Performance BER of multi modulation technique In MIMO Rayleigh channel (WCDMA)

  • Marwan Ibrahim Ahmed, Shahir Fleyeh Nawaf
Keywords: WCDMA, MIMO, QPSK, QAM, Rayleigh Channel.

Abstract

WCDMA (Wideband Code Division Multiple Access)  is the extensively used third generation (3G) air interface. Multiple inputs and multiple outputs (MIMO) and higher order modulation (HOM) are new capabilities in Release 7 of wide band code division multiple accesses  that enable better data rates and simultaneous users supported on both the downlink and uplink. These characteristics could help in the improvement of the spectrum productivity, in particular for the distance whose channel conditions are good.  However, we notice a high degrade when the user is in the edge of cell. It also   increases the BER when we increase using (HOM). Therefore, we used two different distances (500m and 2000m). In addition, there is an effect of the Free Space Pathloss (FSPL) on the communication signal, which affects the BER of the system. In addition, we check the effect of the distance and the three types of modulation to the BER to SNR in a multi- modulation (QPSK, 16QAM, 64 QAM) to Rayleigh channel for each one of the modulation by MATLAB 8.4 m-file. As a result, the more appropriate modulation strategy could be used for suiting the Rayleigh channel and distance, allowing us to transmit the best and most efficient data rate to mobile terminals. the result QPSK when the distance 500m show the better performance compared with other m-QAM modulation.

Published
2021-08-17
How to Cite
Shahir Fleyeh Nawaf, M. I. A. (2021). Performance BER of multi modulation technique In MIMO Rayleigh channel (WCDMA). Design Engineering, 9016-9025. Retrieved from http://www.thedesignengineering.com/index.php/DE/article/view/3462
Section
Articles