WOLA滤波器组在宽带数字中频处理中的应用

郭连平; 田书林; 王志刚; 罗浚溢

doi:10.3969/j.issn.1000-1158.2013.05.18

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计量学报 ›› 2013, Vol. 34 ›› Issue (5) : 486-490. DOI: 10.3969/j.issn.1000-1158.2013.05.18

WOLA滤波器组在宽带数字中频处理中的应用

郭连平, 田书林, 王志刚, 罗浚溢

作者信息 +

Application of WOLA Filterbanks in Wideband Digital IF Processing

GUO Lian-ping, TIAN Shu-lin, WANG Zhi-gang, LUO Jun-yi

Author information +

文章历史 +

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。

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.

导出引用

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 https://doi.org/10.3969/j.issn.1000-1158.2013.05.18

GUO Lian-ping, TIAN Shu-lin, WANG Zhi-gang, LUO Jun-yi. Application of WOLA Filterbanks in Wideband Digital IF Processing[J]. Acta Metrologica Sinica. 2013, 34(5): 486-490 https://doi.org/10.3969/j.issn.1000-1158.2013.05.18

参考文献

［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.