WE2.L1.3

SYMBOL PAIR MODULATION FOR PHASE-CANCELLATION ROBUST TAG-TO-TAG COMMUNICATIONS

R.J. de Jong, A.B.J. Kokkeler, University of Twente, Netherlands

Session:
WE2.L1: RFID-based sensors and wireless communication Oral

Track:
RFID sensors

Location:
Room 1

Presentation Time:
Wed, 6 Sep, 12:20 - 12:40 Portugal Time

Abstract
Backscatter communication has gained large interest because of its low cost to perform passive wireless transmission and reception. However, phase cancellation can cause communication between 2 tags to fail. Existing solutions scale poorly in hardware size or throughput, as they utilize multiple antennas or a handshake procedure between tags, respectively. This paper introduces Symbol Pair Modulation (SPM) which is robust against phase cancellation by using IQ modulation over the (passive) non-coherent hardware. We will show by analytical expressions and simulations that SPM with DBPSK does not suffer from phase cancellation, and only requires 0.6dB greater Eb/N0 ratio to achieve BER = 10E-3 compared to BPSK with FM0 line encoding.
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