无线光通信中DPIM的调制/解调研究与FPGA实现  

Research and FPGA implementation of DPIM modulation and demodulation in free-space optical communication

作　　者：毛昕蓉[1] 汪乐意 冀汶莉[1] MAO Xinrong;WANG Leyi;JI Wenli(Information and Telecommunication Engineering College, Xi＇an University of Science ＆ Technology, Xi＇an 710054, China)

机构地区：[1]西安科技大学通信与信息工程学院,西安710054

出　　处：《光通信技术》2018年第6期42-45,共4页Optical Communication Technology

基　　金：西安科技大学教学改革研究项目(编号:ZX16032)资助;陕西省教育厅专项(编号:14JK1478)资助

摘　　要：为了满足无线光通信系统的低功率高可靠性需求,可在无线光通信系统中利用FPGA实现数字脉冲间隔调制(DPIM)。在研究了DPIM的调制原理基础上,运用Verilog HDL语言完成了基于FPGA的DPIM调制器与解调器设计,该设计通过改变随机存取存储器(RAM)模块的大小解决了DPIM中因时隙长短不固定所产生的问题。采用m序列作为输入数据进行仿真后,调制波形正确,解调出的数据无误,对DPIM调制器进行的硬件测试效果良好。In order to meet the low power and high reliability requirements of free-space optical communication system, the FPGA can be used to implement DPIM in free-space optical communication system. Based on the study of DPIM modulation principle, this paper uses Verilog HDL language to complete the design of FPGA-based DPIM modulator and demodulator. By changing the size of RAM module, the problem caused by the unbalanced time slot in DPIM modulation is solved. After using the m sequence as the input data to simulate this design, the modulation waveform is correct, the demodulated data is correct, and the hardware test of the DPIM modulator is good.

关 键 词：无线光通信 数字脉冲间隔调制 现场可编程门阵列 

分 类 号：TN929.12[电子电信—通信与信息系统]