航空信道下一种OFDM子载波调制识别方法
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摘要
针对航空信道下OFDM子载波调制方式识别问题,提出了基于高阶累积量和幅度均值的联合特征提取方法,给出了基于高阶累积量和幅度均值的联合特征调制识别方法步骤,分析了在高斯信道环境和航空信道环境下方法的识别性能,研究了子载波数和信道多普勒频移对识别性能的影响.仿真结果表明,子载波数越多和多普勒频移越小,则识别性能越好;与已有方法相比,本文方法具有更高的识别准确率.
Aiming at the identification of OFDM subcarrier modulation mode in aviation channel, this paper proposes a joint feature extraction method based on high order cumulant and amplitude mean, and presents the steps of joint feature modulation identification method based on high order cumulant and amplitude mean. The paper also analyzes the identification performance of the method in Gaussian channel environment and aeronautical channel environment, and makes a study on the effects of subcarrier number and channel Doppler frequency shift on the identification performance. Simulation results show that the higher the number of subcarriers and the smaller the Doppler frequency shift, the better the identification performance, and that compared with existing methods,the proposed method has higher identification accuracy.
Aiming at the identification of OFDM subcarrier modulation mode in aviation channel, this paper proposes a joint feature extraction method based on high order cumulant and amplitude mean, and presents the steps of joint feature modulation identification method based on high order cumulant and amplitude mean. The paper also analyzes the identification performance of the method in Gaussian channel environment and aeronautical channel environment, and makes a study on the effects of subcarrier number and channel Doppler frequency shift on the identification performance. Simulation results show that the higher the number of subcarriers and the smaller the Doppler frequency shift, the better the identification performance, and that compared with existing methods,the proposed method has higher identification accuracy.
引文
[1]王宇扬.数字通信信号调制识别与参数估计[D].南京:南京理工大学,2014:1-2.
[2]PUNCHIHEWA A,ZHANG Q,DOBRE O A,et al.On the cyclostationarity of OFDM and single carrier linearly digitally modulated signals in time dispersive channels:theoretical developments and application[J].IEEE Transactions on Wireless Communications,2010,9(8):2588-2599.
[3]周玉娟,程韧.OFDM信号调制类型盲检测研究[J].通信技术,2008,41(1):4-5.
[4]安宁,李兵兵,黄敏.自适应OFDM系统子载波调制方式盲识别算法[J].西北大学学报(自然科学版),2011,41(2):231-234.
[5]刘明骞,李兵兵,赵雷,等.含有导频的OFDM信号子载波的调制方式识别方法[J].北京邮电大学学报,2012,35(4):42-45.
[6]张海川,雷迎科.基于MFCC的OFDM信号子载波调制方式识别方法[J].导弹与制导学报,2016,36(6):166-170.
[7]元洪波,王珂.航空信道下MPSK类信号的调制识别[J]信号处理,2013,29(2):249-255.
[8]WONG M L D,TING Sie-King,NANDI A K.Na?ve Byayes classification of adaptive broadband wireless modulation schemes with higher order cumulants[C]//IEEE Proceedings of 2nd International Conference on Signal Processing and Communication Systems.IEEE,2008:1-5.
[9]张泽君,程伟,杨瑞娟,等.航空信道下一种通信电台个体识别方法[J].空军预警学院学报,2016,30(2):106-110.
[10]任玉静.常用数字信号调制样式的自动识别[D].保定:河北大学,2010:13-19.
[11]刘明骞,李兵兵,赵雷.多径信道下OFDM信号子载波的调制方式识别新方法[J].西安电子科技大学学报(自然科学版),2011,38(5):20-26.
[12]谭晓衡,褚国星,张雪静,等.基于高阶累积量和小波变换的调制识别算法[J].系统工程与电子技术,2018,40(1):171-177.
[13]赵雄文,郭春霞,李景春.基于高阶累积量和循环谱的信号调制方式混合识别[J].电子与信息学报,2016,38(3):674-680.
[14]甘新泰,程伟,胡登鹏,等.数字卫星通信信号调制方式识别方法研究[J].空军预警学院学报,2014,28(2):111-115.
[2]PUNCHIHEWA A,ZHANG Q,DOBRE O A,et al.On the cyclostationarity of OFDM and single carrier linearly digitally modulated signals in time dispersive channels:theoretical developments and application[J].IEEE Transactions on Wireless Communications,2010,9(8):2588-2599.
[3]周玉娟,程韧.OFDM信号调制类型盲检测研究[J].通信技术,2008,41(1):4-5.
[4]安宁,李兵兵,黄敏.自适应OFDM系统子载波调制方式盲识别算法[J].西北大学学报(自然科学版),2011,41(2):231-234.
[5]刘明骞,李兵兵,赵雷,等.含有导频的OFDM信号子载波的调制方式识别方法[J].北京邮电大学学报,2012,35(4):42-45.
[6]张海川,雷迎科.基于MFCC的OFDM信号子载波调制方式识别方法[J].导弹与制导学报,2016,36(6):166-170.
[7]元洪波,王珂.航空信道下MPSK类信号的调制识别[J]信号处理,2013,29(2):249-255.
[8]WONG M L D,TING Sie-King,NANDI A K.Na?ve Byayes classification of adaptive broadband wireless modulation schemes with higher order cumulants[C]//IEEE Proceedings of 2nd International Conference on Signal Processing and Communication Systems.IEEE,2008:1-5.
[9]张泽君,程伟,杨瑞娟,等.航空信道下一种通信电台个体识别方法[J].空军预警学院学报,2016,30(2):106-110.
[10]任玉静.常用数字信号调制样式的自动识别[D].保定:河北大学,2010:13-19.
[11]刘明骞,李兵兵,赵雷.多径信道下OFDM信号子载波的调制方式识别新方法[J].西安电子科技大学学报(自然科学版),2011,38(5):20-26.
[12]谭晓衡,褚国星,张雪静,等.基于高阶累积量和小波变换的调制识别算法[J].系统工程与电子技术,2018,40(1):171-177.
[13]赵雄文,郭春霞,李景春.基于高阶累积量和循环谱的信号调制方式混合识别[J].电子与信息学报,2016,38(3):674-680.
[14]甘新泰,程伟,胡登鹏,等.数字卫星通信信号调制方式识别方法研究[J].空军预警学院学报,2014,28(2):111-115.