Abstract
The research on backscatter multiple access schemes has been an interesting topic. Existing schemes in the area of backscatter multiple access are not designed for specific applications, and leave out the contemplation of practical application requirements. In this paper, therefore, we present Ortho-CodeA, a backscatter multiple access scheme that targets indoor Internet of Things (IoT) applications (e.g., the smart home) and considers the practical application requirements. To implement OrthoCodeA, we address several key challenges including imperfect time synchronization, high hardware complexity at receiver, and synchronizing multiple tags information in a low-power manner. We theoretically analyze the feasibility of our scheme and evaluate the performance of Ortho-CodeA through extensive simulations. The results show that Ortho-CodeA supports concurrent transmissions of up to 7 tags and achieves BER of 0 when SNR is greater or equal to 0 dB.
Authors
Weiqi Wu, Ammar Hawbani, and Wei Gong
Publication:
IEEE PerCom (CCF-B)
Keywords
Internet of Things, backscatter multiple access, concurrent transmissions, spread spectrum, orthogonal codes
