CAJ | 학술논문

随着电子科学技术的发展，各种无线设备和应用不断地加入现有的网络，造成宝贵的频谱资源日趋匮乏。频谱共享是目前能够解决该问题的一个有力工具，它也是认知雷达在未来战场应用中亟需解决的一个关键问题。为此，论文提出了一种用于授权用户和非授权用户频谱共享的协作通信机制。在该机制中，非授权用户通过功率控制、协作中继和线性编码来实现与授权用户共享频谱资源。同时，引入中断重发机制，即一旦中继节点不能解码授权用户和非授权用户数据，相应的源节点将重新发送数据一次，从而提高了数据传输的可靠性。最后，仿真实验验证了该机制的有效性。本文提出的频谱共享机制对认知雷达系统的通信系统研究具有重要的理论和实践意义。
수착전자과학기술적발전，각충무선설비화응용불단지가입현유적망락，조성보귀적빈보자원일추궤핍。빈보공향시목전능구해결해문제적일개유력공구，타야시인지뢰체재미래전장응용중극수해결적일개관건문제。위차，논문제출료일충용우수권용호화비수권용호빈보공향적협작통신궤제。재해궤제중，비수권용호통과공솔공제、협작중계화선성편마래실현여수권용호공향빈보자원。동시，인입중단중발궤제，즉일단중계절점불능해마수권용호화비수권용호수거，상응적원절점장중신발송수거일차，종이제고료수거전수적가고성。최후，방진실험험증료해궤제적유효성。본문제출적빈보공향궤제대인지뢰체계통적통신계통연구구유중요적이론화실천의의。
With the development of electronics technology, there will be more and more wireless devices and services in the networks, which would induce the problem of spectrum scarcity. Spectrum sharing is a powerful method to solve such problem, and it is also a key technology in cognitive radar. Thus, this paper proposes a novel cooperative communication scheme for spectrum sharing between licensed users and unlicensed users. The proposed scheme naturally integrates power control, cooperative relaying and linear coding techniques to achieve efficient spectrum sharing. Besides, the sources will retransmit the signals once the destination can not decode the sources’ signals correctly in the proposed scheme, which can improve the reliability of data transmissions. Finally, the effectiveness of this scheme is validated by extensive simulation studies. Overall, the proposed scheme can facilitate the design of cognitive radar systems.