改进的宽带信号有理数倍采样率变换结构  

Rational Sampling Rate Transformation for Wideband Signals

作　　者：邹维[1] 达新宇[1] 谢铁城[1] 王舒[1] 

机构地区：[1]空军工程大学电讯工程学院,西安710077

出　　处：《电讯技术》2012年第11期1783-1786,共4页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(60972042);空军工程大学电讯工程学院研究生论文创新基金资助项目(2011004)~~

摘　　要：针对现有的数字器件无法满足对宽带信号进行有理数倍采样率变换的问题,提出了一种改进的宽带信号有理数倍采样率转换结构。在分析抽取器与内插器顺序的基础上,得出了等效变换的前提条件,并结合多相滤波结构使改进的结构更具有实际应用价值。仿真实验证明了改进后结构的有效性。通过与现有有理数倍采样率变换结构运算量对比分析表明,改进后的结构的运算效率为传统结构运算效率的1/(LM)倍,其中L和M为变换过程中的内插因子和抽取因子。The current digital devices can not work in transformation of rational rates in wideband signal. Based on this problem, an improved transformational structure of rational rates in wideband signal is presented. By analysing order of decimation and interpolation, the precondition of equivalent transformation is obtained. The use of poly phase FIR has brought real applied value in the improved structure. The simulation shows the effectiveness of the improved structure. A comparative analysis of computation of transformational structure of rational rates demonstrates the computation of the improved structure is 1/LM times of the traditional ones, in which L is represents the interpolation factor and M the decimation factor.

关 键 词：数字接收机 宽带信号 有理数倍采样率变换 等效变换 

分 类 号：TN911[电子电信—通信与信息系统]