Channel Equalization of OFDMA System Using RLS Algorithm

• Main Authors: Chun-Fa Wu, 吳春發
• Other Authors: 魏存毅
• Format: Others
• Language: en_US
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/95205140107727501599

碩士 === 國立臺北大學 === 通訊工程研究所 === 99 === In supporting the multi-user communications, OFDMA has been utilized to construct the download LTE system. In this paper we demonstrated that the OFDMA system using the Pilot Assisted Channel Estimation (PACE) performs poorly at high-vehicle speed. Hence we introduce a static RLS channel equalization assisted OFDMA system which outperforms the former OFDMA system by 2 dB at the target BER of 0.1. Moreover, in order to reduce the power consumption of the OFDMA receiver equipped with the static RLS equalization, we propose a novel dynamic RLS channel equalization assisted OFDMA system. In the simulation results, we showed that when the high-level modulation 64-QAM was exploited, the proposed dynamic RLS channel equalization assisted OFDMA system outperformed the PACE aided counterpart system by about 4 dB at the target BER of 0.05.