Angle of arrival estimation method and apparatus

An angle of arrival and equipment technology, applied in the field of angle of arrival estimation methods and equipment, can solve the problems of increasing the complexity and cost of hardware circuit design

Active Publication Date: 2020-03-03
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the number of radio frequency circuits is increased in order to improve the estimation accuracy of the terminal angle of arrival, it will increase the complexity and cost of hardware circuit design, etc.

Method used

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  • Angle of arrival estimation method and apparatus
  • Angle of arrival estimation method and apparatus
  • Angle of arrival estimation method and apparatus

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Embodiment Construction

[0028] In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings.

[0029] With the development of smart terminals, more applications can provide users with personalized and differentiated services based on the terminal's location information, such as advertisement push, peripheral service discovery, navigation and so on. The positioning accuracy of the terminal affects the user experience of these services.

[0030] The AOA-based positioning method is a common terminal positioning method. When this method is used to locate the terminal, the more the number of receiving antennas, the better the estimation accuracy of the angle of arrival of the terminal is, thus helping to improve the positioning accuracy of the terminal. However, if a radio frequency circuit is provided for each antenna, the complexity and cost of hardware circuit design w...

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Abstract

The invention discloses an angle of arrival estimation method and apparatus. According to the method, a first device acquires first signals from a second device through a reference antenna and a firstantenna group and determines a first CSI and acquires second signals from the second device through the reference antenna and a second antenna group and determines a second CSI; the first device determines a phase difference vector between the first signals and the second signals according to a vector corresponding to the reference antenna in the first CSI and a vector corresponding to the reference antenna in the second CSI, and compensates the second CSI by using the phase difference vector; and the angle of arrival of the second device is estimated according to the first CSI and the compensated second CSI. When the angle of arrival of the second device is estimated, the signals received by the reference antenna, the first antenna group and the second antenna are utilized, and therefore, the estimation precision of the angle of arrival is improved, and the number of radio frequency circuits does not need to be increased.

Description

technical field [0001] The present application relates to the field of wireless communication, in particular to a method and device for estimating an angle of arrival. Background technique [0002] An access point (access point, AP) in a wireless local area network (wireless local area network, WLAN) may use an antenna array technology to estimate an angle of arrival (angle of arrival, AoA) at which a wireless signal of a terminal device reaches the AP. AoA can be used to locate end devices. [0003] The AP uses a radio frequency circuit to collect wireless signals received by the antenna. Usually, a radio frequency circuit can only acquire the wireless signal collected by one antenna at the same time. In the hardware circuit of an AP, the number of radio frequency circuits is limited, for example, usually 3-4. However, the increase in the number of antennas in the antenna array helps to improve the estimation accuracy of the terminal angle of arrival. If the number of r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/12G01S3/10H04B7/06
CPCG01S3/12G01S3/10H04B7/0626G01S3/48H04B7/0874G01S11/02G01S5/28H04W64/006G01S3/50H04W72/54
Inventor 潘淳何志健徐永千王云贵
Owner HUAWEI TECH CO LTD
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