CAJ | 학술논문

现代通信为了实现抗干扰普遍用到复合调制信号,目前的大多数信号参数估计方法采用先验信息部分已知的假设,具有特殊性.本文设计了一种低信噪比信元的码元宽度、带宽、伪码数等参数的估计方法,对信号进行短时傅里叶变换,再对输出信号进行三阶累积量短时估计,利用信号时频图的Radon变换实现参数估计.仿真表明该方法无需先验知识,并具有通用性的优点.
현대통신위료실현항간우보편용도복합조제신호,목전적대다수신호삼수고계방법채용선험신식부분이지적가설,구유특수성.본문설계료일충저신조비신원적마원관도、대관、위마수등삼수적고계방법,대신호진행단시부리협변환,재대수출신호진행삼계루적량단시고계,이용신호시빈도적Radon변환실현삼수고계.방진표명해방법무수선험지식,병구유통용성적우점.
@@@@Modern communication commonly used complex modulation signal in order to achieve anti-jamming. Methods using a priori information partially known hypothesis parameter estimation of most signal current. This paper describes the design of a low signal to noise ratio method for parameter estimation of code width, cell bandwidth, PN code number, the short-time Fu Liye trans-form of the signal, the output signal by three order cumulant short-time estimation, using the signal Radon conversion plans to achieve the parameter estimation. The simulation results show that the method without prior knowledge, and has the advantages of universal.