Research Areas
In the field of wireless communications, we have several focal research themes which are shortly described on this site.
Communication theory and fundamentals
In this research area, we study information, coding and modulation theory fundamentals that form the basis of all electrical and electro-magnetic communication systems. Depending on the applications, the emphasis is on the analysis and optimization of spectral-efficiency or energy-efficiency and understanding their tradeoffs, while taking also latency- and hardware constraints into account.
More detailed information about our research including publications and media can be found behind the link below.
Radio access techniques and systems
In this research area, we develop optimized physical (PHY) layer, medium access control (MAC) layer and networking layer methods and protocols for different radio access networks, with specific emphasis on 5G and beyond mobile communications, to meet the increasing requirements in terms of peak data-rates, latency, capacity and number of supported devices, while taking also the sustainable energy consumption into account. The work includes, e.g., advanced waveforms, novel transceiver algorithms, localized and distributed massive antenna arrays, and different interference avoidance/coordination/mitigation solutions, and covers the radio spectrum up to high-end of the mmWave band. We also study scheduling and mobility management methods, carry out propagation modeling and measurements, and study radio network planning and optimization from techno-economical and sustainability points of view.
More detailed information about our research including publications and media can be found behind the link below.
Radio positioning and localization
In the positioning and location-awareness research area, we seek to develop not only high-efficiency positioning algorithms for various use-cases through sophisticated data fusion and signal processing solutions, but also location-aware methods utilizing the positioning information in order to enhance the network functionalities by means of proactive radio resource management and location-based beamforming, for instance.
More detailed information about our research including publications and demonstrations can be found behind the link below.
Radio sensing and RF convergence
In this area, we study and develop new radar and other radio sensing technologies, with applications in commercial and defense/security domains. New waveforms and signal processing solutions in time, frequency and spatial domains are studied, developed and demonstrated. We also study and develop the concept of RF convergence or multi-functional RF systems, where radar and radio communication functionalities are merged to same frequencies and/or hardware platforms. Good examples are e.g., the potential use of mobile network base-stations as OFDM radars, while sending the downlink data signal, or embedding or modulating digital data into radar waveforms.
More detailed information about our research including publications and media can be found behind the link below.
Radio transceivers and signal processing
In this area, we develop new radio transmitter and radio receiver architectures, in terms of frequency conversions, amplification and filtering while also address the challenges related to analog-digital (A/D) and digital-analog (D/A) conversion interfaces. We also develop novel signal processing solutions to mitigate critical RF impairments, good examples being power amplifier (PA) linearization through digital predistortion (DPD) as well as estimation, tracking and mitigation of RF oscillator phase noise.
More detailed information about our research including publications and media can be found behind the link below.
RF microelectronics and embedded computing
In this research area, we design, fabricate and measure new radio frequency integrated circuits (RFICs) for communications and sensing systems. We also develop new energy- and hardware-efficient embedded computing solutions for communications, positioning and sensing.
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Full-duplex
In this research area, we study wireless networks and transceiver systems where the devices are transmitting and receiving simultaneously at the same center-frequency. This offers potential for reduced latencies and increased spectral efficiency, compared to ordinary TDD and FDD based systems, but also introduces an inherent self-interference challenge.
More detailed information about our research including publications and media can be found behind the link below.
UAV communications
In this research area, we study the radio connectivity of UAVs with specific emphasis on getting the UAVs and other flying objects connected to the mobile networks. The work covers optimizing the radio access methods, radio protocols as well as networks deployments to simultaneously serve both UAVs as well as the more ordinary devices on the ground through the same network. Additionally, the use of UAVs as flying base-stations is studied.
More detailed information about our research including publications and media can be found behind the link below.
Wireless for vertical industries
In this more applied area, we adopt and tailor the latest wireless technologies for the benefit of different vertical industries, such as future factories, future harbours and energy distribution networks. This is the best breed of wireless Industrial Internet, covering also vertical industries related radio positioning and radio sensing solutions.
More detailed information about our research including publications and media can be found behind the link below.
Nano- and bio-communications
In this research area, we study networks of embedded computing devices, based on nanomaterials such as graphene or metamaterials, as well as biomaterials, having scales ranging from one to a few hundred nanometers, called nanothings. We study and develop methods to enable such nanothings to cooperatively perform sensing, actuation, processing, and networking.
More detailed information about our research including publications and media can be found behind the link below.