An RF Based Analog Linear Demodulator
An RF Based Analog Linear Demodulator
复制标题
基于射频的模拟线性解调器
DOI：
--
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发表时间：
2011
影响因子：
3
通讯作者：
O. Boric
中科院分区：
文献类型：
--
作者：
I. Mostafanezhad;O. Boric
正交零差接收器已广泛用于无线生命体征监测应用。在这封信中，提出了一种新的单混频器接收器架构，该架构使用相位调谐方法来达到最佳解调点，并消除与零差接收器相关的直流偏移。该方法显着简化了接收器架构，并消除了处理基带数据的解调步骤。使用该系统获得的实验结果表明，获得的生理信号没有失真，并且对于静止受试者的估计心率准确度为 99%。
Quadrature homodyne receivers have been used extensively for wireless life sign monitoring applications. In this letter, a new single mixer receiver architecture is proposed, that uses a phase tuning method to reach optimum demodulation point, and remove the dc offset associated with homodyne receivers. This method significantly simplifies the receiver architecture, and eliminates the demodulation step of processing baseband data. Experimental results obtained with this system demonstrate that physiological signals have been obtained without distortion, and with estimated heart rate accuracy of 99% for a stationary subject.