星间高速激光通信解调器并行结构设计
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摘要
针对现有硬件条件难以满足星间高速激光通信Gbps以上的速率,给出了一种基于APRX架构的高速并行结构优化设计方案。该方案将数字下变频、匹配滤波等处理模块转化为并行结构,将时域卷积转换到频域相乘的方式实现高速匹配滤波,在系统主时钟受限的情况下进一步提高了处理速率,并对下变频、高速匹配滤波、FFT/IFFT实现结构做了简化,减少硬件资源消耗。仿真表明,该方案可以显著提高解调器处理速率并且不影响系统解调性能。
Aiming at the fact that the existing hardware conditions are hard to meet the rate of more than Gbps between high-speed laser communications in interstellar,a high-speed parallel architecture optimization scheme based on APRX architecture is designed. In this scheme,digital processing module such as down-conversion and matched filtering is transformed into parallel structure,high-speed matched filtering is realized by converting the time-domain convolution to frequency domain multiplication,and the processing speed is further increased under the condition that the main clock of the system is limited,It also simplifies the structure of down-conversion,high-speed matched filtering and FFT/IFFT to reduce the hardware resource consumption. Simulation shows that this scheme can significantly improve the demodulator processing rate and does not affect the system demodulation performance.
Aiming at the fact that the existing hardware conditions are hard to meet the rate of more than Gbps between high-speed laser communications in interstellar,a high-speed parallel architecture optimization scheme based on APRX architecture is designed. In this scheme,digital processing module such as down-conversion and matched filtering is transformed into parallel structure,high-speed matched filtering is realized by converting the time-domain convolution to frequency domain multiplication,and the processing speed is further increased under the condition that the main clock of the system is limited,It also simplifies the structure of down-conversion,high-speed matched filtering and FFT/IFFT to reduce the hardware resource consumption. Simulation shows that this scheme can significantly improve the demodulator processing rate and does not affect the system demodulation performance.
引文
[1]吴从均.星间激光通信终端及其实验室检测平台光学系统研究[D].北京:中国科学院大学,2014.
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[10]刘泽,苏开荣,姜玉洁,等.卫星通信中调制解调性能的研究[J].电子技术应用,2015,41(8):83-85.
[11]陈曦,邓振淼,焦计平.多通道高速相参同步数据采集与存储系统设计[J].电子测量技术,2013,36(12):104-107.
[12]王必成.基于Matlab的两种长序列滤波法实现与比较[J].数字通信世界,2016(3):310.
[13]段国栋,蒋小平,马速良,等.一种基于多相结构的高效数字下变频设计[J].电子技术应用,2014(4):52-55.
[14]曹继华.离散信号处理与应用[M].北京:机械工业出版社,2013.
[15]Lin C,Zhang J,Shao B. A Multi-Gigabit paralleldemodulator and its FPGA implementation[J]. IeiceTransactions on Fundamentals of ElectronicsCommunications&Computer Sciences, 2012,E95.A(8):1412-1415.
[16]张德智,曾星星,胡倩.基于并行处理技术的宽带直扩信号捕获方法[J].电子技术应用,2016,42(9):10-13.
[2] Gregory M,Heine F,K?mpfner H,et al. TESATlaser communication terminal performance resultson 5.6Gbit coherent inter satellite and satellite toground links[J]. SPIE,2017:37.
[3] Planche G,Laurent B,Guillen J C,et al. SILEXfinal ground testing and in-flight performance as-sessment[J]. Proceedings of SPIE-The Internation-al Society for Optical Engineering,1999(3615):64-77.
[4] Gregory M,Heine F F,Lange R. Commercialoptical inter-satellite communication at high data rates[J]. Optical Engineering,2012,51(51):1202.
[5]唐婷,杜瑜.全数字化高速数传解调器的设计与实现[J].科学技术与工程,2016,16(14):32-35.
[6]郎迪.高速数字解调器定时及载波同步技术研究与实现[D].成都:电子科技大学,2016.
[7]刘策伦,安建平,王翠莲,等.联合符号同步的低复杂度频域并行解调结构[J].空间电子技术,2013,10(2):17-20.
[8]刘旺,朱江,付永明,等.一种并行的定时同步环路实现研究[J].通信技术,2013(10):1-5.
[9] Srinivasan M,Chen C C,Grebowsky G,et al. Anall-digital high data-rate parallel receiver[J].Surface Science,1997,604(15-16):1294-1299.
[10]刘泽,苏开荣,姜玉洁,等.卫星通信中调制解调性能的研究[J].电子技术应用,2015,41(8):83-85.
[11]陈曦,邓振淼,焦计平.多通道高速相参同步数据采集与存储系统设计[J].电子测量技术,2013,36(12):104-107.
[12]王必成.基于Matlab的两种长序列滤波法实现与比较[J].数字通信世界,2016(3):310.
[13]段国栋,蒋小平,马速良,等.一种基于多相结构的高效数字下变频设计[J].电子技术应用,2014(4):52-55.
[14]曹继华.离散信号处理与应用[M].北京:机械工业出版社,2013.
[15]Lin C,Zhang J,Shao B. A Multi-Gigabit paralleldemodulator and its FPGA implementation[J]. IeiceTransactions on Fundamentals of ElectronicsCommunications&Computer Sciences, 2012,E95.A(8):1412-1415.
[16]张德智,曾星星,胡倩.基于并行处理技术的宽带直扩信号捕获方法[J].电子技术应用,2016,42(9):10-13.