Joonas Kokkoniemi

Joonas Kokkoniemi
University of Oulu · Centre for Wireless Communications (CWC)

Dr. Sc. (Tech.)

About

56
Publications
27,952
Reads
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1,201
Citations
Additional affiliations
April 2017 - March 2020
University of Oulu
Position
  • PostDoc Position
July 2011 - April 2017
University of Oulu
Position
  • Research Assistant
Education
March 2012 - April 2017
University of Oulu
Field of study
  • Communications Engineering
May 2011 - March 2012
University of Oulu
Field of study
  • Communications Engineering
September 2006 - May 2011
University of Oulu
Field of study
  • Communications Engineering

Publications

Publications (56)
Chapter
Free space path loss for THz communication is discussed. Molecular absorption mainly caused by water vapor is a major effect in terahertz propagation in the atmosphere. Both experimental and theoretical results are also discussed using the ITU models and the am model. A simplified model for molecular absorption that enables analytical study of THz...
Preprint
Full-text available
Upcoming beyond fifth generation (5G) communications systems aim at further enhancing key performance indicators and fully supporting brand new use cases by embracing emerging techniques, e.g., reconfigurable intelligent surface (RIS), integrated communication, localization, and sensing, and mmWave/THz communications. The wireless intelligence empo...
Preprint
In this paper, we utilize tools from stochastic geometry to estimate the interference propagation via reconfigurable intelligent surface (RIS) in the millimeter wave (mmWave, 30-300 GHz) band and specifically on the D band (110-170 GHz). The RISs have been of great interest lately to maximize the channel gains in non-line-of-sight (NLOS) communicat...
Technical Report
Full-text available
This white paper on AI and ML as enablers of beyond 5G (B5G) networks is based on contributions from 5G PPP projects that research, implement and validate 5G and B5G network systems. The white paper introduces the main relevant mechanisms in Artificial Intelligence (AI) and Machine Learning (ML), currently investigated and exploited for 5G and B5G...
Preprint
Full-text available
Reconfigurable intelligent surfaces (RISs) are considered as potential technologies for the upcoming sixth-generation (6G) wireless communication system. Various benefits brought by deploying one or multiple RISs include increased spectrum and energy efficiency, enhanced connectivity, extended communication coverage, reduced complexity at transceiv...
Article
Full-text available
This paper documents a simple parametric polynomial line-of-sight channel model for 100–450 GHz band. The band comprises two popular beyond fifth generation (B5G) frequency bands, namely, the D band (110–170 GHz) and the low-THz band (around 275–325 GHz). The main focus herein is to derive a simple, compact, and accurate molecular absorption loss m...
Article
Wireless connectivity in airplanes is becoming more important, demanded, and common. One of the largest bottlenecks with the in-flight Internet is that the airplane is far away from both the satellites and the ground base stations during most of the flight time. Maintaining a reliable and high-rate wireless connection with the airplane over such a...
Article
Providing high-bandwidth and fast-speed links, wireless local area networks (WLANs) in the Terahertz (THz) band have huge potential for various bandwidth-intensive indoor applications. However, due to the specific phenomena in the THz band, including severe reflection loss, indoor blockage effects, multi-path fading, the analysis on the interferenc...
Preprint
Wireless connectivity in airplanes is becoming more important, demanded, and common. One of the largest bottlenecks with the in-flight Internet is that the airplane is far away from both the satellites and the ground base stations during most of the flight time. Maintaining a reliable and high-rate wireless connection with the airplane over such a...
Conference Paper
Full-text available
The paper studies the joint impact of phase noise (PN) and co-channel interference (CCI) in indoor terahertz (THz) uplink. We formulate the theoretical framework that quantifies the impact of PN on the transceiver antenna directivity by extracting exact closed-form and low-complexity tight approximations for the expected gains. Additionally, by emp...
Article
Full-text available
This paper focuses on deriving expected values for the transmit (TX) and receive (RX) antenna gains in terahertz (THz) wireless fronthaul and backhaul links under stochastic beam misalignment, which is created by antenna movement coming from the building or antenna mast swaying. In particular, four different antenna movement models are considered:...
Preprint
This paper documents a simple parametric polynomial line-of-sight channel model for 100-450 GHz band. The band comprises two popular beyond fifth generation (B5G) frequency bands, namely, the D band (110-170 GHz) and the low-THz band (around 275-325 GHz). The main focus herein is to derive a simple, compact, and accurate molecular absorption loss m...
Technical Report
Full-text available
As fifth generation (5G) research is maturing towards a global standard, the research community must focus on the development of beyond-5G solutions and the 2030 era, i.e. 6G. It is not clear yet what 6G will entail. It will include relevant technologies considered too immature for 5G or which are outside the defined scope of 5G. This white pape...
Book
Full-text available
As fifth generation (5G) research is maturing towards a global standard, the research community has started to focus on the development of beyond-5G solutions and the 2030 era, i.e. 6G. In the future, our society will be increasingly digitised, hyper-connected and globally data driven. Many widely anticipated future services will be critically depe...
Article
Future smart vehicles will incorporate high-data-rate communications and high-resolution radar sensing capabilities operating in the millimeter-wave and higher frequencies. These two systems are preparing to share and reuse many common functionalities, such as steerable millimeter-wave antenna arrays. Motivated by this growing overlap, which is adv...
Research
Full-text available
The present white paper focuses on the wireless terahertz system applications for communication networks beyond 5G in the context of the TERRANOVA H2020 project. This document translates the state of the art knowledge as reflected among TERRANOVA consortium partners in what relates to the specific applications for the Optical–Terahertz system that...
Preprint
Full-text available
Future smart vehicles will incorporate high-data-rate communications and high-resolution radar sensing capabilities operating in the millimeter-wave and higher frequencies. These two systems are preparing to share and reuse a lot of common functionalities, such as steerable millimeter-wave antenna arrays. Motivated by this growing overlap, and adva...
Preprint
Full-text available
The present white paper focuses on the system requirements of TERRANOVA. Initially details the key use cases for the TERRANOVA technology and presents the description of the network architecture. In more detail, the use cases are classified into two categories, namely backhaul & fronthaul and access and small cell backhaul. The first category refer...
Conference Paper
In this paper, we present a novel two-array channel model for wireless terahertz (THz) systems operat- ing in the range of 275 to 400 GHz, which accommodates both the channel particularities and the transceivers pa- rameters. The channel particularities include the frequency selectivity, path-loss, as well as the atmospheric conditions, namely temp...
Conference Paper
We present some preliminary measurement results for the reflection properties of common indoor materials for 300 and 1000 GHz frequencies. These material include various wooden surfaces, concrete, rubber floor surface, and glass. All the presented materials are very smooth and only have a very small amount of diffuse scattering. For smooth surfaces...
Research
The present white paper focuses on the system requirements of TERRANOVA. Initially details the key use cases for the TERRANOVA technology and presents the description of the network architecture. In more detail, the use cases are classified into two categories, namely backhaul & fronthaul and access and small cell backhaul. The first category refer...
Conference Paper
In this paper, we establish the appropriate system model for the terahertz (THz) wireless link in the range of 275 to 400 GHz, which accommodates the channel particularities and transceivers parameters. The channel particularities include the frequency selectivity, pathloss, as well as the atmospheric conditions, namely temperature and pressure, wh...
Article
Full-text available
This article discusses the basic system architecture for terahertz (THz) wireless links with band- widths of more than 50 GHz into optical networks. New design principles and breakthrough technologies are required in order to demonstrate Tbps data-rates at near zero-latency using the proposed system concept. Specifically, we present the concept of...
Article
Full-text available
Communications systems operating in the millimeter and terahertz band have been recently suggested to enable high data-rate vehicle-to-vehicle communications in future networks. However, massive deployment of such systems may lead to significant interference, affecting the performance of information transmission. While the multipath interference ca...
Article
Full-text available
Impulse response is vital for wireless communication analysis and modeling. This paper considers the impulse response of the terahertz band (THz band: 0.1–10 THz) for short range (1–100 cm) wireless communication. Earlier works derived the impulse response from transmittance by assuming a linear phase, which corresponds to a line-of-sight (LoS) pro...
Conference Paper
Future nanonetworks are formed by large numbers of autonomous, nano-sized sensors. These are often envisioned to be paired with one or more layers of higher complexity devices, providing access to the external networks. The number of devices sharing the same frequency resources can theoretically be very high, up to several hundreds per square meter...
Article
Full-text available
The terahertz (THz) band, 0.1-10 THz, has sufficient resources not only to satisfy the 5G requirements of 10 Gbit/s peak data rate but to enable a number of tempting rate-greedy applications. However, it brings novel challenges, never addressed at lower frequencies. Among others, the scattering of THz waves from any object, including walls and furn...
Article
Mean interference power and probability of outage in the THz band (0.1 – 10 THz) networks are studied. The frequency band has potential for enabling future short range communication systems because of the large available spectrum resources. This can enable huge data rates, or on the other hand, large numbers of users sharing the resources. The latt...
Article
A system enabling simultaneous cooling and board-to-board communications is proposed and analyzed. It is shown that hollow pipes used in computer cooling systems can be applied for communications with extreme data rates at distances up to tens of centimeters. This is done by using wireless communications in the terahertz frequency band, – THz. The...
Conference Paper
Results on penetration loss measurements in the THz frequencies between 0.1-2 THz are reported. The measurements were conducted with time domain spectroscopy using the TeraView TeraPulse 4000 measurement equipment. We concentrate on the frequency-dependent penetration characteristics of various materials typical for indoor environments, providing b...
Conference Paper
Full-text available
Measurement results on rough surface scattering on common indoor materials in the terahertz (THz) band from 100 GHz to 4 THz are reported. The measurements were made using THz time domain spectroscopy (THz-TDS)-based measurement device in multiple transmitter and receiver angles for five different materials: aluminium, glass, plastic, hardboard, an...
Article
This paper focuses on molecular absorption noise caused by molecular absorption in the higher frequency bands, such as THz band (0.1-10 THz). This transmission induced noise has been predicted to exist in the THz band, since the conservation of energy requires the conservation of the absorbed energy in the medium. There exist multiple models for th...
Conference Paper
We analyze the energy detection performance under multiple scattering conditions in THz band (0.1--10 THz). The analysis focuses on nanonetworks. Thus, limitations on the devices, such as transmit power, is taken into account. We extend our existing multiple scattering model for normally distributed scattering particle size parameters. The primary...
Conference Paper
Frequency domain scattering loss on small particles in terahertz frequency band (0.1–10 THz) is addressed. The wavelengths in THz band are short enough to enable scattering on small particles in the atmosphere. Rayleigh theories are utilized in estimating the scattering loss and it is shown that in proper conditions small particle scattering causes...
Article
Time and frequency domain channel models are proposed for nanonetworks utilizing the terahertz band (0.1-10 THz) for wireless communication. Nanonetworks are formed by tiny nanodevices which consist of nanoscale (molecular scale) components. Channel models capturing the unique peculiarities of the THz band are needed for designing proper physical l...
Conference Paper
European Telecommunication Standards Institute (ETSI) is standardizing the 3GPP Long Term Evolution Advanced (LTE-A) relay nodes (RNs) which are intended to be used for providing enhanced cell edge coverage and capacity. We present simulation results on the prospected LTE-A mobile relay node (MRN) applications. The future vehicles can communicate w...
Conference Paper
Full-text available
Opportunistic use of the 2.4 GHz industrial, scientific, and medical (ISM) band has recently received a growing interest. Numerous measurement campaigns have been conducted to analyze the spectrum use in the ISM band in several locations. However, the parameter setting in measurements regarding the bandwidth and time resolution has not been analyze...
Conference Paper
We present two measurement campaigns reflecting the end-user QoS of a large municipal WiFi (IEEE 802.11 WLAN) network on the end-user QoS of three commercial 3.5G (HSPA) mobile data networks and on the spectrum occupancy of the 2.4 GHz ISM band. Our study shows that municipal provisioning of public wireless Internet access with IEEE 802.11 WLAN tec...
Conference Paper
We performed spectrum occupancy measurements on the 2.45 GHz Industrial, Scientific and Medical (ISM) band in the area of Oulu, Finland. The comprehensive measurement campaign consisted of eight different locations and ten different measurement occasions, each with approximately one week of continuous spectrum monitoring. The measurement data is an...

Projects

Projects (2)
Project
The ARIADNE project plans to bring together a novel high-frequency advanced radio architecture and an Artificial Intelligence (AI) network processing and management approach into a new type of intelligent communications system Beyond 5G. The new intelligent system approach is necessary because the scale and complexity of the new radio attributes in the new frequency ranges cannot be optimally operated using traditional network management approaches.
Project
The 6Genesis flagship is focused on the development of wireless technology, exploring the implementation of the fifth generation of mobile communication technology (5G) and the development of the 6G standard. The flagship will support industry in bringing the 5G standard to the commercialisation stage by carrying out large pilots with a test network. It will also develop essential technology components needed for 6G, targeting areas such as wireless connectivity and distributed intelligent computing and novel applications of these. In addition to communication between people, the research will focus on communication between devices, processes and objects. This will contribute to enabling a highly automated, smart society, which will penetrate all areas of life in the future.