多分量多项式相位信号瞬时频率变化率的估计  

Estimation of Instantaneous Frequency Rate for Multicomponent Polynominal Phase signals

作　　者：刘庆云[1] 张汗灵[2] 梁红[3] 

机构地区：[1]第二炮兵工程学院,陕西西安710025 [2]湖南大学计算机与通信学院,湖南长沙410082 [3]西北工业大学航海学院,陕西西安710072

出　　处：《电子学报》2005年第10期1890-1892,共3页Acta Electronica Sinica

摘　　要：引入了一个二维双线性相位匹配变换.对相位阶次不大于5的多分量多项式相位信号(mc-PPS)而言,各信号分量的瞬时频率变化率(IFR)在变换结果中表现为局部极值点,而交叉项则很少表现为极值点.又由于各信号分量IFR随时间变化表现出连续性,而由交叉项所产生的各极值点无此特征,因此,该变换可用于实现mc-PPS中各信号分量IFR的估计.对估计性能进行了理论分析,并同仿真结果进行了比较.It introduces a two-dimensional matched-phase transform. For multicomponent polynominal phase signals （mc-PPS） whose phase order is beyond five, their instantaneous frequency rate （IFR） will be local maxima in the transform. However their crossterms seldom emerge as local maxima. IFR of signal component is continuous function of time, but local maxima produced by crossterms have not this property. So one can realize the estimation of IFR of each component at all time instant by this transform. Accuracy is theoretically analyzed and compared with simulation result.

关 键 词：多项式相位信号 瞬时频率变化率 参数估计 相位匹配变换 

分 类 号：TN911.72[电子电信—通信与信息系统]