对称三角线性调频水声通信信号的同步检测方法
|
摘要
同步捕获是水声通信中的重要环节。基于分数阶傅里叶变换(FRFT)可提高对称三角线性调频波(STLFM)的信号同步捕获精度。理论分析表明,对称三角线性调频波在同步窗口正确时,其分数阶傅里叶变换(FRFT)域上具有双尖峰对称性。利用FRFT域上两个尖峰的位置偏移可估计并矫正同步信号的多普勒频移与时间延迟,进而利用FRFT域上两个尖峰的峰值差可实现对同步跟踪环路的精细调整。水声传播仿真和五缘湾浅海信道测试结果表明,在相同时间带宽乘积情况下,所提同步方法的同步误差均值比线性调频(LFM)同步方法低1/3,同步误差均方误差上降低至1/5~1/10,具有更好的准确性和稳定性。
Synchronization detection plays the most important role in the underwater acoustic communication systems.It is discovered that the STLFM signal has double energy peaks in their 'optimal' fractional Fourier transform domain and these two peaks have symmetry in their amplitude if the STLFM signal is captured in the accurate time windows for the synchronizing. By taking its unique feature into account, a synchronization detection method based on the STLFM(Symmetrical Triangular Linear Frequency Modulation) is proposed in this paper. Both the simulation in multipath channels and outfield experiment results in the Wu-Yuan bay indicated its feasibility and superiority. It is shown that with the same product of pulse width and bandwidth, the proposed method has better accuracy and stability in the synchronization compared with the traditional method, for detail, the error mean has 1/3 reduction and the error variance has reduced to 1/5~1/10.
Synchronization detection plays the most important role in the underwater acoustic communication systems.It is discovered that the STLFM signal has double energy peaks in their 'optimal' fractional Fourier transform domain and these two peaks have symmetry in their amplitude if the STLFM signal is captured in the accurate time windows for the synchronizing. By taking its unique feature into account, a synchronization detection method based on the STLFM(Symmetrical Triangular Linear Frequency Modulation) is proposed in this paper. Both the simulation in multipath channels and outfield experiment results in the Wu-Yuan bay indicated its feasibility and superiority. It is shown that with the same product of pulse width and bandwidth, the proposed method has better accuracy and stability in the synchronization compared with the traditional method, for detail, the error mean has 1/3 reduction and the error variance has reduced to 1/5~1/10.
引文
1徐文,鄢社锋,季飞,陈景东等.海洋信息获取、传输、处理及融合前沿研究评述.中国科学:信息科学,2016;46(8):1053-1085
2 Soliman S S.Synchronization issues in ocean telemetry.IEEE Journal of Oceanic Engineering,1991;16(1):74-85
3 Mason S F,Berger C R,Zhou Shengli,Willett P.Detection,synchronization,and doppler scale estimation with multicarrier waveforms in underwater acoustic communication.IEEE Journal on Selected Areas in Communications,2008;26(9):1638-1649
4 Jiang Zhidi.Detecting of synchronization signal for underwater acoustic communication based on FPGA.International Conference on Electronics,2012:1420-1422
5 GUO Zheng,YAN Shefeng,XU Lijun,QIN Ye.Frame synchronization for underwater acoustic communication based on maximum likelihood estimation,Chinese Journal of Acoustic,2016;35(4):452-463
6 Liu Q Y,Luo Y,Gao S W,Ouyang C,Zhang Q.Multi-target parameter estimation in symmetry triangular LFMCW Radar based on envelope compensation.Acta Electronica Sinica,2016;44(3):541-547
7 Tang Jiang,Yongjun Zhao,Yang Kun.New method for detection and parameter estimation of STLFM signal.IET International Radar Conference 2013,2013:1-7
8 Lashkari B,Mandelis A.Linear frequency modulation photoacoustic radar:Optimal bandwidth and signal-to-noise ratio for frequency-domain imaging of turbid media.Journal of the Acoustical Society of America,2011;130(3):1313-1324
9刘大利,刘云涛,蔡惠智.水下连续波有源探测的回波检测算法.声学学报,2014;39(2):163-169
10杜鹏宇,郭龙祥,殷敬伟,乔钢.基于改进差分能量检测器的移动直扩水声通信研究.通信学报,2017;38(3):144-153
11宿绍莹,侯庆凯,任艳等.匹配滤波和去斜率脉压方法性能分析与比较.信号处理,2011;27(2):202-206
12 Marchetti L,Reggiannini R.An efficient receiver structure for sweep-spread-carrier underwater acoustic links.IEEE Journal of Oceanic Engineering,2016;41(2):440-449
13 Kebkal K G,Kebkal V K,Kebkal O G,Petroccia R.Underwater acoustic modems(S2CR Series)for synchronization of underwater acoustic networks clocks during payload data exchange.IEEE Journal of Oceanic Engineering,2016;41(2):428-439
14 Sharif B S,Neasham J,Hinton O R,Adams A E.A computationally efficient Doppler compensation system for underwater acoustic communications.IEEE Journal of Oceanic Engineering,2000;25(1):52-61
15 Wang K,Chen S,Liu C,Liu Y.Doppler estimation and timing synchronization of underwater acoustic communication based on hyperbolic frequency modulation signal.IEEE International Conference on Networking,2015;23(1):75-80
16 Wang R H,Huang J G,Ma T A,Zhang Q F.Improved space time prewhitener for linear frequency modulation reverberation using fractional Fourier transform.Journal of The Acoustical Society Of America,2010;128(6):EL361-EL365
17刘锋,徐会法,陶然.基于FRFT的对称三角LFMCW信号检测与参数估计·电子与信息学报,2011;33(8):1864-1869
18王逸林,陈韵,殷敬伟等.基于分数阶Fourier变换的正交多载波水声通信系统研究.通信学报,2012;33(8):162-170
19 Zhao Yanbo,Yu Hua,Wei Gang,Ji Fei,Chen Fangjong.Parameter estimation of wideband underwater acoustic multipath channels based on fractional Fourier transform.IEEE Transactions on Signal Processing,2016;64(20):5396-5408
20陈艳丽,郭良浩,宫在晓.简明分数阶傅里叶变换及其对线性调频信号的检测和参数估计.声学学报,2015;40(6):761-771
2 Soliman S S.Synchronization issues in ocean telemetry.IEEE Journal of Oceanic Engineering,1991;16(1):74-85
3 Mason S F,Berger C R,Zhou Shengli,Willett P.Detection,synchronization,and doppler scale estimation with multicarrier waveforms in underwater acoustic communication.IEEE Journal on Selected Areas in Communications,2008;26(9):1638-1649
4 Jiang Zhidi.Detecting of synchronization signal for underwater acoustic communication based on FPGA.International Conference on Electronics,2012:1420-1422
5 GUO Zheng,YAN Shefeng,XU Lijun,QIN Ye.Frame synchronization for underwater acoustic communication based on maximum likelihood estimation,Chinese Journal of Acoustic,2016;35(4):452-463
6 Liu Q Y,Luo Y,Gao S W,Ouyang C,Zhang Q.Multi-target parameter estimation in symmetry triangular LFMCW Radar based on envelope compensation.Acta Electronica Sinica,2016;44(3):541-547
7 Tang Jiang,Yongjun Zhao,Yang Kun.New method for detection and parameter estimation of STLFM signal.IET International Radar Conference 2013,2013:1-7
8 Lashkari B,Mandelis A.Linear frequency modulation photoacoustic radar:Optimal bandwidth and signal-to-noise ratio for frequency-domain imaging of turbid media.Journal of the Acoustical Society of America,2011;130(3):1313-1324
9刘大利,刘云涛,蔡惠智.水下连续波有源探测的回波检测算法.声学学报,2014;39(2):163-169
10杜鹏宇,郭龙祥,殷敬伟,乔钢.基于改进差分能量检测器的移动直扩水声通信研究.通信学报,2017;38(3):144-153
11宿绍莹,侯庆凯,任艳等.匹配滤波和去斜率脉压方法性能分析与比较.信号处理,2011;27(2):202-206
12 Marchetti L,Reggiannini R.An efficient receiver structure for sweep-spread-carrier underwater acoustic links.IEEE Journal of Oceanic Engineering,2016;41(2):440-449
13 Kebkal K G,Kebkal V K,Kebkal O G,Petroccia R.Underwater acoustic modems(S2CR Series)for synchronization of underwater acoustic networks clocks during payload data exchange.IEEE Journal of Oceanic Engineering,2016;41(2):428-439
14 Sharif B S,Neasham J,Hinton O R,Adams A E.A computationally efficient Doppler compensation system for underwater acoustic communications.IEEE Journal of Oceanic Engineering,2000;25(1):52-61
15 Wang K,Chen S,Liu C,Liu Y.Doppler estimation and timing synchronization of underwater acoustic communication based on hyperbolic frequency modulation signal.IEEE International Conference on Networking,2015;23(1):75-80
16 Wang R H,Huang J G,Ma T A,Zhang Q F.Improved space time prewhitener for linear frequency modulation reverberation using fractional Fourier transform.Journal of The Acoustical Society Of America,2010;128(6):EL361-EL365
17刘锋,徐会法,陶然.基于FRFT的对称三角LFMCW信号检测与参数估计·电子与信息学报,2011;33(8):1864-1869
18王逸林,陈韵,殷敬伟等.基于分数阶Fourier变换的正交多载波水声通信系统研究.通信学报,2012;33(8):162-170
19 Zhao Yanbo,Yu Hua,Wei Gang,Ji Fei,Chen Fangjong.Parameter estimation of wideband underwater acoustic multipath channels based on fractional Fourier transform.IEEE Transactions on Signal Processing,2016;64(20):5396-5408
20陈艳丽,郭良浩,宫在晓.简明分数阶傅里叶变换及其对线性调频信号的检测和参数估计.声学学报,2015;40(6):761-771