一种用于NBDP的突发信号位定时同步方法
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摘要
虽然船舶水上移动通信业务中使用自动识别的窄带直接印字电报设备已投入多年,但国内关于窄带直接印字电报研究仍集中在系统仿真、操作实践等问题上。对于窄带直接印字电报的ARQ工作方式信号接收研究较少。针对ARQ信号所采用的无前导同步序列的突发通信方式,本文提出了一种无同步序列突发的位定时同步方法,该方法以ARQ工作方式中呼叫码字段为同步序列,并利用ARQ通信协议中固定的450ms呼叫周期特性实现ARQ信号的位定时同步。该方法不需要设计复杂的时钟调整电路,设计简单,易于数字化实现。
Although the narrow band direct printing equipment automatic identification of ship has been used for many years. However,the research on the narrow band direct printing still focuses on the system simulation,operation practice and so on. The research on the ARQ mode of the narrow band direct printing is less. A burst communication mode without preamble synchronization sequence for the ARQ signals is adopted. In this paper,a code synchronization method without burst sequence is proposed. The method calls the call code array in the ARQ mode as a synchronous sequence. The code synchronization of the ARQ signal is realized by using the fixed 450 ms call cycle characteristic in ARQ communication protocol. This method does not require the design of complex clock adjustment circuit. It is simple to be designed,and easy to be implemented.
Although the narrow band direct printing equipment automatic identification of ship has been used for many years. However,the research on the narrow band direct printing still focuses on the system simulation,operation practice and so on. The research on the ARQ mode of the narrow band direct printing is less. A burst communication mode without preamble synchronization sequence for the ARQ signals is adopted. In this paper,a code synchronization method without burst sequence is proposed. The method calls the call code array in the ARQ mode as a synchronous sequence. The code synchronization of the ARQ signal is realized by using the fixed 450 ms call cycle characteristic in ARQ communication protocol. This method does not require the design of complex clock adjustment circuit. It is simple to be designed,and easy to be implemented.
引文
[1]蒋效彬,任鸿翔,刘晶晶.船用NBDP通信设备的仿真实现与实操评估[J].科学技术与工程,2015(12):250-255.
[2]黄患.NBDP教学方法探讨[J].黑龙江教育,2015(4):40-42.
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[4]彭国祥,陈强.两种键控方式在短波数字通信中的性能比较[J].中国航海,2012(2):15-19.
[5]国际电联无线电通信部门.水上移动业务中使用自动识别的直接印字电报设备:ITU-R M.625-4建议书[S].日内瓦:国际电联,2012.
[6]胡亚,王永庆,吴嗣亮.利用频域连续性检测非合作突发通信信号[J].北京理工大学学报,2012(10):1071-1076.
[7]韩远致,胡爱群.信道衰落特性的功率检测法与冲击响应法的差异性[J].东南大学学报:自然科学版,2016,46(2):237-242.
[8]周圣,张天骐,陈适.基于滑动匹配功率谱分析的TD-SCDMA上行突发信号检测[J].计算机应用研究,2012(10):3865-3869.
[9](美)普罗科斯,(美)萨利希著,张力军等改编.数字通信(第五版.中文精简版)[M].北京:电子工业出版社,2012.
[10]樊昌信,张甫翊,徐炳祥,等.通信原理[M].7版.北京:国防工业出版社,2012.
[11]杜勇.数字通信同步技术的MATLAB与FPGA实现[M].北京:电子工业出版社,2013.
[12]杜亚琦,周建英.一种改进的早迟积分型位定时方法[J].电子设计工程,2015(4):152-154.
[13]杜亚琦,周建英.一种基于滑动积分的码元同步方法[J].电子设计工程,2016(7):17-19.
[14]张盼,钟升,张琦,等.一种降抖动的位同步环路设计与实现[J].电子设计工程,2017(12):138-140.
[15]高旭.水上通信业务中软件调制解调技术的研究[D].大连:大连海事大学,2014.
[16]周建英,杜亚琦.一种新的基于前导序列的MSK位定时同步方法[J].电子设计工程,2014(4):36-38.
[2]黄患.NBDP教学方法探讨[J].黑龙江教育,2015(4):40-42.
[3]杨庆宝.从编码技术谈船用窄带直接印字电报(NBDP)[J].天津航海,2013(3):47-49.
[4]彭国祥,陈强.两种键控方式在短波数字通信中的性能比较[J].中国航海,2012(2):15-19.
[5]国际电联无线电通信部门.水上移动业务中使用自动识别的直接印字电报设备:ITU-R M.625-4建议书[S].日内瓦:国际电联,2012.
[6]胡亚,王永庆,吴嗣亮.利用频域连续性检测非合作突发通信信号[J].北京理工大学学报,2012(10):1071-1076.
[7]韩远致,胡爱群.信道衰落特性的功率检测法与冲击响应法的差异性[J].东南大学学报:自然科学版,2016,46(2):237-242.
[8]周圣,张天骐,陈适.基于滑动匹配功率谱分析的TD-SCDMA上行突发信号检测[J].计算机应用研究,2012(10):3865-3869.
[9](美)普罗科斯,(美)萨利希著,张力军等改编.数字通信(第五版.中文精简版)[M].北京:电子工业出版社,2012.
[10]樊昌信,张甫翊,徐炳祥,等.通信原理[M].7版.北京:国防工业出版社,2012.
[11]杜勇.数字通信同步技术的MATLAB与FPGA实现[M].北京:电子工业出版社,2013.
[12]杜亚琦,周建英.一种改进的早迟积分型位定时方法[J].电子设计工程,2015(4):152-154.
[13]杜亚琦,周建英.一种基于滑动积分的码元同步方法[J].电子设计工程,2016(7):17-19.
[14]张盼,钟升,张琦,等.一种降抖动的位同步环路设计与实现[J].电子设计工程,2017(12):138-140.
[15]高旭.水上通信业务中软件调制解调技术的研究[D].大连:大连海事大学,2014.
[16]周建英,杜亚琦.一种新的基于前导序列的MSK位定时同步方法[J].电子设计工程,2014(4):36-38.