University of Hertfordshire Radio
Radio and mobile communication systems
The research activity in this group is mainly concerned with the emerging enabling physical layer technologies for future generation wireless and mobile communication systems and networks. We aim to achieve seamless, high speed, energy-efficient and adaptive networking for ubiquitous broadband multimedia communications. For this, we conduct research widely, ranging from circuits and components to systems and networks and covering both cellular mobile and wireless networks, using latest standards of WiMax, LTE and WLAN.
Current research topics of the group fall broadly into two main themes:
- Wireless and Mobile Communication Networks
- RF Communication Circuits and Systems
The theme of Wireless and Mobile Communication Networks covers multiantenna, multicarrier and multiuser technologies, cooperative and relay communications, cognitive radio communications, and green wireless networks. There are several on-going projects in these areas, which include channel estimation and frequency synchronisation, MIMO detection and space-time coding, MIMO-OFDM systems, multiuser and multicell MIMO, massive MIMO and VMIMO, interference channel and alignment, cooperative space-time coding and relay selection, spectrum sensing and cognitive radio, low power and energy-efficient techniques, wireless sensor networks, and vehicular communications. Some projects involve implementation of communication algorithms using FPGA.
In the RF Communication Circuits and Systems theme, the research is mainly concerned with RF, analogue and mixed-signal circuits, low power single-chip wireless transceivers, and reconfigurable software-defined multi-standard radio. We have been focusing on continuous-time filters and amplifiers, impedance matching networks and antenna tuning systems, testing and diagnosis of electronic systems, signal generators and spectrum analysers, reconfigurable basedband and RF frontend, high-speed data converters and continuous-time sigma-delta modulators, low power and low voltage circuits, RF energy harvesting and power circuits, and biomedical circuits and systems. We mainly use CMOS integration technology in design and implementation of communication circuits.
The group has enjoyed strong international collaboration and industrial support. We have hosted many visiting scholars from overseas academia and visiting fellows from global industry.