Design and implementation of equilateral triangle array digital direction finding system

IEICE Electronics Express

Huotao Gao¹  Huajun Zhang¹  Yuxiang Sun¹  Lin Zhou¹  Fan Wang¹ 

[1] Electronic Information Department, Wuhan University

关键词: direction of arrival;    equilateral triangle array;    channel calibration;    field programmable gate array;    multiple signal classification algorithm;   

DOI  :  10.1587/elex.9.1102

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(14)In this work, a scheme of an equilateral triangle array digital direction finding system is proposed, which implements the online real-time direction finding task for an airborne system. The three-elements equilateral triangle array can be used for calibrating the channel errors and eliminating the DOA (direction of arrival) fuzzy problem of the two-elements linear array, which is greatly reduced the system complexity and suitable for portable requirement. At the same time, the project adopts field programmable gate array (FPGA) to process the sample data in parallel mode, including data quadrature demodulation and multiple signal classification (MUSIC) algorithm. The hardware implementation of MUSIC algorithm makes the system more flexible and faster than software implementation. The experimental results show that the deviation is less than 0.5 degrees with over 64 snapshots and the time is less 6ms with 256 snapshots, and then the program can complete the MUSIC algorithm accurately with high speed.

【 授权许可】

Unknown