【摘要】 信道化技术是一种宽带数字中频系统中常用于信号处理与分析的技术。多相DFT滤波器组是实现信道化的一种高效结构,但其参数设计的灵活性受到了信道数目与抽取倍数必须相等的限制。利用WOLA滤波器组实现宽带数字中频的信道化设计,可实现与多相DFT滤波器组相同的功能,同时解除了信道数目与抽取倍数的约束关系。仿真结果验证了WOLA滤波器组实现宽带信号信道化的有效性。更多还原

【Abstract】 The channelized technology is applied to the process and analysis of wideband signals in the digital intermediate frequency(IF) processing module.Polyphase discrete Fourier transform(PDFT) filterbank is an efficient structure for channelized design,but its flexibility is limited by the fixed relationship between decimating factor and channel number.Weighted overlap-add(WOLA) filterbanks is adopted to realized the channelized design in digital IF module.The WOLA structure gets rid of the fixed relationship in PDFT structure and realizes the same functions.The simulation results show the effectiveness of the WOLA structure.更多还原