全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

一种改进型双级捕获系统研究及其VLSI实现

Keywords: 双级捕获,1+M/N,超大规模集成电路(VLSI),FPGA+DSP

Full-Text   Cite this paper   Add to My Lib

Abstract:

针对以匹配滤波器捕获作为前端,串行滑动相关器作为后级验证的普通双级捕获算法占用资源较多并且结构复杂的缺点,提出了一种改进型的双级捕获系统.该系统在前端利用积分时间较短的串行相关器快速跳过同步阶段,在后端采用不同积分时间的串行相关器组进行验证,并采用了一种改进的(1+M/N)检测算法.最后通过FPGA+DSP的硬件平台实现了捕获电路,利用Modelsim仿真验证了改进型双级捕获算法电路中各个模块的正确性.性能比较结果表明,相比普通双级捕获系统,所提出的系统不仅可以有效降低资源使用量,而且较大地提高了检测概率.

References

[1]  Zhao Zhijin, Xing Guoji, Wu Jia. The detection methods based on the fourth-order moment slices and the accumulation for DSSS/QPSK signal //Proceedings of ICSP. Beijing: ICSP, 2006:16-19.
[2]  王家勇,陈寅健.扩频码双级快速捕获系统设计及性能分析[J].北京:应用科学学报,2002,20(3):326-330. Wang Jiayong, Chen Yinjian. The design and performance analysis of two-stage rapid capture system of spreading code[J]. Beijing: Journal of Applied Sciences, 2002,20(3):326-330. (in Chinese)
[3]  Zhan Yunzhi, Gan Minggang. An improved two-stage acquisition algorithm in DSSS[J]. Wicom, 2011,10:1-4.
[4]  Song Weining, Zhang Yanzhong, Shao Dingrong, et al. Novel fast acquisition algorithm for DS/FH system //Proceedings of International Conference on Business Management and Electronic Information. Guangzhou: BMEI, 2011:460-462.
[5]  Xia Shuangzhi, Liu Hongwei. A new radar detection method using previous decision information[J]. Acta Electronica Sinaa, 2010,38(12):2855-2861.
[6]  Tan Xiaofeng. Design on parallel structure of DSSS receiver using FPGA //Proceeding of WICOM. Chengdu: WICOM, 2010:1-4.
[7]  Weigang Z, Yanhong K, Qishan Z. Segmented matched filter with differentially coherent combined for PN code fast acquisition[J]. International Symposium on Communications and Information Technology, 2009(9):876-880.
[8]  Song Yang, Hu Guangrui. Rapid coherent acquisition for PN sequence using optimum search algorithm[J]. Journal of Shanghai University, 2005(8):339-343.
[9]  孙进芳,李晓白,金天.影响GPS信号C/A码捕获的因素分析及改善方法[J].航空科学技术,2007(4):36-39. Sun Jinfang, Li Xiaobai, Jin Tian. Factors affecting GPS C/A code acquisition and improving method[J]. Aeronautical Science and Technology, 2007(4):36-39.
[10]  周荣俊.基于FPGA和DSP伪码测距系统捕获研究.北京:北京理工大学自动化学院,2010. Zhou Rongjun. The research of PN ranging system acquisition based on FPGA and DSP. Beijing: School of Automation, Beijing Institute of Technology, 2010. (in Chinese)
[11]  崔保延.GPS软件接收机基础[M].陈军,潘高峰,译.成都:电子工业出版社,2005. Cui Baoyan. Fundamentals of global positioning system receivers a software approach[M]. Chen Jun, Pan Gaofeng, transl. Chengdu: Publishing House of Electronics Industry, 2005. (in Chinese)
[12]  Akopian D, Sagiraju P K. Performance of two-stage massive correlator architecture for fast acquisition of GPS signals //Proceeding of IEEE Region 5 Conference Paris. : IEEE, 2010:137-140.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133