Research Article
Design of a TV White Space Converter Prototype Towards Cognitive Radio for WLAN Routers
@INPROCEEDINGS{10.4108/icst.crowncom.2013.252073, author={Iyappan Subbiah and Moritz Schrey and Arun Ashok and Gabor Varga and Andreas Achtzehn and Marina Petrova and Stefan Heinen}, title={Design of a TV White Space Converter Prototype Towards Cognitive Radio for WLAN Routers}, proceedings={8th International Conference on Cognitive Radio Oriented Wireless Networks}, publisher={ICST}, proceedings_a={CROWNCOM}, year={2013}, month={11}, keywords={cognitive radio whitespace 80211 frontend}, doi={10.4108/icst.crowncom.2013.252073} }- Iyappan Subbiah
Moritz Schrey
Arun Ashok
Gabor Varga
Andreas Achtzehn
Marina Petrova
Stefan Heinen
Year: 2013
Design of a TV White Space Converter Prototype Towards Cognitive Radio for WLAN Routers
CROWNCOM
IEEE
DOI: 10.4108/icst.crowncom.2013.252073
Abstract
We report on the development of a frequency converter frontend that enables 2.4 GHz IEEE 802.11 WLAN devices to operate in unused parts of the UHF spectrum, the so-called TV whitespaces. The new frontend features separate TX and RX paths with automatic directionality switching and in-hardware energy detection. Equipped with a standard antenna port at the input side, and a fully configurable transmit chain controlled through a user-accessible microcontroller, this whitespace converter (WSC) with commercial off-the-shelf components is particularly suitable for cognitive radio (CR) research. We discuss the specific challenges in the design of a WSC for 802.11 WLAN routers. The complete architecture is presented, and preliminary performance results from a level plan optimization are discussed.