Enhanced front-end to extend reading range of commercial RFID readers using efficient multisine signals

In this paper, multisine excitation signals are used to extend the reading range of commercial RFID readers. To do so, a commercial reader is equipped with an external multisine front-end that implements previous mathematical proposals. A reading range improvement is achieved when compared with conventional single carrier approaches, even with the same average power being transmitted. A reading range improvement of near 43% is obtained for a 8-tones multisine signal with 2MHz tone separation.