[1]王显海,孟桥,张健伟,等.一种基于IWOLA的脉冲星消色散数字终端设计[J].东南大学学报(自然科学版),2015,45(2):208-213.[doi:10.3969/j.issn.1001-0505.2015.02.002]
 Wang Xianhai,Meng Qiao,Zhang Jianwei,et al.Design of digital backend based on IWOLA for pulsar de-dispersion[J].Journal of Southeast University (Natural Science Edition),2015,45(2):208-213.[doi:10.3969/j.issn.1001-0505.2015.02.002]
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一种基于IWOLA的脉冲星消色散数字终端设计()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第2期
页码:
208-213
栏目:
信息与通信工程
出版日期:
2015-03-20

文章信息/Info

Title:
Design of digital backend based on IWOLA for pulsar de-dispersion
作者:
王显海孟桥张健伟张添翼
东南大学射频与光电集成电路研究所, 南京 210096
Author(s):
Wang Xianhai Meng Qiao Zhang Jianwei Zhang Tianyi
Institute of RF- & OE-ICs, Southeast University, Nanjing 210096, China
关键词:
PDFT IWOLA算法 FPGA 消色散
Keywords:
PDFT(polyphase filter discrete Fourier transform) IWOLA(improved weighted overlap-add)algorithm FPGA(field programmable gate array) de-dispersion
分类号:
P161.4
DOI:
10.3969/j.issn.1001-0505.2015.02.002
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 a field programmable gate array(FPGA)-based digital backend for pulsar de-dispersion, in order to overcome the bottleneck caused by high-speed on-chip random-access-memory(RAM)resources for system design, a polyphase filter bank(PFB)based on improved weighted overlap-add(IWOLA)algorithm is proposed. Based on this algorithm, a digital backend for pulsar de-dispersion towards wideband real signals is presented. It works with reduced multiband. The theoretical analysis results show that the proposed digital backend saves the system requirements for high-speed on-chip RAM and the subsequent signal processing units, improving the frequency resolution under the premise of guaranteed time resolution. Additionally, it has high computation efficiency and resolves the system design defect caused by polyphase filter discrete Fourier transform(PDFT)algorithm. The digital backend based on the IWOLA algorithm saves the block RAM(BRAM)resources up to 25% when the length of the following FFT in system is 8 192. The simulation results show that the performance of the proposed system meets the requirements of design.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2014-10-29.
作者简介: 王显海(1980—),男,博士生;孟桥(联系人),男,博士,教授,博士生导师,mengqiao@seu.edu.cn.
引用本文: 王显海,孟桥,张健伟,等.一种基于IWOLA的脉冲星消色散数字终端设计[J].东南大学学报:自然科学版,2015,45(2):208-213. [doi:10.3969/j.issn.1001-0505.2015.02.002]
更新日期/Last Update: 2015-03-20