In the Wi-Fi backscatter communication system using temporal combining to enhance communication reliability, we identify an uneven bit reliability problem within a tag packet due to airtime-varying Wi-Fi carrier signals. To address this problem, we propose a position-wise repetition coding framework that assigns different repetition codes to bits based on their positions within a tag packet. We develop three adaptation algorithms to determine the appropriate repetition code for bit blocks according to current channel conditions. Prototyping the framework and algorithms, our testbed experiments with commodity Wi-Fi receivers demonstrate the framework’s effectiveness and the throughput gains achieved by the algorithms.

中文翻译：

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用于广播时间变化载波信号的 Wi-Fi 反向散射通信


在使用时间组合来提高通信可靠性的 Wi-Fi 反向散射通信系统中，我们识别了由于广播时间变化的 Wi-Fi 载波信号而导致的标签数据包中的不均匀比特可靠性问题。为了解决这个问题，我们提出了一个位置重复编码框架，该框架根据它们在标签数据包中的位置为位分配不同的重复代码。我们开发了三种自适应算法，以根据当前通道条件确定 bit 块的适当重复代码。通过对框架和算法进行原型设计，我们使用商用 Wi-Fi 接收器进行了测试台实验，证明了框架的有效性和算法实现的吞吐量增益。