Adaptive interference rejection in Human Body Communication using variable duty cycle integrating DDR receiver
Adaptive interference rejection in Human Body Communication using variable duty cycle integrating DDR receiver
复制标题
使用可变占空比集成 DDR 接收器的人体通信中的自适应干扰抑制
DOI：
10.23919/date.2017.7927278
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Shreyas Sen
中科院分区：
文献类型：
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作者：
Shovan Maity;D. Das;Shreyas Sen
随着廉价、小型化、超低功耗计算和通信的出现，连接的智能可穿戴设备变得越来越受欢迎。人体通信（HBC）正在成为无线体域网（WBAN）的替代方案，用于这些设备之间的通信，因为它提供了更高的能效和安全性。HBC的最大瓶颈之一是由于人体天线效应而产生的干扰，信号干扰比通常低于-20dB。介绍了一种抗干扰的积分双数据速率（DDR）接收机，通过对积分时钟进行脉宽调制，动态地改变积分时钟的占空比，使其能够适应不断变化的干扰条件，提供高的干扰抑制能力。接收机的理论、架构与自适应算法一起沿着发展，以训练接收机找到最佳工作占空比。系统级仿真显示，即使在存在可变干扰频率的情况下，抑制效果也大于20 dB。
Connected smart wearable devices are becoming increasingly popular with the advent of cheap, miniaturized, ultra-low-power computing and communication. Human Body Communication (HBC) is emerging as an alternative to Wireless Body Area Network (WBAN) for communication among these devices, as it provides higher energy-efficiency and security. One of the biggest bottleneck of HBC is the interference picked up due to the human body antenna effect, with Signal to Interference Ratio often worse than −20dB. An interference robust integrating dual data rate (DDR) receiver is introduced which can adapt itself to changing interference conditions and provide high interference rejection by Pulse Width Modulation of integration clock, thus dynamically changing its duty cycle. The theory, architecture of the receiver is developed along with the adaptation algorithm to train the receiver to find the optimum duty cycle of operation. System-level simulations show >20 dB of rejection even in presence of variable interference frequencies.