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To transmit data and Radio frequency Identification System (RFID) information from one location to another without physically connecting them together, as in wireless mobility, it is important to choose a suitable modulation scheme. This work presents the design and simulation of RFID using different modulating schemes. Some modulating schemes have been considered which are M-Ary PSK and M-Ary QAM. The study involves using Simulink in MATLAB to design the RFID using the stated modulating schemes as modulating technique. The modulated signals were then passed through additive white Gaussian noise and Rayleigh multipath fading channels to model the transmission of the signals through wireless medium. Each design is optimized to obtain the best design. The various simulations are compared using three figures of merit: Bit Error Rate(BER), Power Efficiency, and Bandwidth efficiency, to determine the best modulating scheme in the design of Radio frequency identification (RFID) system. The result established that QAM has a better performance metrics.

Performance Evaluation of some Modulation Techniques for Radio Frequency Identification (RFID) System under different communication channels