Design and Analysis of a Programmable Receiver Front End Based on Baseband Analog-FIR Filtering Using an LPTV Resistor
Design and Analysis of a Programmable Receiver Front End Based on Baseband Analog-FIR Filtering Using an LPTV Resistor
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基于使用 LPTV 电阻的基带模拟 FIR 滤波的可编程接收器前端的设计和分析
DOI：
10.1109/jssc.2018.2804044
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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
本文介绍了一种采用周期性时变部件的可编程接收机前端。使用线性周期时变(LPTV)电阻、无源混频器和积分转储电路，在射频处实现了敏锐的可编程滤波响应。LPTV电阻与积分和转储电路一起实现了可编程的有限脉冲响应(FIR)基带滤波器。然后，使用无源混频器对基带滤波器进行上变频，以在所需的RF中心频率实现锐利的带通滤波。此外，还表明可以对FIR滤波器设计附加<；内联公式>；；tex-ath符号=“LaTeX”>；$S_{11}$<；//内联公式>；约束，以允许阻抗匹配到天线阻抗。所实现的接收器与IIP的17dBm的IIP<SUB>3</SUB>在仅1.2dBm的情况下获得了高度接近的线性度，仅为1.2dBm；内嵌公式&>$\×$\x$\x/内嵌-公式&>频偏，同时实现了与<；内嵌-公式&>；<；的宽带阻抗匹配；$S_{11}$<；/特克斯-数学&>；/内嵌-公式&>>。在0.1千兆赫至1千兆赫的本地振荡器范围内优于−10分贝。
This paper presents a programmable receiver front-end that uses periodically time-varying components. A sharp programmable filtering response was achieved at RF using a linear periodically time-varying (LPTV) resistor in conjunction with a passive mixer and an integrate-and-dump circuit. The LPTV resistor along with the integrate-and-dump circuit is shown to achieve a programmable finite-impulse response (FIR) baseband filter. The baseband filter is then upconverted with the passive mixer to achieve sharp bandpass filtering at the desired RF center frequency. Further, it is shown that an additional <inline-formula> <tex-math notation="LaTeX">$S_{11}$ </tex-math></inline-formula> constraint can be imposed on the FIR filter design to allow for impedance matching to the antenna impedance. The implemented receiver achieved high close-in linearity with >17 dBm of IIP<sub>3</sub> at only 1.2<inline-formula> <tex-math notation="LaTeX">$\times $ </tex-math></inline-formula> bandwidth frequency offset, while achieving a wideband impedance match with <inline-formula> <tex-math notation="LaTeX">$S_{11}$ </tex-math></inline-formula> better than −10 dB throughout the local oscillator range of 0.1–1 GHz.