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.
郭连平, 田书林, 王志刚, 罗浚溢. WOLA滤波器组在宽带数字中频处理中的应用[J]. 计量学报, 2013, 34(5): 486-490.
GUO Lian-ping, TIAN Shu-lin, WANG Zhi-gang, LUO Jun-yi . Application of WOLA Filterbanks in Wideband Digital IF Processing. Acta Metrologica Sinica, 2013, 34(5): 486-490.
［1］ Harris F, Dick C, Rice M. Digital receivers and transmitters using Polyphase filter banks for wireless communication ［J］. IEEE Transactions on Microwave Theory and Techniques, 2003, 51(4):1395-1412.
［2］ Crochiere R E, Rabiner L R. Multirate digital signal processing ［M］. Englewod Cliffs: Prentice-Hall Inc, 1983.
［3］ Brennan R, Schneider T. An ultra low-power DSP system with a flexible filterbank ［C］//The Thirty-Fifth Asilomar Conference on Signals, Systems and Computers,Pacific Grove, CA,USA, 2001.
［4］ Brennan R, Schneider T. A flexible filterbank structure for extensive signal manipulations in digital hearing aids ［C］ // Proc of International Symposium on Circuits and Systems, Monterey, CA USA,1998.
［5］ Heller P N. A general formulation of modulated filter banks［J］.IEEE Transactions on Signal Processing, 2004, 47(4): 986-1002.
［6］ 崔杰,肖灵,王玥,等.一种用于数字助听器的WOLA滤波器组的设计准则［J］.应用声学,2010,29(1): 36-42.
［7］ 熊艳平,刘三阳.近似完全重构DFT调制滤波器组的设计［J］.计算机工程与应用, 2008, 44(20): 116-119.
2013, Vol. 34 
