New Preamble Sequence for WiMAX System with Improved Synchronization Accuracy  

作　　者：Suma Sekhar Sakuntala S.Pillai S.Santhosh Kumar 

机构地区：[1]Department of Electronics and Communication Engineering,LBS Institute of Technology for Women,Thiruvananthapuram,Kerala,India [2]Mar Baselios College of Engineering and Technology,Thiruvananthapuram,Kerala,India [3]Department of Electronics and Communication,Govt.Engineering College,Idukki,Kerala,India

出　　处：《Intelligent Automation & Soft Computing》2023年第3期3187-3197,共11页智能自动化与软计算（英文）

摘　　要：Worldwide Interoperability for Microwave Access(WiMAX)trusts Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing(MIMO-OFDM)combination for the deployment of physical layer functions and for connecting the medium access control to the wireless media.Even though Orthogonal Frequency Division Multiplexing(OFDM)facilitates reliable digital broadband transmission in the fading wireless channels,the presence of synchro-nization errors in the form of Carrier Frequency Offset(CFO)and Time Offset(TO)adversely affect the performance of OFDM based physical layers.The objective of this work is to improve the accuracy of the frequency and the time offset estimation in the WiMAX physical layer.A method to enhance the synchro-nization accuracy byfine-tuning the merit factor of the preamble sequence is sug-gested in this paper.Also,a new preamble with improved synchronization accuracy is proposed for the WiMAX system.The performance of the proposed preamble is evaluated in a Rayleigh fading channel and the results of simulations show that the Mean Square Error(MSE)in offset estimation is significantly reduced and it outperforms the standard WiMAX preamble.

关 键 词：WIMAX MIMO OFDM time offset carrier frequency offset preamble sequence integrated sidelobe level merit factor 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]