Modulator performance measurement in wireless sensor transmission chain

In the latest communication system protocols, the Error Vector Magnitude (EVM) become the most significant measurement for evaluating power amplifier performance. It determines the modulator performance and how much error free signal is modulated, represented by the transmit signal phase and amplitude [1]. The main focus of this work is to design a transmission chain for Wireless Sensor Network (WSN) based on the zigbee standard using Matlab/Simulink and to evaluate the modulator performance in terms of reliability and accuracy. We computed Bit Error Rate (BER) and compared the simulation results with theoretical data in order to identify the optimum modulation technique for transmission system while considering the additive white Gaussian noise (AWGN) channel. Moreover, we measured the modulator accuracy of the transmission chain using EVM to quantify the transmitter performance.