摘要
针对短突发信号解调的需要,提出了一种基于分散导频块的频偏估计新算法。区别于以往基于连续导频的频偏估计算法,该算法除利用了导频本身已知信息外,还充分利用了导频的位置信息。在相同的帧效率下,相比于基于连续导频的频偏估计算法,该算法可以获得更好的估计性能。理论分析和仿真结果都表明,该算法在其无偏估计范围内估计性能达到了相应帧结构下的克拉美罗界。
For the demodulation requirement of short burst signals, a new algorithm of frequency offset estimation based on dispersive blocks of pilot symbols （DBPS） is proposed. Different from the algorithms of frequency offset estimation based on consecutive pilot symbols （CPS）, the location information of pilot symbols is fully utilized in this algorithm in addition to their own known information. Under the circumstances of equal frame efficiency, a better estimation performance can be achieved by this algorithm compared with those frequency offset estimation algorithms based on CPS. Both theory and simulation results show that the estimation performance of this algorithm can reach the Cramer-Rao bound of the corresponding frame structure within its unbiased estimation range.
出处
《无线电通信技术》
2008年第5期22-24,51,共4页
Radio Communications Technology
关键词
短突发
分散导频块
频偏估计
克拉美罗界
费希尔矩阵
short burst
dispersive blocks of pilot symbols
frequency offset estimation
cramer-Rao bound
fisher matrix
