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基于可变带宽EFT滤波器的带宽匹配数字接收方法 被引量：1

Bandwidth-Matched Digital Receiving Method Based on Variable-Bandwidth EFT Filter
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摘要 该文提出了一种新的基于可变带宽EFT滤波器的带宽匹配数字接收方法。文中利用线性准时不变(LQTI)系统在扩展傅里叶变换(EFT)域的可变带宽频率特性来构建可变带宽滤波器(VBF),并将可变带宽EFT滤波器引入数字下变频(DDC),实现对不同带宽信号的匹配接收。应用这种滤波器的优点在于只有一个直接决定带宽的可调谱参数,更新机制简单。文中还进一步给出带宽匹配接收数字下变频的多相高效结构,运算效率和工程可实现性大大提高。实验结果证明了该方法的正确性和有效性。 This paper proposes a novel bandwidth-matched digital receiving method based on the variablebandwidth 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.
作者 吴伟 唐斌
机构地区 电子科技大学电子工程学院
出处 《电子与信息学报》 EI CSCD 北大核心 2008年第11期2728-2731,共4页 Journal of Electronics & Information Technology
基金 国家部级基金资助课题
关键词 扩展傅里叶变换 线性准时不变系统 可变带宽滤波器 带宽匹配接收 多相结构 Extended Fourier Transform （EFT） Linear Quasi-Time-Invariant （LQTI） system Variable-Bandwidth Filter （VBF） Bandwidth-matched digital receiving Polyphase structure
分类号 TN957 [电子电信—信号与信息处理] TN911.72 [电子电信—通信与信息系统]
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参考文献11

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电子与信息学报
2008年 第11期

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