在研究TDDM-BOC调制信号产生机理的基础上,对TDDM-BOC调制信号的特性进行了分析.依据TDDM-BOC调制序列自相关函数与信号参数之间的关系,提出一种TDDM-BOC调制信号参数估计方法,实现了对信号载波频率、扩频码速率和方波副载波速率的有效估计,并对算法性能进行了仿真.仿真结果表明算法可在信噪比高于-14 dB条件下实现有效估计.
Based on studying the generating principle of TDDM-BOC(time division data modulation-binary offset carrier) modulation signal,the characteristics of TDDM-BOC modulation signal are analyzed.According to the relationship between auto-correlation function and parameters of signal,a method is proposed to estimate the parameters of the TDDM-BOC signal.The frequencies of the carrier wave,spread-spectrum code and square subcarrier are estimated effectively,and the method performance is simulated.The simulation results show that the method can work well at SNR -14 dB.