作者
Abid Muhammad Khan, Varun Jeoti, Muhammad Zaka Ur Rehman, Muhammad Taha Jilani, Omer Chugtai, Mubashir Hussain Rehmani
发表日期
2018
期刊
Journal of Computer Networks and Communications
卷号
2018
期号
1
页码范围
9319204
出版商
Hindawi
简介
The estimation of signal‐to‐noise ratio (SNR) is a major issue in wireless orthogonal frequency‐division multiplexing (OFDM) system. In OFDM system, each frame starts with a preamble symbol that facilitates the SNR estimation. However, the performance of preamble‐based SNR estimation schemes worsens in the fast‐changing environment where channel changes symbol to symbol. Accordingly, in this paper, we propose a novel pilot‐based SNR estimation scheme that optimally exploits the pilot subcarriers that are inserted in each data symbol of the OFDM frame. The proposed scheme computes the circular correlation between the received signal and the comb‐type pilot sequence to obtain the SNR. The simulation results are compared with the conventional preamble‐based Zadoff‐Chu sequence SNR estimator. The results indicate that the proposed scheme generates near‐ideal accuracy; especially in low …
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AM Khan, V Jeoti, MZU Rehman, MT Jilani, O Chugtai… - Journal of Computer Networks and Communications, 2018