应用光学
應用光學
응용광학
JOURNAL OF APPLIED OPTICS
2010年
2期
180-184
,共5页
自由空间光通信(FSO)%准同步数据复接%择多判决%现场可编程门阵列(FPGA)
自由空間光通信(FSO)%準同步數據複接%擇多判決%現場可編程門陣列(FPGA)
자유공간광통신(FSO)%준동보수거복접%택다판결%현장가편정문진렬(FPGA)
FSO%plesiochronous digital multiplexer%majority decision%FPGA
为了实现多路信号在同一大气信道中的传输,提出一种适用于自由空间光通信(FSO)系统的准同步数字复接方案.该方案利用数字复接扩大传输容量,通过加入滤波模块和采用择多判决的方法,提高系统的抗干扰能力.整个系统采用自顶向下模块化的方法进行设计,所有功能模块均用VHDL语言进行描述,并用现场可编程门阵列(FPGA)芯片EP1C3T100C6对整个系统进行硬件实现.以三路准同步数字信号的复接分接为例,给出了软件仿真和硬件实验结果.结果表明系统可以准确、可靠地实现三路准同步信号的复接分接.
為瞭實現多路信號在同一大氣信道中的傳輸,提齣一種適用于自由空間光通信(FSO)繫統的準同步數字複接方案.該方案利用數字複接擴大傳輸容量,通過加入濾波模塊和採用擇多判決的方法,提高繫統的抗榦擾能力.整箇繫統採用自頂嚮下模塊化的方法進行設計,所有功能模塊均用VHDL語言進行描述,併用現場可編程門陣列(FPGA)芯片EP1C3T100C6對整箇繫統進行硬件實現.以三路準同步數字信號的複接分接為例,給齣瞭軟件倣真和硬件實驗結果.結果錶明繫統可以準確、可靠地實現三路準同步信號的複接分接.
위료실현다로신호재동일대기신도중적전수,제출일충괄용우자유공간광통신(FSO)계통적준동보수자복접방안.해방안이용수자복접확대전수용량,통과가입려파모괴화채용택다판결적방법,제고계통적항간우능력.정개계통채용자정향하모괴화적방법진행설계,소유공능모괴균용VHDL어언진행묘술,병용현장가편정문진렬(FPGA)심편EP1C3T100C6대정개계통진행경건실현.이삼로준동보수자신호적복접분접위례,급출료연건방진화경건실험결과.결과표명계통가이준학、가고지실현삼로준동보신호적복접분접.
The paper puts forward a solution of plesiochronous data multiplexer for a free space optical (FSO) system, which makes full use of the capability of digital multiplexer by expanding the transfer capacity, the method takes majority decision measures and uses filter modules which greatly improved the reliability of the whole system. The system was designed by taking TOP DOWN method. All of the functional modules were described in VHDL. The whole system was accomplished by FPGA chip EP1C3T100C6. Taking the multiplexing of three plesiochronous digital as example, the result of simulation agrees with the experiment result. It is concluded that the solution can greatly reduce interference signals and transfer plesiochronous data signal in FSO accurately and reliably.
