A multi-reader joint detection scheme for dense RFID networks

This paper proposes a novel multi-reader joint detection scheme for dense RFID systems. The Interleave Division Multiple Access (IDMA) is adopted for multi-tag access control. The transmitters and receivers of IDMA are adapted to the RFID backscattering channel model. With the help of IDMA, signals from multiple tags can be resolved simultaneously, allowing joint detection among adjacent readers. Fundamental channel multiplexing can thus be achieved from the extra diversity. Through computer simulations it is showed the proposed scheme can achieve better detection bit error rate and channel capacity than non-IDMA assisted systems in overlapped region. Some simplification issues of the proposed scheme are discussed as well.