摘要
在恒模PCMA(paired carrier multiple access)信号识别、参数估计中,一般采用谱估计或高阶谱估计方法。由于恒模PCMA信号波形的幅度变化是成形函数引起的,包络起伏小、特征不显著,但不需要符号速率、定时等先验知识。以PCMA信号码元变化点导数不连续为出发点,基于极端信息理念,提出了PCMA信号码元周期码元起始点差分估值新方法。理论和仿真证明:该方法具有抗噪性能好、运算速度快、估值精度高、码元延时不敏感和需先验信息少等特点。
It is very difficult to estimate symbol period in PCMA （paired carrier multiple access） signals with sampled data. In the paper, a new method is proposed for estimating symbol period of PCMA signals based on extra information. At first, the model of PCMA signals is introduced. Then, the extra information of PCMA signals is defined and the symbol period estimating is given. The a- nalysis shows that the proposed method is simple, effective and accurate.
出处
《信息工程大学学报》
2013年第3期353-358,共6页
Journal of Information Engineering University
