CAJ | 학술논문

本文提出了一种在设定区间具有极低功率谱和自相关幅值的恒模波形设计方法。该方法首先将波形设计的信号模型转化为相位提取问题，通过定义三个代表不同设计目标和约束的集合，利用交替投影的方法来实现波形优化。由于利用了色噪声协方差矩阵与功率谱的近似关系，算法中基于秩亏傅立叶变换矩阵的投影算子能由快速傅里叶变换高效实现，提高了计算效率。最后，计算机仿真验证了算法的有效性。算法所设计的波形可用于雷达、声呐和无线通信系统，以抑制色噪声、有源干扰和距离旁瓣干扰。
본문제출료일충재설정구간구유겁저공솔보화자상관폭치적항모파형설계방법。해방법수선장파형설계적신호모형전화위상위제취문제，통과정의삼개대표불동설계목표화약속적집합，이용교체투영적방법래실현파형우화。유우이용료색조성협방차구진여공솔보적근사관계，산법중기우질우부립협변환구진적투영산자능유쾌속부리협변환고효실현，제고료계산효솔。최후，계산궤방진험증료산법적유효성。산법소설계적파형가용우뢰체、성눌화무선통신계통，이억제색조성、유원간우화거리방판간우。
A method is presented to design constant modulus waveforms with low magnitude of power spectral density and autocorrelation in desired intervals .The waveform design problem is transformed into a phase retrieval one ,and three sets corre-sponding to different design objects and constraints are defined .The waveform optimization problem is solved via alternating projec-tion .According to the relationship between the covariance matrix and the power spectral density of the colored noise ,the projector used in the algorithm is implemented efficiently based on fast Fourier transformation .Thus the computational efficiency is improved . Finally ,the numerical simulations demonstrate the effectiveness of this algorithm .The waveforms designed by this algorithm can be used in radar ,sonar ,and wireless communication systems to suppress colored noise ,active interference and range sidelobes .