Noncoherent Frequency Shift Keying for Ambient Backscatter over OFDM Signals

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussavertaisarvioitu


  • Mohamed Elmossallamy
  • Zhu Han
  • Miao Pan
  • Riku Jäntti

  • Karim Seddik
  • Geoffrey Ye Li


  • American University in Cairo
  • Georgia Institute of Technology
  • University of Houston
  • Kyung Hee University


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.


Otsikko2019 IEEE International Conference on Communications, ICC 2019 - Proceedings
TilaJulkaistu - 1 toukokuuta 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaIEEE International Conference on Communications - Shanghai, Kiina
Kesto: 20 toukokuuta 201924 toukokuuta 2019


NimiIEEE International Conference on Communications
ISSN (painettu)1550-3607
ISSN (elektroninen)1938-1883


ConferenceIEEE International Conference on Communications

ID: 38735092