基于CPU-GPU的有序统计类恒虚警检测优化  

Order Statistics Constant False-alarm Optimization Based on CPU-GPU

作　　者：火静斌 张晓滨[1] 田泽 HUO Jing-bin;ZHANG Xiao-bin;TIAN Ze(Xi’an Polytechnic University,Xi’an 710048,China;Integrated Circuit and Microsystem Design Key Laboratory of Aviation Science and Technology,Xi’an 710068,China)

机构地区：[1]西安工程大学,陕西西安710048 [2]集成电路与微系统设计航空科技重点实验室,陕西西安710068

出　　处：《计算机技术与发展》2023年第4期40-45,共6页Computer Technology and Development

基　　金：西安工程大学研究生创新基金(chx2022021)。

摘　　要：雷达信号处理算法的高性能实现是雷达系统设计中的关键技术。而恒虚警检测技术是雷达信号目标检测系统中控制虚警率的重要手段之一,也是最耗费系统资源的地方。传统的恒虚警检测技术主要采用DSP和FPGA等定制化设备,但存在的问题主要有开发周期长、调试难度大、耗费资源。为了满足脉冲多普勒雷达回波数据的实时处理需求以及国产化GPU的生态扩充,文章针对恒虚警检测技术分析了有序统计类恒虚警检测方法(OSCFAR)的可并行性问题,并基于OpenCL平台提出了对OSCFAR进行GPU加速的方法。该方法中提出了OSCFAR在GPU中避免条件分支的并行化技术,优化了适用于GPU的并行化排序方法,减少了系统访问全局内存所花费的时间。最后从性能测试和误差分析角度评估了OSCFAR的实时性和准确性,实验结果表明,在所使用的硬件平台上相比于传统CPU实现达到了60倍以上的加速比,处理精度可以达到与原有方案相同的水平。High-performance implementation of radar signal processing algorithms is a key technology in radar system design.Constant False Alarm Rate(CFAR)detection is one of the important means to control the false-alarm rate in the radar signal target detection system.The traditional CFARs use customized equipment such as DSP and FPGA,but the long development cycle,difficult debugging,and resource consumption are the main problems.To meet the real-time processing requirements of pulsed Doppler radar echo data and the ecological expansion of domestic GPUs,we analyze the parallelism problem of the Ordered Statistical Constant False Alarm Rate(OSCFAR).Based on the platform accelerated OSCFAR on GPU,we propose a parallelization technique for OSCFAR to avoid conditional branches in GPU,optimize the parallelization sorting method suitable for GPU,and reduce the time it takes for the system to access global memory.Finally,the real-time performance and accuracy of OSCFAR are evaluated from the perspective of performance testing and error analysis.Compared with the traditional CPU on the hardware platform,the results show that the acceleration ratio is more than 60 times,and the processing accuracy can reach the same level as the original one.

关 键 词：雷达信号处理 并行计算 恒虚警检测 双调排序 OPENCL 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]