基于临界采样多相滤波器组的宽带信号信道化  

Channelization of wideband signal based on critical sampling polyphase filter banks

作　　者：张海龙[1,2,3,4] 张萌 张亚州[1,2] 王杰 冶鑫晨 王万琼[1] 李嘉 杜旭 张婷[1,2] ZHANG Hai-long;ZHANG Meng;ZHANG Ya-zhou;WANG Jie;YE Xin-chen;WANG Wan-qiong;LI Jia;DU Xu;ZHANG Ting(Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China;National Astronomical Data Center,Beijing 100101,China)

机构地区：[1]中国科学院新疆天文台,乌鲁木齐830011 [2]中国科学院大学天文与空间科学学院,北京100049 [3]中国科学院射电天文重点实验室,南京210008 [4]国家天文科学数据中心,北京100101

出　　处：《吉林大学学报（工学版）》2023年第8期2388-2394,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点研发计划项目(2021YFC2203502,2022YFF0711502);国家自然科学基金项目(12173077,12003062);新疆维吾尔自治区天山创新团队计划项目(2022D14020);“天山英才培养”计划项目(2022TSYCCX0095);中国科学院科研仪器设备研制项目(PTYQ2022YZZD01);国家天文科学数据中心;中国科学院天文台站设备更新及重大仪器设备运行专项经费;新疆维吾尔自治区自然科学基金项目(2022D01A360).

摘　　要：针对通信及射电天文领域宽带信号子带划分过程中遇到的频谱泄漏及子带混叠等问题,仿真分析了Hanning窗、Hamming窗和Kaiser窗等不同窗函数对有限冲激响应(FIR)数字滤波器性能的影响。基于Hamming窗FIR数字滤波器设计实现了临界采样多相滤波器组,研究了临界采样多相滤波器组的频谱特性。利用天文观测基带数据实现了宽带信号的子带划分,分析了临界采样多相滤波器组与传统FIR数字滤波器组的滤波性能特征。利用临界采样多相滤波器组实现了宽带基带数据的多通道输出,并对子信道内频谱信息进行了分析和修正,得到了与原始信号相对应的子通道频谱。In view of spectral leakage and aliasing in the wideband signal channelization in the field of communication and radio astronomy.The effects of different window functions such as Hanning windows,Hamming windows and Kaiser windows on the performance of the finite impulse response(FIR)digital filter were simulated and analyzed.Based on the Hamming window FIR digital filter designed and implemented the critical sampling polyphase filter banks,and the spectral characteristics of the critical sampling polyphase filter banks were studied.The sub-bands division of wideband signals were realized by using the astronomical observation baseband data,and the filtering performance characteristics of the critical sampling polyphase filter banks and FIR digital filter banks were analyzed.Employed the critical sampling polyphase filter banks realized the multichannel output of wideband baseband data,and the frequency spectrum of the sub-channels was analyzed and corrected,which correspond to the original signal.

关 键 词：天文信息技术 多相滤波器组 有限冲激响应滤波器 数字滤波器组 信道划分 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]