摘要
介绍了几种常用的符号率盲估计方法,简单回顾了基于循环相关符号率盲估计的基本算法,在此基础上,通过理论分析提出一种基于循环相关符号率盲估计的快速实现方法。该方法利用FFT运算代替循环频率遍历搜索,计算量分析表明,与基本算法相比,快速算法大幅度降低了计算量,仿真结果验证了该算法的有效性。最后,对算法中存在的问题进行了分析并给出了解决方法。
Some methods of symbol rate blind estimation are introduced.And the basic method based on the cyclic correlation is briefly reviewed.A fast realization method of symbol rate blind estimation based on the cyclic correlation is proposed through theoretic analysis.The method adopts FFT instead of the cyclic frequency scanning.The analysis of the calculation amount shows that the new method is faster than the basic one.Simulation results validate the method.Finally,the defects of the method are analyzed and the solutions are introduced.
出处
《信息与电子工程》
2011年第1期60-63,共4页
information and electronic engineering
基金
中国工程物理研究院科学技术发展基金资助项目(2009B0403043)
关键词
循环相关
符号率
盲估计
cyclic correlation
symbol rate
blind estimation
