Design and Analysis of a Programmable Receiver Front End With Time-Interleaved Baseband Analog-FIR Filtering
Design and Analysis of a Programmable Receiver Front End With Time-Interleaved Baseband Analog-FIR Filtering
复制标题
具有时间交错基带模拟 FIR 滤波的可编程接收器前端的设计和分析
DOI：
10.1109/jssc.2018.2862892
复制
发表时间：
2018
影响因子：
5.4
通讯作者：
S. Pamarti
中科院分区：
文献类型：
--
作者：
Sameed Hameed;S. Pamarti
本文提出了时间交织作为一种方法，以提高性能的可编程接收机前端的滤波混叠的基础上。采用两条平行的周期时变路径，在射频端产生了尖锐的可编程滤波响应，同时获得了良好的<inline-formula><tex-math notation="LaTeX">宽带S11</tex-math></inline-formula>。实现的接收机实现了70 dB的滤波器阻带抑制，过渡带仅为4<inline-formula><tex-math notation="LaTeX">$\times$</tex-math></inline-formula> RF带宽，而<inline-formula><tex-math notation="LaTeX">$S_{11}$</tex-math></inline-formula>在大部分接收机本振范围内优于-10 dB。文中给出了实现<inline-formula><tex-math notation="LaTeX">的S_{11}$</tex-math></inline-formula>和噪声系数的分析，同时详细介绍了在存在重要电路寄生效应的情况下提高滤波性能的方法。时间交织路径之间的失配的影响也进行了分析和量化。
This paper presents time interleaving as an approach to improve the performance of programmable receiver front ends based on filtering-by-aliasing. Using two parallel periodically time-varying paths, a sharp programmable filtering response is produced at RF, while achieving a good wideband <inline-formula> <tex-math notation="LaTeX">$S_{11}$ </tex-math></inline-formula>. The implemented receiver achieved a filter stopband suppression of 70 dB with a transition band of only 4<inline-formula> <tex-math notation="LaTeX">$\times$ </tex-math></inline-formula> RF bandwidth, while <inline-formula> <tex-math notation="LaTeX">$S_{11}$ </tex-math></inline-formula> is better than −10 dB throughout most of the receiver local oscillator range. Analysis for achieved <inline-formula> <tex-math notation="LaTeX">$S_{11}$ </tex-math></inline-formula> and noise figure are shown, while detailing methods to improve filtering performance in the presence of important circuit parasitics. The effects of mismatches between time-interleaved paths are also analyzed and quantified.