A Passive Direction Finding of Virtual Time Reversal Method Based on Cross Antenna Array

Yongqing Fu,Shengnan Guo,Zhixin Yu

doi:10.1109/access.2019.2924315

Yongqing Fu, Shengnan Guo + Show 1 more

Open Access

https://doi.org/10.1109/access.2019.2924315

Copy DOI

Abstract

This paper presents a passive direction finding of a virtual time reversal method based on cross antenna array (CROSS-VTR), which aim is to solve the problem that the number of antenna elements of planar arrays is too large and the layout of circular arrays is complex which requires high hardware design. In order to verify the feasibility and accuracy of the algorithm, the mathematical model of the cross antenna array is first established. The search area of yaw angle and a pitch angle of the CROSS-VTR algorithm is determined according to the basic principle of passive time reversal focusing, and then, the time-reversed signal of each antenna element completes the time delay compensation at each scanning point in the search area. The compensated signals of each antenna element are added up to obtain the signal energy of each scanning point. The value of the yaw angle and pitch angle is obtained by searching the maximum energy among scanning points along the search route of yaw angle and pitch angle, respectively. Finally, the validity of the method is verified and compared with the music algorithm (multiple signal classification) based on the cross antenna array. The results show that the method has good direction finding accuracy at low signal-to-noise ratio.

Highlights

detection for the multi-path effect (DOA) estimation is an important research direction in array signal processing
This paper presents a passive direction finding of virtual time reversal method based on cross antenna array(CROSS-VTR), because of that the cross antenna array is simple in structure, low in complexity and similar to the plane antenna array in performance
The simulation experiments are carried out according to the specific steps of direction finding, and compared with the simulation data of MUSIC algorithm based on the cross antenna array (CROSSMUSIC) and CAPON algorithm based on the cross antenna array (CROSS-CAPON) to verify the validity and accuracy of CROSS-VTR

Summary

INTRODUCTION

DOA estimation is an important research direction in array signal processing. The basic problem of DOA estimation is to determine the direction of multiple sources of interest existing in a certain region of space at the same time [1]–[7]. Method [22]–[26]which can achieve super-resolution DOA estimation This method works in an active way, it uses a transceiver sensor array (time reversal mirror, TRM) to complete the information signal source reception, time reversal, retransmission and direction finding and so on. This direction finding method has been widely used in the field of ultrasonic [27]–[29] and underwater acoustic communication [30]–[35]. Paper [43] proposed a passive direction finding method based on virtual time reversal which is different from the existing classical algorithm It is an algorithm with high accuracy and low computational complexity, indicating that this project has the ability of easy engineering. The simulation experiments are carried out according to the specific steps of direction finding, and compared with the simulation data of MUSIC algorithm based on the cross antenna array (CROSSMUSIC) and CAPON algorithm based on the cross antenna array (CROSS-CAPON) to verify the validity and accuracy of CROSS-VTR

FUNDAMENTAL OF PASSIVE TIME REVERSAL FOCUSING

THE PRINCIPLE AND PROCEDURE OF CROSS-VTR ALGORITHM

COMPUTER SIMULATION AND EXPERIMENTAL RESULTS ANALYSIS

CONCLUSION