Noncoherent Backscatter Communications over Ambient OFDM Signals

This paper is concerned with ambient back-scatter communications over legacy OFDM signals. In recent years, ambient back-scatter communications have gained a lot of interests as a promising enabling technology for Internet-of-Things and green communications. 

In ambient back-scatter communication systems, ultra-low power devices are able to transmit information by back-scattering ambient RF signals generated by legacy communication systems, such as Wi-Fi and cellular networks. 

We corroborate our analysis using Monte- Carlo simulation and investigate the effects of varying the OFDM symbol size, maximum channel delay spread, and the number of receive antennas on the error performance. Proposed technique outperforms other techniques available in the literature for back-scatter communication over ambient OFDM signals in different scenarios.