Chu Yu-Zhi, Zheng Bao-Yu. A Cooperative Transmission Scheme Based on Amplify and Forward in Cognitive Radio Networks[J]. Journal of Electronics & Information Technology, 2011, 33(3): 509-514. doi: 10.3724/SP.J.1146.2010.00465
Citation:
Chu Yu-Zhi, Zheng Bao-Yu. A Cooperative Transmission Scheme Based on Amplify and Forward in Cognitive Radio Networks[J]. Journal of Electronics & Information Technology, 2011, 33(3): 509-514. doi: 10.3724/SP.J.1146.2010.00465
Chu Yu-Zhi, Zheng Bao-Yu. A Cooperative Transmission Scheme Based on Amplify and Forward in Cognitive Radio Networks[J]. Journal of Electronics & Information Technology, 2011, 33(3): 509-514. doi: 10.3724/SP.J.1146.2010.00465
Citation:
Chu Yu-Zhi, Zheng Bao-Yu. A Cooperative Transmission Scheme Based on Amplify and Forward in Cognitive Radio Networks[J]. Journal of Electronics & Information Technology, 2011, 33(3): 509-514. doi: 10.3724/SP.J.1146.2010.00465
Cognitive Radio Networks (CRNs) improve Secondary Users (SUs) transmission performance through cooperative transmission between SUs without interfering the regular transmissions of the Primary Users (PU). In this paper, a new cooperative transmission scheme is proposed based on AF (Amplify and Forward) protocol while PU and SUs coexist in the same CRN and each PU can be either active (ON) or inactive (OFF) in any given slot. When the licensed frequency is occupied by the PU, SU can opportunist use the relay to transmit signals. Analytical expression of the non-interference transmission durations is given. Non-cooperative and cooperative schemes derived show the effect of cooperative transmission on the non-interference transmission durations performance. Besides, numerical experiments are conducted to verify the effectiveness of the proposed cooperative schemes. The increase of non-interference transmission durations by cooperative transmission confirms the advantages of the new scheme.
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