# Uplink Sum-Rate and Power Scaling Laws for Multi-User Massive MIMO-FBMC Systems

## TL;DR

This paper provides a comprehensive analysis of uplink sum-rate and power scaling laws for multi-user massive MIMO systems employing FBMC signaling, including theoretical derivations, multi-cell considerations, and performance comparisons with OFDM.

## Contribution

It introduces closed-form expressions for sum-rate bounds and power scaling laws in MU massive MIMO-FBMC systems, extending analysis to multi-cell scenarios with imperfect CSI and pilot contamination.

## Key findings

- Analytical sum-rate bounds match simulations closely.
- Power scaling laws are derived for FBMC-based massive MIMO.
- FBMC performance is compared with OFDM, showing competitive advantages.

## Abstract

This paper analyses the performance of filter bank multicarrier (FBMC) signaling in conjunction with offset quadrature amplitude modulation (OQAM) in multi-user (MU) massive multiple-input multiple-output (MIMO) systems. Initially, closed form expressions are derived for tight lower bounds corresponding to the achievable uplink sum-rates for FBMC-based single-cell MU massive MIMO systems relying on maximum ratio combining (MRC), zero forcing (ZF) and minimum mean square error (MMSE) receiver processing with/without perfect channel state information (CSI) at the base station (BS). This is achieved by exploiting the statistical properties of the intrinsic interference that is characteristic of FBMC systems. Analytical results are also developed for power scaling in the uplink of MU massive MIMO-FBMC systems. The above analysis of the achievable sum-rates and corresponding power scaling laws is subsequently extended to multi-cell scenarios considering both perfect as well as imperfect CSI, and the effect of pilot contamination. The delay-spread-induced performance erosion imposed on the linear processing aided BS receiver is numerically quantified by simulations. Numerical results are presented to demonstrate the close match between our analysis and simulations, and to illustrate and compare the performance of FBMC and traditional orthogonal frequency division multiplexing (OFDM)-based MU massive MIMO systems.