NLOS recognition is carried out. Using the information of position and power of the path output from step (2) recognizes whether a direct path between the radiation source and receiver is existed or not. (4) Filtering paths is carried out. (5) Based on the result recognized by NLOS and the result of filtering paths, the correspondent method for evaluating angle is determined. The invention raises the accuracy for evaluating angle of radiation source at complex geographic environment, suitable for evaluating azimuth or pitch angle.

Description

technical field [0001] The invention relates to the field of wireless positioning, in particular to an angle estimation method for positioning a mobile station in a third-generation cellular mobile communication system. Background technique [0002] In radiolocation or orientation techniques, angle estimation is a fundamental technique. U.S. Patent No. 6,008,759 discloses an ESPRIT method that has been widely studied in array antenna receivers, which can produce high estimation accuracy, but the essence of the method is to estimate the angle of arrival of the path rather than the radiation Estimation of the actual angle of the source, the premise of this method is that there is a visible path between the radiating source and the receiver. In actual use, especially in the case of multipath or no direct path or weak direct path, the accuracy of this method cannot be guaranteed. First, when there is a LOS path (visible path) between the radiation source and the receiver, when...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/06G01S3/14G01S5/10
Inventor 刁心玺吴和兵
Owner HUAWEI TECH CO LTD
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