基于GPU的相位干涉仪FX鉴相算法

doi:10.12305/j.issn.1001-506X.2022.11.05

Abstract

Abstract:

Aiming at the processing requirements of a large number of high-speed and real-time signals in the phase interferometer direction-finding system, a FX phase identification algorithm based on graphics processing unit (GPU) is designed. The corresponding parallel programming is completed, and the real-time data are tested and verified. In order to give full play to the powerful floating-point computation and parallel data processing capability of the GPU, the core phase detection algorithm which involves a large number of parallel high-speed data calculation is loaded into GPU, the correlation processing and phase extraction of high-speed parallel data are realized. At the same time, central processing unit (CPU) is used to complete functions of data scheduling, distribution, and simple data processing. The experimental results show that under the condition of guaranteeing the phase-detection accuracy, the data processing speed of the GPU-based phase detection algorithm designed is about 140 times that based on CPU platform. The phase-detection speed is obviously improved, and the design intentions of real-time, reliability, and accuracy are realized satisfactorily.

Key words: graphics processing unit (GPU), phase interferometer, phase idetification algorithm, parallel computing

CLC Number:

TN911

Dong LI, Yiwen JIAO, Zefu GAO, Wenge YANG, Feilong MAO, Fei TENG. FX phase identification algorithm for GPU-based phase interferometer[J]. Systems Engineering and Electronics, 2022, 44(11): 3320-3329.

Figures/Tables 18

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References 34

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基线名称	42	14	12	32	43	13
长度/m	0.2	0.3	0.5	0.5	0.7	1

设计指标	指标参数
射频频率	2 250
采样频率	50
中频频率	137.5
下变频频率	2 387.5

运算单元	GPU平台/ms	CPU平台/ms	加速比
类型转换	66.925	1 273.26	19.0
FFT	25.365	1 403.81	55.3
共轭相乘	75.525	3 158.24	41.9
能量累积	117.135	3 854.70	32.9

测试次数	GPU平台/ms	CPU平台/ms	平台加速比
第1次	895	121 660	135.9
第2次	841	120 050	142.7
第3次	872	120 930	138.7
第4次	862	114 910	13.33
第5次	853	116 220	13.62
第6次	872	113 470	13.01
第7次	878	124 450	14.17
第8次	884	118 920	13.45
第9次	849	118 110	13.91
第10次	829	120 040	14.48

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FX phase identification algorithm for GPU-based phase interferometer

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