We demonstrate for the first time that a multicarrier signal, and in particular an OFDM signal, can be generated by backscattering a single carrier incoming electromagnetic wave. This is achieved by utilizing a semi-passive IQ backscatter modulator involving two transistors with varying biasing in a Wilkinson power divider architecture that has previously been proposed and demonstrated for Quadrature Amplitude Modulation (QAM) and Chirp Spread Spectrum (CSS) modulation schemes. The multicarrier backscattering signal is synthesized in time domain. This capability enables low-cost and low-power consumption tags to significantly improve the transmission data rate and potentially communicate with the commercial wireless networks such as WiFi and LTE.
|Number of pages||3|
|Publication status||Accepted/In press - 25 Mar 2020|
|Event||IEEE MTT-S International Wireless Symposium 2020 - Shanghai, China|
Duration: 20 Sep 2020 → 23 Sep 2020
|Conference||IEEE MTT-S International Wireless Symposium 2020|
|Abbreviated title||IWS 2020|
|Period||20/09/20 → 23/09/20|
Ding, Y., Goussetis, G., Correia, R., Lihakanga, R., Borges Carvalho, N., & Petridis, P. (Accepted/In press). Enabling Multicarrier Backscattering Communications. Paper presented at IEEE MTT-S International Wireless Symposium 2020, Shanghai, China.