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Professor Andrew Nix

Wireless Communication Systems

During the 1990’s Professor Nix's WLAN research activities helped to form a significant part of the first WLAN standard (ETSI HIPERLAN). He continued to innovate in this area via a range of collaborative European Union (EU) projects, such as SATURN, WCAM and ROMANTIK. As a member of the OSIRIS project team (a £2.1M University Innovation Centre) he participated in the development of one of the world’s first hardware prototypes for a Multiple Input Multiple Output (MIMO) High Throughput (HT) WLAN. Through collaboration with Toshiba he also worked on the design of a Gigabit WLAN system. He works closely with industry, with well known examples including BSKYB, BT, DSTL, Jaguar Land Rover, NSN, Saab and Toshiba.

Professor Nix has developed a number of innovative indoor and outdoor propagation models. The indoor models have been used to help optimize a number of commercial wireless communication designs, including Bluetooth, WLAN, TVWS and UWB transceivers. His outdoor model was the first to successfully predict the MIMO matrix channel, with measurement validation reported in the May 2007 edition of the IEEE Transactions on Vehicular Technology. The outdoor models are still in development and are currently in use on a number of communication (TV White Space, Wi-Fi and LTE coverage studies) and radar coexistence projects. These models are unique in being able to model large urban areas (150 square kilometers of central London) with full 3D building, irregular terrain and foliage information. The latest improvements allow the modelling of radio communications to/from airborne platforms.

He works closely with the Visual Information Laboratory, where he has co-developed a range of robust wireless video transmission techniques. These range from novel packetisation and link-adaptation algorithms to new ways to jointly encode and transmit video over MIMO channels. This work was core to several grants, including VIGELANT (EPSRC) and VISUALISE (a £1.1M Technology Strategy Board funded project). Results from these projects have led to significant commercial exploitation in the area of multicast video to handsets. This work continues in the TSB funded AIYP (Arkive In Your Pocket) project.

His current research interests cover 3G and 4G cellular technologies; most notably OFDMA and SC-FDMA. These methods are exploited in emerging standards such as WiMAX and LTE. Through a number of PhD programmes he has contributed to the development of standard compliant physical layer simulation tools for WiMAX (in collaboration with Nokia Siemens Networks) and LTE. At present he is working on intelligent scheduling algorithms that enhance power and spectral efficiency, while reducing the impact of co-channel interference. This relies on significant cross layer interaction between the physical and MAC layers.
He has filed 12 international patents, several of which have been licensed by major industrial organisations.

View a Selection of Professor Andrew Nix's publications

Research keywords

  • Radiowave Propagation Modelling
  • LTE
  • 802.11
  • WiMAX
  • TVWS
  • Co-ordinated Beam Forming