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| Dynamic Channelization Based on Nonuniform Filterbanks |
| Li Bing①②; Zheng Jin③; Ge Lin-dong① |
| ①Institute of Information Engineering, Information Engineering University, Zhengzhou 450002,China; ②Spectrum Management Center of PLA General Staff Headquarters, Beijing 100078,China;③Space Information Countermeasure Center of the 54th Research Institute of PLA General Staff Headquarters, Beijing 100083,China |
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Abstract Based on the fact that there exist several subband signals in the received bandwidth, whose number, band location and bandwidth are time-variant, this paper presents an efficient method of dynamic channelization based on nonuniform filterbanks. The number of subchannels of the uniform filterbank is firstly determined by the given minimal guard bandwidth, and then a corresponding cosine-based filterbank is designed. A nonuniform matrix is derived in terms of band location of every subband signal, and then a nonuniform filterbank can be constructed through directly merging the adjacent subchannels of the uniform filterbank according to the nonuniform matrix. When subband signals dynamically change, channelization can be implemented as long as updating the nonuniform matrix in terms of band location of new subband signal. The computational complexity of implementation architecture can be reduced by the use of relationships between decimation factors of different subband signals. Computer simulations illustrate new method validity.
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Received: 10 April 2006
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2007, Vol. 29 
