Performance Analysis of Cell Free Massive MIMO systems in LoS/ NLoS Channels

11/30/2020
by   Sudarshan Mukherjee, et al.
0

In cellular communication systems, it is conventional to assume the absence of a line of sight (LoS) path between the users and their associated access points (APs). This assumption however becomes questionable in the context of recent developments in the direction of cell free (CF) massive MIMO systems. In the CF massive MIMO, the AP density is assumed to be comparable with the user density, which increases probability of existence of an LoS path between the users and their associated APs. In this paper, we analyze the performance of an uplink CF massive MIMO system, with a probabilistic LoS channel model. Here, we first derive the effective statistics of this channel model, and argue that their behaviour is fundamentally different from that of the conventional rich scattering channels. Utilizing these statistics, we next compare the rates achievable by CF massive MIMO systems, under both stream-wise and joint decoding at the central processing unit. Following this, we also discuss the centralized MMSE based data detection to obtain a complexity/ performance trade-off. Finally, using detailed Monte-Carlo simulations, we validate our analytical results, and evaluate the performance of the three data detection schemes.

READ FULL TEXT
research
05/13/2021

Performance Analysis of Cell-Free Massive MIMO Systems with Massive Connectivity

In this paper, we investigate the performance of cell-free massive MIMO ...
research
08/28/2023

How much Training is Needed in Downlink Cell-Free mMIMO under LoS/NLoS channels?

The assumption that no LoS channels exist between wireless access points...
research
10/25/2020

Performance Analysis of Cell-Free Massive MIMO Systems: A Stochastic Geometry Approach

Cell-free (CF) massive multiple-input-multiple-output (MIMO) has emerged...
research
02/21/2020

Massive MIMO Channel Measurements and Achievable Rates in a Residential Area

In this paper we present a measurement set-up for massive MIMO channel s...
research
07/10/2020

Joint Access Point Selection and Interference Cancellation for Cell-Free Massive MIMO

Cell Free Massive MIMO is a highly promising approach to enhance network...
research
06/10/2023

Energy efficient cell-free massive MIMO on 5G deployments: sleep modes strategies and user stream management

This paper proposes the utilization of cell-free massive MIMO (CF-M-MIMO...
research
12/24/2021

Joint Activity Detection and Channel Estimation in Cell-Free Massive MIMO Networks with Massive Connectivity

Cell-free massive MIMO is one of the key technologies for future wireles...

Please sign up or login with your details

Forgot password? Click here to reset