@inproceedings{a7ca631bb6f5419797089648131a93a8,
title = "Noncoherent Frequency Shift Keying for Ambient Backscatter over OFDM Signals",
abstract = "In this paper, we investigate binary frequency shift keying (BFSK) over ambient OFDM signals. By cycling through a sequence of antenna loads providing different phase shifts at the tag, we are able to unidirectionally shift the ambient spectrum either up or down in frequency allowing the implementation of BFSK. We exploit the guard band and the orthogonality of the OFDM subcarriers to avoid both direct-link and adjacent channel interference. Different from energy detection based techniques which suffer from asymmetric error probabilities, the proposed scheme has symmetric error probabilities. Furthermore, we analyze the error performance of the optimal noncoherent detector and obtain an exact expression for the average probability of error. Finally, simulation results corroborate our analysis and show that the proposed scheme outperforms energy detection based schemes available in the literature by up to 3 dB.",
keywords = "Ambient backscatter, green communications, internet of things, OFDM, performance analysis",
author = "Mohamed Elmossallamy and Zhu Han and Miao Pan and Riku J{\"a}ntti and Karim Seddik and Li, {Geoffrey Ye}",
year = "2019",
month = may,
day = "1",
doi = "10.1109/ICC.2019.8762048",
language = "English",
series = "IEEE International Conference on Communications",
publisher = "IEEE",
booktitle = "2019 IEEE International Conference on Communications, ICC 2019 - Proceedings",
address = "United States",
note = "IEEE International Conference on Communications, ICC ; Conference date: 20-05-2019 Through 24-05-2019",
}