28 April 2010 Software defined radio based multi-carrier multi-function waveform for cognitive radio
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In this paper, we demonstrate an adaptive multicarrier multi-function waveform generator for cognitive radio via software defined radio. Using a USRP (universal software radio peripheral) software defined radio boards and GNU radio software, we implement a multi-carrier waveform generator which can generate multi-function waveforms such as OFDM, NC-OFDM, MC-CDMA, NC-MC-CDMA, CI/MC-CDMA, NCCI/ MC-CDMA, TDCS for cognitive radio. Additionally, we demonstrate a portable overlay cognitive radio using this multicarrier multi-function waveform generator. This cognitive radio is capable of detecting primary users in real time and adaptively adjusting its transmission parameters to avoid interference to primary users. More importantly, this cognitive radio can take advantage of multiple spectrum holes by employing non-contiguous multi-carrier transmission technologies. Additionally, we demonstrate that when the primary user transmission changes, the cognitive radio dynamically adjusts its transmission accordingly. We also demonstrate seamless real time video transmission between two cognitive radio nodes, while avoiding interference from primary users and interference to primary users operating in the same spectrum.
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Ruolin Zhou, Ruolin Zhou, Xue Li, Xue Li, Vasu Chakravarthy, Vasu Chakravarthy, Zhiqiang Wu, Zhiqiang Wu, } "Software defined radio based multi-carrier multi-function waveform for cognitive radio", Proc. SPIE 7707, Defense Transformation and Net-Centric Systems 2010, 770705 (28 April 2010); doi: 10.1117/12.853603; https://doi.org/10.1117/12.853603


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