Circuits and Systems for Cognitive Radio Front-EndsRWTH IAS
Digitization of TV bands have resulted in under-utlized whitespaces in 470-790 MHz which can be a solution to ever increasing spectrum demand. This area of research at IAS focusses on the system and circuit design of Cognitive Radios which can provide a frequency agile wideband radio for above mentioned UHF frequencies.
Circuits and Systems for Cognitive Radio Front-Ends
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Design of wideband front for 802.11 b/g based devices is being researched here. A TDD prototype is developed from off-the-shelf commercial components for WLAN based cogntive radio.
This BMBF funded project focusses on the complete cognitive radio system for the LTE devices. At IAS, the RF front end design for such a design is being researched. As the first stage of this project, a high linear front end is built using commercially available components and the second stage aims an integrated solution.
Heinen, S.; Ashok, A.; Varga, G.; Schrey, M.; Subbiah, I.; "Cellular Cognitive Radio: An RF Point of View", IEEE International Workshop on Cognitive Cellular Systems (CCS)2014.
Subbiah, I.; Ashok,A.; Varga, G.; Schrey, M.; Heinen, S.,"System Design of a High-IF to UHF Converter Enabling Cognitive Radio", IEEE International Workshop on Cognitive Cellular Systems (CCS)2014.
Schrey; M.; Varga, G.; Ashok, A.; Subbiah, I.; Heinen,S.;"RF Frequency Converters for White Space Devices", IEEE International Workshop on Cognitive Cellular Systems (CCS)2014.
Ashok, A.; Subbiah, I.; Varga, G.; Schrey, M.; Achtzehn,A.; Petrova,M.; Heinen,S.;"whiteLAN: facilitate cost-efficient SDR research with cots ieee 802.11b/g devices", Proceeding of the 2014 ACM Workshop on Software Radio Implementation Forum (SRIF'14)
Varga, G; Schrey; M. Subbiah, I; Ashok, A; " A Broadband RF Converter Empowering Cognitive Radio Networks in the TV White Space", IEEE International Workshop on Local and Metropolitian Area Networks (LANMAN) 2014.
Ashok, A.; Subbiah, I.; Varga, G.; Schrey, M.; Heinen, S., "Radio Front-End Enabling WLAN over White Spaces Cognitively, " IEEE Wireless and Microwave Technology Conference (WAMICON) 2014.
Subbiah, I.; Schrey, M.; Ashok, A.; Varga, G.; Achtzehn, A.; Petrova, M.; Heinen, S., "Design of a TV White Space Converter Prototype Towards Cognitive Radio for WLAN Routers," Cognitive Radio Oriented Wireless Networks (CROWNCOM), 2013 8th International Conference on , vol., no., pp.208,213, 8-10 July 2013
Ashok, A.; Subbiah, I.; Heinen, S., "System Design for an Experimental Cognitive Transceiver," Ph.D. Research in Microelectronics and Electronics (PRIME), 2013 9th Conference on , vol., no., pp.229,232, 24-27 June 2013