【摘要】 针对现有的正弦调频(SFM)信号参数估计算法运算量大、受调频系数范围限制等缺点,提出了一种利用卡森准则的SFM信号参数估计算法。首先分析信号及其瞬时频率的频谱特征,推导了信号载频和调制频率的估计表达式;然后通过带宽测量,依据卡森准则提取了信号的调制指数。该算法不受调制指数取值的制约,且运算量仅为相同条件下WVD分布的1%。仿真表明,当SNR≥6dB时,参数均方根误差小于?10dB。更多还原

【Abstract】 A new approach for Sinusoidal FM(SFM) signal based on Carson Rule is presented.This approach can lower the computational complexity and eliminate the effect of FM coefficient.First,by analyzing the spectrum traits of SFM signal and its instantaneous frequency,the estimation for carrier frequency and modulated frequency are given.Moreover,the FM coefficient is expressed by modulated frequency and bandwidth based on Carson Rule.This algo-rithm is suitable for weakly modulated signals as well as highly modulated signals,and the computation is just 1% of the one of WVD under the same conditions.The simulation results showed when SNR≥6 dB,the RMSE <?10 dB.更多还原