跳频OFDM系统的设计与FPGA实现
发布时间：2018-12-28 06:43
【摘要】：跳频OFDM (Orthogonal Frequency Division Multiplexing)是一种将跳频技术与OFDM技术相结合的新型高速通信系统,不仅具有跳频技术的抗干扰能力强等优点,还具有OFDM技术较高频谱利用率、抗多径干扰等优点。跳频OFDM系统支持高速数据传输,是未来移动通信发展的方向之一。本文以跳频系统和OFDM系统的基本原理出发,在详细研究了跳频系统的各项性能指标和OFDM系统关键技术的基础上,给出了跳频OFDM通信系统的设计方案。采用64QAM映射完成数据映射；采用快速傅里叶变换完成OFDM调制和解调；采用DDS技术设计了跳频器；采用低通滤波、码元判决方式解出信源数据。本设计在Xilinx公司的ISE 10.1开发环境下,运用Verilog硬件描述语言编程,采用Synplify Pro工具进行综合,并得到相应的寄存器传输级(Register-Transfer Layer,RTL)的设计电路图,通过Modelsim 6.5a仿真工具进行功能仿真。最后将跳频OFDM系统下载到Xilinx公司生产的Spartan-3E硬件平台,通过Chipscope在电脑端观察测试结果,并对仿真及测试结果进行分析。仿真与测试结果表明：设计的跳频OFDM系统能够正确实现64QAM映射和逆映射、OFDM调制和解调、跳频和解跳、低通滤波和码元判决等各个模块功能,可以正确实现FH-OFDM信号的发送,部分实现FH-OFDM信号的接收,基本满足对跳频OFDM系统的设计要求。
[Abstract]:Frequency hopping (OFDM (Orthogonal Frequency Division Multiplexing) is a new high speed communication system which combines frequency hopping technology with OFDM technology. It not only has the advantages of strong anti-interference ability of frequency-hopping technology, but also has the advantages of high spectrum efficiency and anti-multipath interference of OFDM technology. Frequency-hopping OFDM system supports high-speed data transmission, which is one of the development directions of mobile communication in the future. Based on the basic principles of frequency hopping system and OFDM system, this paper presents the design scheme of frequency hopping OFDM communication system based on the detailed study of each performance index of frequency hopping system and the key technology of OFDM system. The 64QAM mapping is used to complete the data mapping, the fast Fourier transform is used to complete the OFDM modulation and demodulation, the frequency hopper is designed by using DDS technology, and the source data is solved by low-pass filtering and symbol decision. Under the development environment of ISE 10.1 of Xilinx Company, this design uses Verilog hardware description language to program, uses Synplify Pro tool to synthesize, and obtains the corresponding design circuit diagram of register transfer level (Register-Transfer Layer,RTL). The function is simulated by Modelsim 6.5a simulation tool. Finally, the frequency-hopping OFDM system is downloaded to the Spartan-3E hardware platform produced by Xilinx Company, and the test results are observed and analyzed through Chipscope on the computer. The simulation and test results show that the designed FH OFDM system can correctly realize the functions of 64QAM mapping and inverse mapping, OFDM modulation and demodulation, frequency hopping and de-hopping, low-pass filtering and symbol decision, and can correctly realize the transmission of FH-OFDM signals. Part of the realization of FH-OFDM signal reception, basically meet the frequency hopping OFDM system design requirements.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN914.41
本文编号：2393613
[Abstract]:Frequency hopping (OFDM (Orthogonal Frequency Division Multiplexing) is a new high speed communication system which combines frequency hopping technology with OFDM technology. It not only has the advantages of strong anti-interference ability of frequency-hopping technology, but also has the advantages of high spectrum efficiency and anti-multipath interference of OFDM technology. Frequency-hopping OFDM system supports high-speed data transmission, which is one of the development directions of mobile communication in the future. Based on the basic principles of frequency hopping system and OFDM system, this paper presents the design scheme of frequency hopping OFDM communication system based on the detailed study of each performance index of frequency hopping system and the key technology of OFDM system. The 64QAM mapping is used to complete the data mapping, the fast Fourier transform is used to complete the OFDM modulation and demodulation, the frequency hopper is designed by using DDS technology, and the source data is solved by low-pass filtering and symbol decision. Under the development environment of ISE 10.1 of Xilinx Company, this design uses Verilog hardware description language to program, uses Synplify Pro tool to synthesize, and obtains the corresponding design circuit diagram of register transfer level (Register-Transfer Layer,RTL). The function is simulated by Modelsim 6.5a simulation tool. Finally, the frequency-hopping OFDM system is downloaded to the Spartan-3E hardware platform produced by Xilinx Company, and the test results are observed and analyzed through Chipscope on the computer. The simulation and test results show that the designed FH OFDM system can correctly realize the functions of 64QAM mapping and inverse mapping, OFDM modulation and demodulation, frequency hopping and de-hopping, low-pass filtering and symbol decision, and can correctly realize the transmission of FH-OFDM signals. Part of the realization of FH-OFDM signal reception, basically meet the frequency hopping OFDM system design requirements.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN914.41
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1 段永颢;孙宇明;赵鹏;;跳频OFDM通信系统同步算法及实现[J];通信技术;2012年06期
相关硕士学位论文 前1条
1 赵岩;跳频通信系统抗干扰性能研究[D];哈尔滨工业大学;2010年
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