Maximize Saving Transmitted Power in Wireless Communication System Using Adaptive Modulation Technique

摘要

This paper contributes reduces the transmitted power in wireless communication using of adaptive modulation technique. The system has the ability to select the modulation scheme by which the transmitted power will be minimized at a fixed probability of error. The selection of modulation scheme made according to the current signal to noise ratio (SNR) of the Additive White Gaussian Noise AWGN channel. The modulation schemes implemented in this system are BPSK, QPSK, 8QAM, 16QAM, 32QAM and 64QAM. The channel is divided into four regions according to the required SNR on channel for each scheme. Hence, the modulation scheme that maximized the saved power (minimized the transmitted power) is applied. The total saved power by adaptive modulation equal to the sum of all saved power at a fixed probability of error. Along with different values of symbol error rate, the total saved power percentage is approximately between (30% to 45%).