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Vehicle positioning parameter estimation method based on DOA/TOA joint estimation in multipath environment

A technology of joint estimation and vehicle positioning, which is applied to services based on location information, services based on specific environments, vehicle components, etc., to overcome poor vehicle positioning accuracy, improve estimation accuracy and reliability, and improve overall performance.

Active Publication Date: 2018-11-06
NANJING UNIV
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AI Technical Summary

Problems solved by technology

This method can provide very accurate positioning accuracy for the target vehicle, and can effectively overcome the shortcomings of noise interference and the loss of positioning accuracy caused by vehicle mobility, and meet the high-precision requirements of vehicle positioning

Method used

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  • Vehicle positioning parameter estimation method based on DOA/TOA joint estimation in multipath environment
  • Vehicle positioning parameter estimation method based on DOA/TOA joint estimation in multipath environment
  • Vehicle positioning parameter estimation method based on DOA/TOA joint estimation in multipath environment

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Embodiment Construction

[0026] In the vehicle positioning method, it is assumed that the positioning system has pre-deployed roadside node units beside the lane, and the communication distance of these roadside unit sets can cover the entire road. For vehicles, the position information of these roadside units is known. In this system, the V2I communication between the roadside unit and the vehicle is completed through the 802.11P protocol. A multi-antenna array is also installed on the driving vehicle to detect the multipath channel frequency response of the received OFDM signal. In addition, the vehicle can also obtain the current speed vector data through its own navigation or speed sensor. The positioning scene of the driving vehicle is as follows: figure 1 shown. The specific steps of the method include: the target vehicle uses the vehicle-mounted uniform linear array (ULA) to receive the OFDM signal transmitted by the RSU, and then transmits the digital signal to the TLS-ESPRIT algorithm after...

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Abstract

The invention provides a vehicle positioning parameter estimation method based on DOA / TOA joint estimation in a multipath environment. Positioning parameters are extracted via the communication between a vehicle and roadside facilities, the wireless communication between a target vehicle and an RSU follows the IEEE802.11p protocol, and an orthogonal frequency division multiplexing signal is transmitted in a wireless channel thereof; the joint parameter estimation of DOA and TOA is achieved via the analysis of the multipath channel frequency response of the signal, and the channel noise interference is reduced by using the unscented Kalman filtering to improve the overall performance of the method; and the high-speed moving vehicle and a roadside unit RSU establish communication using the OFDM signal and use the total least squares algorithm TLS-ESPRIT based on the rotation invariant technique to calculate the vehicle positioning parameters, and the position information of the target vehicle can be obtained based on the estimated DOA and TOA.

Description

technical field [0001] The invention relates to a vehicle positioning method, in particular to a vehicle positioning parameter estimation method based on DOA / TOA joint estimation in a multipath environment, and belongs to the technical field of wireless communication. Background technique [0002] The research on the key technology to realize the precise positioning of the target vehicle in the multipath environment mainly includes: how to improve the resolution of the positioning parameters, how to overcome the loss of positioning accuracy caused by the mobility of the vehicle, and using the super-resolution parameter estimation method and the Kalman filter It can effectively overcome the influence of noise during vehicle positioning and compensate for the loss of accuracy during high-speed driving. [0003] At present, different positioning methods can be used for precise positioning of driving vehicles. One of the most widely used positioning methods is the global naviga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W4/44H04B7/08
CPCH04B7/0897H04W4/023H04W4/44
Inventor 施毅张善杰
Owner NANJING UNIV
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