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认知超宽带无线电(CUWBR)系统实现的关键问题是当CUWBR感知到频谱空洞时,怎样设计合适的发送波形和频谱整形使其对合法用户造成的干扰最小。针对这一问题,文中简要介绍了CUWBR系统中基于检测与躲避的抗干扰原理,综述了CUWBR抗干扰发送波形设计和频谱整形技术的研究状况和最新进展,并对未来的发展动态进行了分析。解决这一问题能够提高现有频谱的利用率,缓和频谱供需矛盾,对UWB的实用化和CR的实现有积极的推动意义。
The key issue for the realization of Cognitive Ultra-Wideband Radio (CUWBR) systems is how to design suitable transmit waveforms and spectral shaping to minimize interference to legitimate users when CUWBR perceives spectral holes. In order to solve this problem, this paper briefly introduces the anti-jamming principle based on detection and avoidance in CUWBR system, summarizes the research status and recent development of CUWBR anti-jamming transmit waveform design and spectrum shaping technology, and analyzes the future development. Solving this problem can improve the utilization rate of the existing spectrum and ease the contradiction between the supply and demand of the spectrum, which has a positive impetus to the practicalization of UWB and the realization of CR.