Pilot design for BEM-Based channel estimation in doubly selective channel

• Main Authors: Anand, Kushal, Guan, Yong Liang, Liu, Xiaobei, Liu, Zilong, Yang, Yang, Zhou, Zhengchun, Fan, Pingzhi, Gunawan, Erry
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2023
• Subjects: Engineering::Electrical and electronic engineering::Wireless communication systems; Doubly-Selective Channels; Channel Estimation
• Online Access: https://hdl.handle.net/10356/164977
• Institution: Nanyang Technological University

This paper investigates pilot design for enhanced channel estimation in single carrier communication systems over doubly-selective channels (DSC). Our contribution is twofold: first, we propose to use Huffman sequences as pilot clusters with low peak-to-average power ratio (PAPR), yet with good channel estimation performance when periodic pilot placement is adopted; second, we propose a low-complexity pilot placement strategy based on the analysis of the complex-exponential basis expansion model (CE-BEM) of the DSC. The latter leads to improved channel estimation performance with useful insights for pilot placement.