Please wait a minute...
浙江大学学报(工学版)
J4  2011, Vol. 45 Issue (6): 1027-1031    DOI: 10.3785/j.issn.1008-973X.2011.06.010
无线电电子学、电信技术     
2FSK信号DSTFT解调算法中的同步新方法
金文光, 张正宇, 唐少华
浙江大学 信息与电子工程学系,浙江 杭州 310027
New method for synchronization in DSTFT demodulation
algorithm of 2FSK signal
JIN Wen-guang, ZHANG Zheng-yu, TANG Shao-hua
Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
 全文: PDF  HTML
摘要：

针对FSK调制信号在离散短时傅里叶变换(DSTFT)解调算法中的同步问题,通过分析比较2FSK信号的谱图与码元偏移之间的特定关系,提出一种基于谱图的同步新算法,即将信号接收过程分为码元起始点捕获过程和码元跟踪过程,针对不同的接收过程采用不同的同步算法.MATLAB仿真结果表明：在相同信噪比的情况下,采用基于谱图的同步算法比其他同步算法解调的误码率更低.该同步算法已用于实际的NAVTEX接收机中,接收灵敏度满足NAVTEX检测标准：当输入信号强度为-107 dBm时,误码率小于4%, 并且接收机已成功接收、解调出国际通道信息.
Abstract:

How to synchronize the signal is a core issue in discrete short-time Fourier transform (DSTFT) demodulation algorithm for FSK signal. A new synchronous algorithm based on spectrum was proposed by analyzing and comparing the specific relationship between spectrum of 2FSK signal and code shifting, which divides the whole signal reception process into two parts—the capturing process and the tracking process, and different synchronous algorithm is adopted for different process. MATLAB simulation indicates that the character error rate is much lower than one of the other synchronous algorithms when the signal-noise ratio is comparative. Meanwhile, the synchronous algorithm has been used in actual NAVTEX receiver, the sensitivity of which meets the testing standards of NAVTEX: the character error rate is below 4% when the intensity of input signal is -107 dBm, and the receiver successfully received and demodulated the information of international channel.
出版日期: 2011-07-14
:  TN 911.72  
作者简介: 金文光(1966—),男,副教授,博士,从事无线通信、信号处理与嵌入式系统设计研究.E-mail: jinguang@zju.edu.cn
服务　　
把本文推荐给朋友
加入引用管理器
E-mail Alert
作者相关文章　　

引用本文:

金文光, 张正宇, 唐少华. 2FSK信号DSTFT解调算法中的同步新方法[J]. J4, 2011, 45(6): 1027-1031.

JIN Wen-guang, ZHANG Zheng-yu, TANG Shao-hua. New method for synchronization in DSTFT demodulation
algorithm of 2FSK signal. J4, 2011, 45(6): 1027-1031.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2011.06.010    或    https://www.zjujournals.com/eng/CN/Y2011/V45/I6/1027

［1］ 金文光,杨雯,唐少华.奈伏泰斯系统信号解调算法综述［J］.中国航海,2008,31(2): 100-104.
JIN Wenguang, YANG wen, TANG Shaohua. Survey of demodulation algorithms in NAVTEX receiver［J］. Navigation of China, 2008, 31(2): 100-104.
［2］ 约翰逊等.软件无线电［M］.北京：机械工业出版社,2008: 21-27.
［3］ 王楠,古瑞江,于红毅.一种新型的FSK解调系统设计［J］.通信技术,2008,41(9): 29-31.
WANG Nan, GU Ruijiang, YU Hongyi. A novel design of FSK demodulation system［J］. Communications Technology, 2008,41(9): 29-31.
［4］ 李伟光,李静,葛林东.一种基于DSTFT解调FSK信号的改进方法［J］.现代电子技术,2003,26(6): 26-28.
LI Weiguang, LI Jing, GE lindong. A effective method to demodulate FSK signal realizing with DSP［J］. Modern Electronic Technique, 2003, 26(6): 26-28.
［5］ 赵任才,孙钢,郭军.基于模式识别的短波ALE系统的8FSK信号解调［J］. 电讯技术,2004,44(5): 19-21.
ZHAO Rencai, SUN Gang, GUO Jun. Demodulation of 8FSK signal for HF automatic Establishment system based on pattern recognition ［J］.Telecommunication Engineering, 2004, 44(5): 19-21.
［6］ JURADO Francisco, SAENZ Jose’R. Comparison between discrete STFT and wavelets for the analysis of power quality events［J］. Electric Power Systems Research, 2002, 62(3): 183-190.
［7］ 胡延平,李纲,王展,等.一种基于DSTFT解调2FSK信号的新方法［J］.通信学报,2000,21(6): 54-59.
HU Yanping, LI Gang, WANG Zhan, et al. A new method to demodulate 2FSK signal using discrete short time fourier transform［J］.Journal of China Institute of Communications, 2000, 21(6): 54-59.
［8］ 米托拉著.软件无线电体系结构：应用于无线系统工程中的面向对象的方法［M］.北京：机械工业出版社,2003: 303308.
［9］ 陈晨,赵民建,陈文正.单载波频域均衡技术的定时同步研究［J］.浙江大学学报:工学版,2007,41(3): 445-449.
CHEN Chen, ZHAO Minjian, CHEN Wenzheng. Timing Synchronization for SCFDE［J］. Journal of Zhejiang University: Engineering Science, 2007,41(3): 445-449.
［10］ IEC. IEC 610976. Global maritime distress and safety system (GMDSS)Part6: Narrowband directprinting telegraph equipment for the reception of navigational and meteorological warnings and urgent information to ships (NAVTEX)［S］. Geneva: IEC Central Office, 2005.
［11］ 金文光,唐少华,张正宇. 中英文奈伏泰斯接收机软件设计和实现［J］. 中国航海,2009,32(3)： 1-5.
JIN Wenguang, TANG Shaohua, ZHANG Zhengyu. Software design and its realization of bilingual NAVTEX receiver［J］. Navigation of China, 2009, 32(3): 1-5.
[1] 刘志坤, 刘忠, 付学志, 宁小玲. 改进的变步长自适应滤波及Eckart加权抑噪算法[J]. J4, 2012, 46(6): 1014-1020.
[2] 张少蔚, 徐东, 袁博, 赖晓平. 复数FIR滤波器椭圆误差约束最小二乘设计[J]. J4, 2010, 44(7): 1338-1342.