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| Bandwidth-Matched Digital Receiving Method Based on Variable-Bandwidth EFT Filter |
| Wu Wei Tang Bin |
| (School of Electronic Engineering, UEST of China, Chengdu 610054, China) |
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Abstract This paper proposes a novel bandwidth-matched digital receiving method based on the variable- bandwidth EFT filter. The variable-bandwidth frequency characteristics of the Linear Quasi-Time-Invariant (LQTI) system in Extended Fourier Transform (EFT) frequency domain are used for constructing the Variable-Bandwidth Filter (VBF). By using the variable-bandwidth EFT filter, the Digital DownConversion (DDC) can correctly receive the signals with different bandwidth. Based on a simple updating routine, the proposed variable-bandwidth filter can considerably reduce the complexity during normal operations. It is proposed that the efficient polyphase structure of bandwidth-matched digital downconversion and a significant improvement in efficiency and realizability can be achieved. Finally, the experimental results show the correctness and validity of the method.
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Received: 08 May 2007
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Corresponding Authors:
Wu Wei
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2008, Vol. 30 
