基于FPGA的短波扩频通信系统设计与实现
摘要
本文研究内容源自科研课题“短波宽带扩频技术研究”,该课题的研究目标是设计并在硬件平台上实现短波宽带扩频突发数据传输系统,本文研究基于Xilinx器件的短波扩频通信系统的FPGA设计与实现。
本文首先介绍了扩频基础理论,给出了本扩频通信系统设计方案和实现框图;其次,根据系统中各个环节的算法设计,采用自顶向下的方法对整个系统进行模块划分,并对每个模块进行了理论研究,给出了具体的FPGA实现方法和部分功能仿真波形;最后,介绍了系统的硬件描述语言Verilog HDL,在以Xilinx Spartan芯片为核心的硬件平台上进行了系统测试,时序分析结果表明本系统符合时序要求,利用ChipScope Pro测得抓取到的收发数据一致,验证了整个扩频通信系统设计的正确性。
The research of this thesis is derived from a project named as“The Research on Wideband HF Spread Spectrum Technology”. The goal of this project is to design and implement the wideband HF burst data transmission system on the hardware platform with making use of spread spectrum method. This thesis lays emphasis on the design and implementation of this HF spread spectrum communication system based on the Xilinx chip.
Firstly, the basic theory of spread spectrum communication is introduced, and then taking into consideration of the requirements of technical target, the implementation scheme of this system is designed, including the transmitting part and the receiving part. Secondly, the system is divided into several modules with the Top-Down method according to different characteristics of algorithm of each module. Detailed block diagram of structures and simulation waves are given based on the principle of the HF spread spectrum communication system. Finally, after timing analysis the system is tested in the hardware electric circuit whose core is Xilinx Spartan chip using Verilog HDL, and the received data captured by ChipScope Pro is the same as the transmitted data, verifying the correctness of the spread spectrum system.
本文首先介绍了扩频基础理论,给出了本扩频通信系统设计方案和实现框图;其次,根据系统中各个环节的算法设计,采用自顶向下的方法对整个系统进行模块划分,并对每个模块进行了理论研究,给出了具体的FPGA实现方法和部分功能仿真波形;最后,介绍了系统的硬件描述语言Verilog HDL,在以Xilinx Spartan芯片为核心的硬件平台上进行了系统测试,时序分析结果表明本系统符合时序要求,利用ChipScope Pro测得抓取到的收发数据一致,验证了整个扩频通信系统设计的正确性。
The research of this thesis is derived from a project named as“The Research on Wideband HF Spread Spectrum Technology”. The goal of this project is to design and implement the wideband HF burst data transmission system on the hardware platform with making use of spread spectrum method. This thesis lays emphasis on the design and implementation of this HF spread spectrum communication system based on the Xilinx chip.
Firstly, the basic theory of spread spectrum communication is introduced, and then taking into consideration of the requirements of technical target, the implementation scheme of this system is designed, including the transmitting part and the receiving part. Secondly, the system is divided into several modules with the Top-Down method according to different characteristics of algorithm of each module. Detailed block diagram of structures and simulation waves are given based on the principle of the HF spread spectrum communication system. Finally, after timing analysis the system is tested in the hardware electric circuit whose core is Xilinx Spartan chip using Verilog HDL, and the received data captured by ChipScope Pro is the same as the transmitted data, verifying the correctness of the spread spectrum system.
引文
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[2]田耘,徐文波. Xilinx FPGA开发实用教程.清华大学出版社. 2008.
[3]田耘,徐文波,张延伟.无线通信FPGA设计.电子工业出版社. 2008.
[4]张欣.扩频通信数字基带信号处理算法及其VLSI实现.科学出版社. 2004.
[5]张辉,曹丽娜.现代通信原理与技术.西安电子科技大学出版社. 2005. 231.
[6]袁超伟,陈德荣,冯志勇. CDMA蜂窝移动通信.北京邮电大学出版社. 2003. 146-148.
[7]杨小牛,楼才义,徐建良.软件无线电原理与应用.电子工业出版社. 2001.
[8] Xilinx Corporation. Spartan-3A DSP FPGA Family Data Sheet. 2008.
[9]褚振勇,齐亮,田红心,高楷娟. FPGA设计及应用(第二版).西安电子科技大学出版社. 2006.
[10] Uwe Meyer-Baese.数字信号处理的FPGA实现(第2版)刘凌译.清华大学出版社.2006. 148-157.
[11]夏宇闻. Verilog数字系统设计教程.北京:北京航空航天大学出版社. 2003. 6-7.
[12] Sawasd Tantaratana . Noncoherent Sequential Acquisition of PN Sequence for DS/SS Communications with/without Channel Fading, IEEE Trans.,1995(43). 1738~1745.
[13] Bernard Sklar.数字通信-基础与应用(第二版),徐平平等译.电子工业出版社,2002.
[14]周立功等. SOPC嵌入式系统基础教程.北京:北京航空航天大学出版社. 2006. 1~3.
[15] Texas Instruments. ADS5424 Data Sheet. 2009.
[16] Texas Instruments. THS5671a Data Sheet. 2009.
[17]郭梯云,邬国扬,李建东编著.移动通信(第三版).西安:西安电子科技大学出版社,2005. 133~146.
[18] JAVIER VALLS“Evaluation of CORDIC Algorithms for FPGA Design”Journal of VLSI Signal Processing 32,207-222, 20022002 Kluwer Academic Publishers. Manufactured in the Netherlands.
[19]丁玉美,高西全.数字信号处理(第二版).西安:西安电子科技大学出版社,2000.
[20]张万年,张宗橙,郑宝玉.数字通信(第四版).北京:电子工业出版社, 2007.
[21]刘波.精通Verilog HDL语言编程.北京:电子工业出版社,2007.
[22]徐度.短波宽带通信系统关键算法的FPGA实现.硕士学位论文.西安电子科技大学,2010.
[23]任爱锋,初秀琴,常存等.基于FPGA的嵌入式系统设计.西安:西安电子科技大学出版社,2004.
[24] Xilinx Corporation. Interfacing Xilinx FPGAs to TI DSP Platforms Using the EMIF Application Note XAPP753. January 29,2007.