摘要
多层多参数加权分数阶傅里叶变换凭借其多控制参数和信号伪装特性,成为提高通信系统保密性的研究热点。为提高多层多参数加权分数阶傅里叶变换调制信号的抗窃听性,提出了一种时分调制的多层多参数加权分数阶傅里叶变换信号产生方法,该方法通过对旋转系数的奇偶性判定,进行不同旋转系数的时分调制,进一步丰富了加权分数阶傅里叶变换的控制参数数量。仿真结果表明,时分调制信号的功率谱特性、时域波形特性及星座图特性与未经过时分调制的信号相同,且通过此方法产生的信号可有效降低第三方的截获参数的概率;当第三方旋转系数偏差0.2时,误码率为10^(-1)时,可提高信噪比约6dB,进一步提高抗扫描性和抗窃听性。
With the characteristics of multi-parameter controller and signal camouflage,the Multi-Layer Multi-Parameter Weighted Fractional Fourier Transform(ML-MP-WFRFT)has been the research hotspot in security communication system,which is called a new physical layer secret communication method according to its good anti-modulation identification performance.In order to improve the anti-interception performance of the ML-MP-WFRFT,a signal producing method based on Time Division Modulation Multi-Layer Multi-Parameter Weighted Fractional Fourier Transform(TM-ML-MP-WFRFT)was proposed.In this method,the Time Division Modulation mechanism was used in different rotation factor by its parity judgement,which can enrich the numbers of Weighted Fractional Fourier Transform(WFRFT)control parameters.The simulation results show that the time domain waveform,the power spectrum density(PSD)and the constellation characteristics of the TM-ML-MPWFRFT signal is similarly with the ML-MP-WFRFT signal,and the TM-ML-MP-WFRFT signal can effectively reduce the ability of the eavesdropper to decipher,and improve the anti-scanning and anti-eavesdropping performance of the signal.When the deviation of the rotation factor is 0.2 and Error Bit Rating(BER)is 10^(-1),the TM-ML-MP-WFRFT signal can enhance 6 dB Signal to Noise Rating(SNR).
作者
张笑宇
范真真
ZHANG Xiaoyu;FAN Zhenzhen(Institute of Military Products,Shandong Special Industry Group Co.Ltd.,Zibo 255200,Shandong,China;Engineering application center of micro flying ammunition,Shandong Special Industry Group Co.Ltd.,Zibo 255200,Shandong,China;Information Engineering Department,Shandong Vocational College of Light Industry,Zibo 255300,Shandong,China;School of Information Science and Engineering,Shenyang Ligong University,Shenyang 110159,Liaoning,China)
出处
《弹箭与制导学报》
北大核心
2025年第5期935-942,共8页
Journal of Projectiles,Rockets,Missiles and Guidance
基金
山东特种工业集团转型升级项目支持资助。
关键词
WFRFT信号
多层多参数
时分调制
低截获
weighted fractional fourier transform signal
multi-layer multi-parameter
time division modulation
low interception
