PhyCode: A Practical Wireless Communication System Exploiting Superimposed Signals
Abstract
Superimposed signals are anticipated to improve wireless spectrum efficiency to support the ever-growing IoT applications. Implementing the superimposed signal demands on ideally aligned signals in both the time and frequency domains. Prior work applied an average carrier-frequency offset compensation to the superimposed signal under the assumptions of homogeneous devices and static environments. However, this will cause a significant signal distortion in practice when heterogeneous IoT devices are involved in a dynamic environment. This paper presents PhyCode, which exploits the nature of varying offsets across devices, and designs a dynamic decoding scheme which can react to the exact offsets from different signal sources simultaneously. We implement PhyCode via a software-defined radio platform and demonstrate that PhyCode achieves a lower raw BER compared with the existing state-of-the-art method.
Keywords
Cite
@article{arxiv.1907.11654,
title = {PhyCode: A Practical Wireless Communication System Exploiting Superimposed Signals},
author = {Wen Cui and Chen Liu and Lin Cai and Jianping Pan},
journal= {arXiv preprint arXiv:1907.11654},
year = {2019}
}