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Arrival angle estimation method based on single antenna

A single-antenna, angle-of-arrival technology, applied in the field of communications, can solve the problem of high computational complexity of signal processing algorithms, and achieve the effects of simple hardware configuration and processing algorithms, simple hardware, and fast running speed

Active Publication Date: 2013-09-18
BEIJING JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

This method not only requires the use of multiple antennas and multiple radio frequency modules, but also the computational complexity of the signal processing algorithm used is relatively high

Method used

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  • Arrival angle estimation method based on single antenna
  • Arrival angle estimation method based on single antenna
  • Arrival angle estimation method based on single antenna

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Embodiment Construction

[0029] The technical solutions of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following examples are implemented on the premise of the technical solutions of the present invention, and detailed implementation methods and processes are given, but the protection scope of the present invention is not limited to the following examples.

[0030] Based on the method proposed by the present invention, in a multi-carrier-based channel detection system, the cosine of the channel angle of arrival is first obtained by using a single antenna, and then the angle of arrival is further obtained, which will be further elaborated below. As already pointed out above,

[0031] The present invention proposes a method for estimating the angle of arrival based on a single antenna, such as figure 1 shown, including:

[0032] Step S1: Select N measurement points located on a straight line within the selected targ...

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Abstract

The invention discloses an arrival angle estimation method based on a single antenna and belongs to the field of communication. The estimation method comprises selecting N measuring points located on the same straight line within a selected target range, enabling the interval between adjacent measuring points to be not larger than half of the length of a carrier, performing channel detection on the N measuring points by using a single antenna channel detection system, and obtaining channel time domain impact responses and corresponding receiving gains of the measuring points; adjusting the channel time domain impact responses according to the receiving gains, performing Fourier transform in spatial domains according to the adjusted channel time domain impact responses and calculating Doppler spread spectrums; extracting effective paths from the Doppler spread spectrums to obtain Doppler shifts corresponding to the effective paths, and calculating corresponding arrival angles according to the Doppler shifts. According to the estimation method, hardware costs and the realization complexity are low, and the estimation method is applied to rail transit environments as well as other wireless communication and positioning scenes.

Description

technical field [0001] The invention belongs to the field of communication, specifically relates to technical fields such as wireless channel detection and modeling, broadband wireless mobile communication, and orientation (Direction Finding), in particular to a method for estimating an angle of arrival based on a single antenna. Background technique [0002] Wireless channel characteristics are the basis for designing wireless communication systems and wireless positioning systems. Among the wireless channel characteristic parameters, the angle of arrival (AOA) is one of the most important items, which directly reflects the spatial characteristics of the wireless channel, and is useful for analyzing channel Doppler spread, spatial correlation and multi-antenna system design. very important. Modern rail transit has achieved great development in my country and the world because of its characteristics of large capacity, fast speed, safety, punctuality, environmental protectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
Inventor 赵友平李金兴
Owner BEIJING JIAOTONG UNIV
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