文章基本信息

标题：A Modulated Hybrid Filter Bank for Wide-Band Analog-to-Digital Converters
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作者：Yuan, Chunyan ; Wang, Wei ; Zhang, Zi-Jing 等
期刊名称：Journal of Multimedia
印刷版ISSN：1796-2048
出版年度：2014
卷号：9
期号：4
页码：569-575
DOI：10.4304/jmm.9.4.569-575
语种：English
出版社：Academy Publisher
摘要：It is difficult to use a single analog-to-digital conversion (ADC) to satisfy the requirements for conversion of an ultra-wideband signal. A parallel architecture for high bandwidth ADC, named cosine modulated hybrid filter bank, is presented to address this problem. First, the proposed architecture shifts the input signal spectrum by means of mixers. The modulated signal is channelized into smaller frequency subband signals using identical lowpass analog filters. Then the subband signals are digitized through identical narrowband ADCs, respectively. Finally, the digitized signals are up-sampled, then filtered and combined to reconstruct the digital representation of the original wide-band input signal. The digital filters are designed to use the eigenfilter method based on total least squares error criterion. Since the sample-and-hold circuits needed are only identical narrowband baseband circuits, the simplicity of the system makes the design easier and cheaper. Several design examples are used to illustrate the performance of the proposed system.
关键词：Analog-To-Digital Conversion;Parallel Hybrid Filter Bank;Cosine;Reconstruction