Secrecy Capacity of FBMC-OQAM Modulation over Frequency Selective Channel

Channel Estimation and Detection in FBMC/OQAM System with Affine Precoding and Decoding

We derive the mathematical equations required for channel estimation and data detection of filter bank multi-carrier (FBMC) offset quadrature amplitude modulation (OQAM) systems with affine precoding and decoding. The mean square error (MSE) in least square (LS) channel estimation and bit error rate (BER) of the system is found for different training power coefficients. The proposed system gives better BER performance compared to other cutting edge FBMC systems. The optimum training power coefficient $(σ_{c_{opt}}^2)$ is also found from the simulation results. The band width efficiency of the …

Smoothed SVD-based Beamforming for FBMC/OQAM Systems Based on Frequency Spreading

The combination of singular value decomposition (SVD)-based beamforming and filter bank multicarrier with offset quadrature amplitude modulation (FBMC/OQAM) has not been successful to date. The difficulty of this combination is that, the beamformers may experience significant changes between adjacent subchannels, therefore destroy the orthogonality among FBMC/OQAM real-valued symbols, even under channels with moderate frequency selectivity. In this paper, we address this problem from two aspects: i) an SVD-FS-FBMC architecture is adopted to support beamforming with finer granularity in frequen…

Dual-Polarization OFDM-OQAM Wireless Communication System

In this paper we describe the overall idea and results of a recently proposed radio access technique based on filter bank multicarrier (FBMC) communication system using two orthogonal polarizations: dual-polarization FBMC (DP-FBMC). Using this system we can alleviate the intrinsic interference problem in FBMC systems. This enables use of all the multicarrier techniques used in cyclic-prefix orthogonal frequency-division multiplexing (CP-OFDM) systems for channel equalization, multiple-input/multiple-output (MIMO) processing, etc., without using the extra processing required for conventional FB…

A Novel Two-stage Design Scheme of Equalizers for Uplink FBMC/OQAM-based Massive MIMO Systems

The self-equalization property has raised great concern in the combination of offset-quadratic-amplitude-modulation-based filter bank multi-carrier (FBMC/OQAM) and massive multiple-input multiple-output (MIMO) system, which enables to decrease the interference brought by the highly frequency-selective channels as the number of base station (BS) antennas increases. However, existing works show that there remains residual interference after single-tap equalization even with infinite number of BS antennas, leading to a limitation of achievable signal-to-interference-plus-noise ratio (SINR) perfor…

Robust Precoder for Mitigating Inter-Symbol and Inter-Carrier Interferences in Coherent Optical FBMC/OQAM

In this paper, a new precoder for a coherent optical filter bank multicarrier with offset quadrature amplitude modulation (FBMC/OQAM) system is proposed. The precoder is designed based on an iterative polynomial eigenvalue decomposition (PEVD) algorithm to jointly mitigate the inter-symbol interference (ISI) and inter-carrier interference (ICI). The PEVD algorithm is used to decompose a polynomial channel matrix into polynomial eigenvectors and eigenvalues matrices, then a precoder is designed based on the decomposed matrices. The precoder acts as a filter applied to each subcarrier and to its…

基于数据映射和DFT预编码的低峰均功率比FBMC-OQAM系统

Low Peak-to-Average Power Ratio FBMC-OQAM System based on Data Mapping and DFT Precoding

本文提出一种基于数据映射和DFT预编码的map-DFT-spread FBMC-OQAM方案，通过共轭对称规则映射发射数据并避免OQAM预处理，从而实现比简单DFT扩频更优的PAPR降低，并揭示了PAPR与带外性能的权衡。