Title :
Ranging improvement using Successive Interference Cancellation for multiuser M-WiMAX system
Author :
Kim, JongHun ; Chang, KyungHi
Author_Institution :
Grad. Sch. of IT&T, INHA Univ., Incheon, South Korea
Abstract :
In the uplink of OFDMA (Orthogonal Frequency Division Multiple Access) based M-WiMAX (Mobile-Worldwide Interoperability for Microwave Access) system, linear phase shift is caused by signals transmitted from multiuser with different delay time and thus, MAI (Multiple Access Interference) occurs. MAI degrades the performance of ranging code detection and delay time estimation in the uplink. Therefore, in this paper, we propose a ranging algorithm, applying SIC (Successive Interference Cancellation) to the conventional ranging algorithm, for the MAI minimization and ranging performance improvement. The proposed ranging algorithm is verified through a Monte Carlo simulation, which shows the enhanced performance of ranging code detection and delay time estimation compared to the conventional algorithms.
Keywords :
OFDM modulation; WiMax; frequency division multiple access; interference suppression; radio access networks; Monte Carlo simulation; OFDMA; delay time estimation; mobile-worldwide interoperability for microwave access; multiuser M-WiMAX system; orthogonal frequency division multiple access; ranging code detection; successive interference cancellation; Bandwidth; Base stations; Degradation; Delay effects; Delay estimation; Frequency conversion; Frequency synchronization; Interference cancellation; Multiple access interference; Silicon carbide; M-WiMAX; MAI; OFDMA; SIC; ranging;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5122-7
Electronic_ISBN :
978-1-4244-5123-4
DOI :
10.1109/PIMRC.2009.5450224
