Low-latency implementation of DFT-based transform domain channel estimation system in mobile WiMAX system

Authors:
Seong-Seob Shin;Seung-Yerl Lee;Kyu-Yeul Wang;Jae-Young Choi;Duck-Jin Chung
Affiliations:
School of Information and Communication Engineering, Inha University, Incheon, Korea;School of Information and Communication Engineering, Inha University, Incheon, Korea;School of Information and Communication Engineering, Inha University, Incheon, Korea;School of Information and Communication Engineering, Inha University, Incheon, Korea;School of Information and Communication Engineering, Inha University, Incheon, Korea
Venue:
ISCIT'09 Proceedings of the 9th international conference on Communications and information technologies
Year:
2009

Citing 2
Cited 0

CHANNEL ESTIMATION FOR WIRELESS OFDM SYSTEMS

IEEE Communications Surveys & Tutorials
Decision Directed Channel Estimation Aided OFDM Employing Sample-Spaced and Fractionally-Spaced CIR Estimators

IEEE Transactions on Wireless Communications

Quantified Score

Hi-index	0.00

Visualization

Abstract

In this paper, low-latency implementation of adaptive discrete Fourier transform (DFT) based channel estimator for Mobile WiMAX system is proposed. DFT based channel estimation improve the performance by suppressing time domain noise. However, conventional method use fixed channel impulse response (CIR) length which can cause significantly performance degradation in fast fading channel. In order to overcome this disadvantage, we proposed low-latency threshold based adaptive CIR estimation scheme. The proposed architecture exploit fast Fourier transform characteristic to achieve low-latency implementation. Simulation results show that the proposed method outperforms the conventional DFT-based with low-latency implementation.