cooperative wireless communications and wireless network coding

this research is done within a project Taming the Interference in Wireless Networks through Utilization of A Priori Information (TAIWAP). The project is funded by the Danish Research Council for Technology and Production. specific topics:
  • signalling schemes for two-way and multi-way relay scenarios
  • application of wireless network coding ideas to femtocells
  • physical-layer network coding for multi-way relaying
  • information-theoretic aspects of two-way relaying
  • implementation aspects:
    • physical-layer network coding implementation in GNU radio
    • wireless network coding implementation using GNU radio and
      MSP430 (Texas Instruments). The equipment is supplied in collaboration
      with Texas Instruments, via the University Program. More information can be found at http://www.coop-sdr.es.aau.dk/ 

cognitive radio and dynamic spectrum access

part of this research is funded by Agilent Technologies and part by the research project Dynamic Spectrum Management and System Behaviour in Cognitive Radio granted by the Danish Research Council for Technology and Production (project leader is Dr. Hiroyuki Yomo).  specific topics:
  • opportunistic interference cancellation
  • analysis of cognitive radio systems with outage contraints
  • game-theoretic analysis of primary-secondary scenarios where the primary controls the interference via randomized power control
  • interference cancellation for cognitive terminals with multiple antennas
  • investigation of secondary capacity of the existing communication protocols
communication and networking for RFID systems
  • design of reliable protocols for dealing with missing RFID tags
  • techniques and MAC-layer protocols for dealing with false positive readings ofr RFID tags
  • anti-collision protocols for cooperative RFID readers
  • modeling and analysis of the receiver at the tag and the reader
scheduling and link feedback for OFDM systems
  • randomized protocols for feeding back channel state information in multi-user OFDMA systems
ARQ protocols for MIMO wireless systems
  • ARQ protocols for MIMO systems with multiple users in a broadcast scenario
multimedia streaming by using multiple description coding
  • transmission schemes with in-network compression of descriptions
secure wireless communications
  • communication protocols with physical-layer security mechanisms