Dual-Polarization FBMC for Improved Performance in Wireless Communication Systems

TL;DR

This paper introduces dual-polarization FBMC (DP-FBMC), a novel wireless communication system that significantly reduces intrinsic interference in FBMC, enhances robustness in dispersive channels, and simplifies receiver processing.

Contribution

The paper proposes a new DP-FBMC system using dual polarizations to suppress intrinsic interference and improve performance, with three different multiplexing structures analyzed.

Findings

DP-FBMC effectively suppresses intrinsic interference.

DP-FBMC is more robust to channel dispersion, CFO, and TO.

One DP-FBMC structure matches conventional FBMC complexity.

Abstract

Filter bank multi-carrier (FBMC) offers superior spectral properties compared to cyclic-prefix orthogonal frequency-division multiplexing (CP-OFDM), at the cost of an inherent shortcoming in dispersive channels called intrinsic imaginary interference. In this paper we propose a new FBMC based communication system using two orthogonal polarizations for wireless communication systems: dual-polarization FBMC (DP-FBMC). Using this system we can significantly suppress the FBMC intrinsic interference. Therefore in DP-FBMC all the multicarrier techniques used in CP-OFDM systems such as channel equalization, etc., should be applicable without using the complex processing methods required for conventional FBMC. DP-FBMC also has other interesting advantages over CP-OFDM and FBMC: it is more robust in highly dispersive channels, and also to receiver carrier frequency offset (CFO) and timing offset (TO). In our DP-FBMC system we propose three different structures based on different multiplexing techniques. We show that compared to conventional FBMC, one of these DP-FBMC structures has equivalent complexity and equipment requirements. We compare DP-FBMC with other systems through simulations. According to our results DP-FBMC has potential as a promising candidate for future wireless communication networks.