6th International ICST Conference on Communications and Networking in China

Research Article

Fully Reconfigurable Cognitive OFDMA Testbed

  • @INPROCEEDINGS{10.1109/ChinaCom.2011.6158290,
        author={Lianxiang Wang and Zhaoyang Zhang and Lu Ye and Benkang Gong and Wentao Lou},
        title={Fully Reconfigurable Cognitive OFDMA Testbed},
        proceedings={6th International ICST Conference on Communications and Networking in China},
        keywords={reconfigurable cognitive ofdma testbed sensing aic},
  • Lianxiang Wang
    Zhaoyang Zhang
    Lu Ye
    Benkang Gong
    Wentao Lou
    Year: 2012
    Fully Reconfigurable Cognitive OFDMA Testbed
    DOI: 10.1109/ChinaCom.2011.6158290
Lianxiang Wang1,*, Zhaoyang Zhang1, Lu Ye1, Benkang Gong1, Wentao Lou1
  • 1: Zhejiang University
*Contact email: qingshui1987@zju.edu.cn


In this paper, we report our design and implementation of a testbed for demonstration of cognitive OFDMA transmission. Our implementation is based on a powerful fully programmable software radio platform, i.e., the Microsoft Research Software Radio(MRSR) platform. Two kinds of nodes are designed in the testbed, one acts as the primary user(PU) which communicates in the authorized frequency band with dynamic spectrum activity, and the other acts as the secondary user(SU) which opportunistically access the vacant frequency without disrupting the transmission of primary user. To this end, the SU nodes are equipped with reliable multi-carrier sensing functionality, as well as some special multi-channel signalling and processing capabilities. Test results show that the SU nodes can alter their power, frequency and other parameters dynamically and communicate efficiently in response to the PU's spectrum activity.