Carrier Frequency Offset Estimation Approach for Multicarrier Transmission on Hexagonal Time-Frequency Lattice

TL;DR

This paper proposes a new carrier frequency offset estimation method for hexagonal multi-carrier systems, including a preamble design and algorithm, achieving near-optimal performance as indicated by the Cramer-Rao bound.

Contribution

It introduces a novel preamble structure and estimation algorithm specifically for HMCT systems, with theoretical analysis and simulation validation.

Findings

Achieves estimation performance close to the Cramer-Rao lower bound

Provides a closed-form expression for the Cramer-Rao bound

Demonstrates effectiveness over doubly dispersive channels

Abstract

In this paper, a novel carrier frequency offset estimation approach, including preamble structure, carrier frequency offset estimation algorithm, is proposed for hexagonal multi-carrier transmission (HMCT) system. The closed-form Cramer-Rao lower bound of the proposed carrier frequency offset estimation scheme is given. Theoretical analyses and simulation results show that the proposed preamble structure and carrier frequency offset estimation algorithm for HMCT system obtains an approximation to the Cramer-Rao lower bound mean square error (MSE) performance over the doubly dispersive (DD) propagation channel.