一种基于IWOLA的脉冲星消色散数字终端设计

发布时间：2018-03-03 17:11

本文选题：PDFT　切入点：IWOLA算法　出处：《东南大学学报(自然科学版)》2015年02期 　论文类型：期刊论文

【摘要】：在基于FPGA的脉冲星消色散数字终端中,为了解决片内高速RAM资源的系统设计瓶颈,提出了一种基于IWOLA算法的多相滤波器组(PFB),并基于该算法构建了一种针对宽带实输入信号的脉冲星消色散数字终端.该数字终端通过约简多子带进行处理.理论分析结果表明,该数字终端节省了系统对高速RAM和后续信号处理单元的需求,在保证时间分辨率的前提下提高了频率分辨率.另外,该数字终端计算效率高,且克服了基于PDFT算法的系统设计缺陷.当脉冲星消色散终端中FFT模块的长度为8 192时,基于IWOLA算法的脉冲星消色散数字终端最大节省了25%的BRAM资源.仿真实验结果表明,该系统的性能满足设计要求.
[Abstract]:In order to solve the bottleneck of the system design of high speed RAM resource in the digital terminal of pulse star based on FPGA, A polyphase filter bank based on IWOLA algorithm is proposed. Based on this algorithm, a pulsar dedispersive digital terminal for wideband real input signals is constructed. The digital terminal is processed by reducing the polysubbands. The theoretical analysis results show that, The digital terminal saves the demand of the system for high-speed RAM and subsequent signal processing units, and improves the frequency resolution on the premise of ensuring the time resolution. In addition, the digital terminal has high computing efficiency. The system design defect based on PDFT algorithm is overcome. When the length of FFT module in pulsar dedispersive terminal is 8 1922, the IWOLA algorithm based pulsar dedispersive digital terminal can save 25% BRAM resource. The simulation results show that, The performance of the system meets the design requirements.
【作者单位】：东南大学射频与光电集成电路研究所;
【分类号】：P145.6;P161.4

【共引文献】