Massive MIMO is an antenna technology that is considered the most promising for future superfast 5G networks, although researchers have until now believed that there is an upper limit for how much data can be transferred. LiU researcher Emil Björnson has shown that there is no such limit.
Pilot Contamination
The massive MIMO technology aroused the interest of 5G researchers at an early stage. However, during the past five to ten years the research community has agreed that there is an upper limit to how much data can be transferred wirelessly per second, given a certain bandwidth and within a certain area. The limiting factor has been a type of disturbance that arises when measuring how the wireless signals travel, known by researchers as “pilot contamination”.
“This conclusion is the result of us using a model that was far too focused on reseach tractability and a method that was too simple,” says Emil Björnson.
By deploying more antennas and processing the signals that are transmitted and received from them in the right way, we can create a system in which there is no upper limit for how much data can be transferred.
He has presented the evidence for this in collaboration with colleagues in France and Italy in an article that has been published both in the open service Arxiv and in the IEEE digital service Xplore. The simulation code is also freely available at Github for anyone who doubts the results and wants to validate them.
Massive MIMO
MIMO is an acronym for “Multiple Input, Multiple Output” and the technology involves connecting hundreds of small antennas, each with a power of around 10 mW, either in something that can resemble a large computer monitor or distributed across the façade of a building.
The three researchers discovered the solution to the “pilot contamination problem” while working with the book “Massive MIMO Networks: Spectral, Energy and Hardware Efficiency.”All the antennas send a few tens of signals with carefully determined delays. The delays are chosen so that the copies of a signal arrive at the intended receivers at exactly the same instant, but at slightly different times at all other receivers. This gives a strong signal at the intended receiver and only a slight disturbance at all the others. Pilot contamination arises when the delays are to be estimated using signals known as “pilots”.
One hundred antennas each of 10 mW gives a power of 1 W, which is distributed among the users. This is considerably less than the 40 W that current antennas use. The low power is enough, since each signal is given in a specified direction. Massive MIMO thus provides a combination of low output power, high energy efficiency and superior capacity, since many receivers can receive signals at the same time. What the new calculations and simulations have shown is that the capacity is infinite.
“The consequence is that we can continue to deploy increasing numbers of antennas, as people consume ever increasing amounts of wireless data, and in this way satisfy the demand,” says Emil Björnson.
The Latest on: Massive MIMO
[google_news title=”” keyword=”Massive MIMO” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Massive MIMO
- MaxLinear, Inc. (NASDAQ:MXL) Q1 2024 Earnings Call Transcripton April 26, 2024 at 5:32 am
Q1 2024 Earnings Call April 24, 2024 MaxLinear, Inc. misses on earnings expectations. Reported EPS is $-0.21 EPS, expectations were $-0.2. MaxLinear, Inc. isn’t one of the 30 most popular stocks among ...
- ZTE reports revenues of $4.22 billion in Q1on April 25, 2024 at 9:18 am
ZTE said it is committed to deeply integrating AI technology with terminals to drive product innovation and intelligent upgrades ...
- Flex receives Ericsson 2023 Supplier Sustainability Awardon April 25, 2024 at 7:01 am
Flex’s renewable energy-powered manufacturing in Poland lowers carbon emissions for Ericsson and its 5G infrastructure equipment customers.
- Communication Test and Measurement Market to Surge, Projected Valuation of US$ 17.78 Billion by 2033on April 24, 2024 at 5:18 am
The communication test and measurement market is expected to grow at a CAGR of 8.3% and reach $17.78 Billion by 2033—data by Future Market Insights.
- Massive MIMO Market Dynamic Resilience Future-Proofing Your Business for Tomorrowon April 21, 2024 at 3:35 pm
A massive MIMO network is more responsive to devices which operate in higher frequency bands due to improved coverage. In particular, this has considerable benefits for obtaining a strong signal ...
- Will Modest Top-Line Growth Buoy Verizon's (VZ) Q1 Earnings?on April 18, 2024 at 6:16 am
Verizon Communications Inc. VZ is scheduled to report first-quarter 2024 results before the opening bell on Apr 22. In the last reported quarter, the telecommunication service provider beat the Zacks ...
- Swisscom expands strategic partnership with Ericssonon April 16, 2024 at 7:57 am
Under the deal, Ericsson will deploy its Massive MIMO portfolio across multiple sites with the main aim of expanding coverage ...
- Ericsson (ERIC) Solution to Upgrade Swisscom's Mobile Networkon April 15, 2024 at 8:45 am
Ericsson ERIC recently announced that it has inked a new multi-year agreement with Switzerland’s leading telecommunications provider, Swisscom. Through the recent expansion of longstanding business ...
- Fundamentals of Massive MIMOon February 26, 2024 at 5:30 pm
Written by pioneers of the concept, this is the first complete guide to the physical and engineering principles of Massive MIMO. Assuming only a basic background in communications and statistical ...
- Massive MIMOon October 9, 2018 at 10:30 am
Massive MIMO has quickly established itself as a crucial 5G technology, particularly below 6 GHz where enhanced spectral efficiency is paramount. By focusing on spatial multiplexing, a massive MIMO ...
via Bing News