Open AccessBit Error Rate (BER) Performance of MIMO Systems in M QAM with Nonlinear Effect
Author(s) -
Ahmed E. Zakzouk,
Ragab M. Elbakar,
Mohamed I. Yousef
Publication year - 2019
Publication title -
international journal of engineering and advanced technology
Language(s) - English
Resource type - Journals
ISSN - 2249-8958
DOI - 10.35940/ijeat.b2642.129219
Subject(s) - qam , bit error rate , quadrature amplitude modulation , transmitter , space–time block code , mimo , block code , transmit diversity , electronic engineering , computer science , amplifier , nonlinear system , diversity gain , antenna diversity , telecommunications , beamforming , fading , physics , engineering , bandwidth (computing) , antenna (radio) , decoding methods , channel (broadcasting) , quantum mechanics
Out object in this paper it to study, the effect of nonlinearity on the bit error rate (BER) of MIMO systems in M-QAM modulation techniques. We consider Saleh’s model (power amplifier model) for the nonlinearity, and apply the nonlinear model on MIMO system with receiver diversity and transmitter diversity. For transmitter diversity, the Space-Time Block Coding (STBC) based on Alamouti scheme is used to provide transmits diversity for two transmitting antennas. The results show that, if there is a high variation in the amplitude of the M- QAM symbols, there will behigh effect of nonlinearity that causes high BER especially for high amplitude symbols at high SNR.