NDLI: Wideband digital Quadrature Transformation based on perfect reconstruction filter banks

Content Provider	IEEE Xplore Digital Library
Author	Xiaohong Huang Zhenmiao Deng
Copyright Year	2011
Description	Author affiliation: School of information science and technology, Xiamen University, Fujian, China 361005 (Zhenmiao Deng) \|\| College of information, Hebei Polytechnic University, Tangshan, China 063009 (Xiaohong Huang)
Abstract	Quadrature Transformation based on Hilbert transform method to wideband signal is not suited to engineering application because the group delay can make severe aliasing. Wideband digital quadrature transformation based on perfect reconstruction filter banks is put forward in this paper. The wideband signal is divided into sub-band signals by analysis filter bank, then let the negative parts of the output sub-band signals equal to zero, then compose the processed signal by synthesis filter banks, the synthesis signal is the complex signal after quadrature transformation. Filter polyphase structure is used in this method, which can be realized by FFT algorithm. Algorithm of FFT and IFFT are used only one time in this new method which can reduce more computational workload, and it has the advantages of better image-reject, being realized easily in FPGA. The simulation result of Matlab shows that the error between the complex signals after quadrature transformation based on the traditional method and this paper's method is up to −150dB, the error is small.
Starting Page	1898
Ending Page	1901
File Size	206505
Page Count	4
File Format	PDF
ISBN	9781424480364
e-ISBN	9781424480395
DOI	10.1109/ICEICE.2011.5777833
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Algorithm design and analysis Low pass filters Polyphase FFT Quadrature transformation Filter banks Perfect reconstruction filter bank Filtering theory Wideband Image reconstruction
Content Type	Text
Resource Type	Article

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