取邻抽取任意倍数采样率变换算法  

Conversion Algorithm Between Arbitrary Sampling Rate Based on Neighbor Decimation

作　　者：李天昀[1] 许漫坤[1] 葛临东[1] 

机构地区：[1]解放军信息工程大学信息工程学院,郑州450002

出　　处：《数据采集与处理》2012年第2期254-258,共5页Journal of Data Acquisition and Processing

摘　　要：定量分析了取邻抽取任意倍数采样率变换算法的取邻误差。首先基于分数倍采样率变换结构,从取邻抽取的角度阐述了软件无线电中的任意倍数采样率变换算法,推导了其实现结构和计算量。在此基础上,详细地定量分析了取邻误差,将取邻抽取的影响等价为信噪比的降低,并以此为指导选取算法参数。结果表明,这种取邻抽取任意倍数采样率变换算法具有通用性和高效性的优势,通用性表现为以统一的算法结构来实现任意倍数的采样率变换,高效性表现为在同样性能要求下其计算量与传统方法相当。A novel approach is presented to quantitatively analyze the error caused by neighbor decimation in the conversion between arbitrary sampling rates. Based on a fractional sampling rate conversion structure, an arbitrary sampling rate conversion algorithm for software radio based on neighbor decimation is proposed. The computational complexity of the structure is deduced. Furthermore, the error of neighbor decimation is quantitatively analyzed in detail. Treated as a kind of signal-to-noise ratio （SNR） reduction, the effects of neighbor decimation can be the guideline of parameter selection. Results prove that the method is superiory to other methods both in currency and efficiency. The currency behaves as a uniform structure to realize all arbitrary sampling rate conversion. And the high efficiency behaves as the equivalent computation complexity to traditional methods with the same performance.

关 键 词：软件无线电 任意倍数采样率变换 取邻抽取 

分 类 号：TN911.7[电子电信—通信与信息系统]