球载观测系统的无线图像传输系统设计
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摘要
为实现系留气球观测系统轻量化无线图像高速稳定传输,文中采用了ZYNQ+AD9361硬件架构和正交频分复用技术实现无线图像传输系统设计。ZYNQ的FPGA部分实现了与AD9361射频前端的数字接口,与ZYNQ的ARM部分的数据通道,以及基于IEEE 802.11a标准的基带处理器物理层。ARM部分运行Linux操作系统,可在该系统上完成对AD9361配置的应用程序的开发、物理层管理以及与上位机和摄像机的数据交互。无线图像传输系统的引入,实现了空中系留气球观测平台与地面控制中心点对点的无线图像传输,增强了系留气球观测系统目标监测的可靠性。该通信系统结合了软件无线电系统灵活性配置、正交频分复用技术频谱利用率高以及抗多径效应等优点,能够随着系留气球观测系统应用于各种复杂环境中。
In order to achieve lightweight and high-speed wireless transmission of images in the tethered balloons observation system, hardware architecture ZYNQ+AD936 orthogonal frequency division multiplexing technology was adopted. The digital interface with AD9361 RF front end, the ARM part data channel with ZYNQ, as well as the physical layer of baseband processor based on IEEE802.11 a standard could be realized through FPGA part of ZYNQ. The ARM section ran the Linux operating system, where the development of AD9361 configuration applications, physical layer management, and data interaction with the host computer and the camera could be achieved. The introduction of wireless image transmission system accomplished the point to point wireless image transmission between the air balloon observation platform and the ground control center, enhancing the reliability of tethered balloons target monitoring observation system. The proposed communication system combined the merits of software radio system, flexible configuration and orthogonal frequency division multiplexing spectrum of high utility and anti-multipath effect, thus it could be applied to a variety of complex environments with the tethered balloon observation system.
In order to achieve lightweight and high-speed wireless transmission of images in the tethered balloons observation system, hardware architecture ZYNQ+AD936 orthogonal frequency division multiplexing technology was adopted. The digital interface with AD9361 RF front end, the ARM part data channel with ZYNQ, as well as the physical layer of baseband processor based on IEEE802.11 a standard could be realized through FPGA part of ZYNQ. The ARM section ran the Linux operating system, where the development of AD9361 configuration applications, physical layer management, and data interaction with the host computer and the camera could be achieved. The introduction of wireless image transmission system accomplished the point to point wireless image transmission between the air balloon observation platform and the ground control center, enhancing the reliability of tethered balloons target monitoring observation system. The proposed communication system combined the merits of software radio system, flexible configuration and orthogonal frequency division multiplexing spectrum of high utility and anti-multipath effect, thus it could be applied to a variety of complex environments with the tethered balloon observation system.
引文
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[13] 肖袅,赵璐,牛宝.基于LDPC-OFDM编码调制在无源光网络的研究[J].电子科技,2016,29(4):154-157. Xiao Niao,Zhao Lu,Niu Bao.Research on simulation of LDPC-OFDM coded modulation based on passive optical network[J].Electronic Science and Technology,2016,29(4): 154-157.
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[16] Lee H,Lee J.Joint clock and frequency synchronization for OFDM-based cellular systems[J].IEEE Signal Processing Letters,2011,18(12):757-760.
[2] 周晓波,于长青.高速长距离的光纤通信传输系统设计[J].激光杂志,2017,38(9):111-114. Zhou Xiaobo,Yu Changqing.Design of high speed and long distance fiber communication system[J].Laser Journal,2017,38(9):111-114.
[3] 高原.基于FPGA的软件软件无线电系统研究[D].北京: 北京理工大学,2014. Gao Yuan.The research of software defined radio system based on FPGA[D].Beijing:Beijing Institute of Technology,2014.
[4] 郑涛,王丹,施璟,等.基于FPGA的软件无线接收平台设计[J].软件,2013,34(4):26-28. Zhen Tao,Wang Dan,Shi Hao,et al.Software radio receiver design based on FPGA[J].Software,2013,34(4):26-28.
[5] 刘威,李莉,陈海燕,等.基于FPGA的软件无线电同步系统设计与实现[J].电子器件,2014,37(4):674-678. Liu Wei,Li Li,Chen Haiyan,et al.The design and implementation of software radio synchronization system based on FPGA[J].Electronic Device,2014,37(4): 674-678.
[6] 乔颢,齐建中,宋鹏.基于FPGA的无线图像传输系统硬件设计与实现[J].无线电工程,2017,47(8):27-30. Qiao Hao,Qi Jianzhong,Song Peng. Hardware design and implementation of wireless image transmission system based on FPGA[J].Radio Engineering,2017,47(8):27-30.
[7] 丁鹏仁.基于ZYNQ的软件无线电平台设计与实现[D]. 北京:北京邮电大学, 2015. Ding Pengren.Research and implementation of a ZYNQ-based software defined radio[D].Beijing:Beijing University of Posts and Telecommunications,2015.
[8] 王莹.Xilinx可扩展处理平台:ZYNQ嵌入式处理器与FPGA集成的独特创举[J].电子产品世界,2012,2(2): 27-32. Wang Ying.Xilinx extensible processing platform: the unique creation of the integration of ZYNQ embedded processors and FPGA[J].World of Electronic Products, 2012,2(2):27-32.
[9] 华抒军.基于Zedboard的软件无线电平台的设计与实现[J].软件,2015,36(10):57-60. Hua Shujun.Design and implementation for software platform of Zedboard-based software radio[J].Software, 2015,36(10):57- 60.
[10] 姜浩,张治.基于AD9361的软件无线电平台设计与实现[J].电视技术,2015,39(15):51-54. Jiang Hao,Zhang Zhi.Study on software defined radio system based on AD9361[J].Television Technology,2015, 39(15):51-54.
[11] 史治国,洪少华,陈抗生.基于Xilinx FPGA的OFDM通信系统基带设计[M].杭州:浙江大学出版社, 2009. Shi Zhiguo,Hong Shaohua,Chen Kangsheng.Baseband design of OFDM communication system based on Xilinx FPGA[M].Hangzhou:Zhejiang University Press,2009.
[12] 崔丽珍,曹成,赵晓燕.基于IEEE 802.11a的OFDM的帧检测算法研究与FPGA实现[J].电子技术与应用,2012, 38(8): 96-99. Cui Lizhen,Cao Cheng,Zhao Xiaoyan.The frame detection algorithm[J].Electronic Technology and Application,2012, 38(8):96-99.
[13] 肖袅,赵璐,牛宝.基于LDPC-OFDM编码调制在无源光网络的研究[J].电子科技,2016,29(4):154-157. Xiao Niao,Zhao Lu,Niu Bao.Research on simulation of LDPC-OFDM coded modulation based on passive optical network[J].Electronic Science and Technology,2016,29(4): 154-157.
[14] 纪峰,田其正,鲍进,等.基于OFDM窄带载波通讯技术的研究与应用[J].电测与仪表,2015,52(15):113-119. Ji Feng,Tian Qizheng,Bao Jin,et al.Research and application of OFDM-based narrowband carrier communication technology[J].Electrical Measurement and Instrument,2015,52(15):113-119.
[15] 党健.OFDM系统中同步与信道估计技术的研究[D].西安:西安电子科技大学, 2010. Dang Jian.Research on synchronization and channel estimation in OFDM system[D].Xi’an:Xidian University,2010.
[16] Lee H,Lee J.Joint clock and frequency synchronization for OFDM-based cellular systems[J].IEEE Signal Processing Letters,2011,18(12):757-760.