Design and Implementation of Adaptive Antenna System in a New LTE 3GPP Transceivers Based Multiwavelet Signals

Abstract

The new Long Term Evolution (LTE) transceivers based multiwavelet signals design and implementation are discussed in this paper. LTE is the evolution of the Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the Global System for Mobile Communications (GSM) standard in response to ever‐increasing demands for high quality multimedia services according to users’ expectations; to increase the efficiency of such transceiver successive Adaptive Antenna System (AAS) has been used at receiver to provide an effective reduction of multiuser access interference at an affordable complexity. An AAS has been deployed at the receiver module to reduce the fading effects signal caused by proposed Stanford University Interim (SUI) Channel Models. AAS uses beamforming technique to focus the wireless beam between the base station and the subscriber station. The Least Mean Square (LMS) algorithm is used at the receiver to direct the main beam towards the desired LOS signal and nulls to the multipath signals. It has been demonstrated through MATLAB simulations that the performance of the system is significantly improved by AAS, where beam forming is implemented in the direction of desired user. The results give SNR gain of 1.8dB gained to achieve an error of 10-3 in SUI channels. The performance of the system can be more improved by increasing the number of antennas at receiver.

Keywords

OFDM, DMWT, CDMA, AAS, LMS, Beam forming