现实误差下混合滤波器组性能改进  

Improving of the Performance of Hybrid Filter Banks A/D Converters to Realization Errors

作　　者：杨玥[1] 刘素娟[1] 陈建新[1] 

机构地区：[1]北京工业大学电子信息与控制工程学院,北京100124

出　　处：《北京工业大学学报》2009年第12期1597-1602,共6页Journal of Beijing University of Technology

基　　金：信息产业部<网络多媒体SOC芯片研制及产业化>信基办[2005]003

摘　　要：将模拟器件偏差、增益偏差、偏置偏差、量化噪声等现实误差引入到混合滤波器组ADC系统中.导致整个系统的性能与理想情况下相比有较大幅下降.为了解决上述问题,采用中心频带法进行改进.理论计算和系统仿真表明,该方法能有效地抑制系统性能的下降,可以降低混叠误差50 dB以上,降低失真误差2个数量级,提升系统信噪比40 dB.The realization errors such as analog imperfections,gain errors,offset errors and quantization noises are introduced into the hybrid filter banks(HFB) ADC system.It is shown that no matter what kind of errors it is,it has a dramatic influence on the performance of the HFB.Therefore,a method called Central Frequency is presented to improve the performance.The validity is proved by theoretic calculation and behavior simulation.The HFB system s aliasing errors decrease above 50 dB,the distortion errors decreas...

关 键 词：混合滤波器组 分解滤波器组 综合滤波器组 模拟偏差 中心频带法 

分 类 号：TN713[电子电信—电路与系统]