现代电信科技
現代電信科技
현대전신과기
MODERN SCIENCE & TECHNOLOGY OF TELECOMMUNICATIONS
2012年
9期
47-52,57
,共7页
认知无线电%无线区域网%数字电视%干扰规避
認知無線電%無線區域網%數字電視%榦擾規避
인지무선전%무선구역망%수자전시%간우규피
Cognitive Radio%WRAN%DTV%Inter- fcrenee Avoiding
虽然新技术的研发可以提升频谱利用率,但是很多授权频段的频谱利用率却非常低,尤其是信号传播特性好的低频段。认知无线电技术是一种智能的频谱共享技术,可以有效地提高授权频段利用率。文章介绍了认知无线电的关键技术和IEEE 802.22 WRAN标准,通过具体分析无线区域网（WRAN）对数字电视（DTV）接收机造成的干扰,建立了相应的场景模型,提出了有效的干扰规避方案。
雖然新技術的研髮可以提升頻譜利用率,但是很多授權頻段的頻譜利用率卻非常低,尤其是信號傳播特性好的低頻段。認知無線電技術是一種智能的頻譜共享技術,可以有效地提高授權頻段利用率。文章介紹瞭認知無線電的關鍵技術和IEEE 802.22 WRAN標準,通過具體分析無線區域網（WRAN）對數字電視（DTV）接收機造成的榦擾,建立瞭相應的場景模型,提齣瞭有效的榦擾規避方案。
수연신기술적연발가이제승빈보이용솔,단시흔다수권빈단적빈보이용솔각비상저,우기시신호전파특성호적저빈단。인지무선전기술시일충지능적빈보공향기술,가이유효지제고수권빈단이용솔。문장개소료인지무선전적관건기술화IEEE 802.22 WRAN표준,통과구체분석무선구역망（WRAN）대수자전시（DTV）접수궤조성적간우,건립료상응적장경모형,제출료유효적간우규피방안。
Although the new technologies can improve the efficiency of the spectrum, the utilization of many licensed spectrums is very low, especially the low frequency with better propagation characteristic. The cognitive radio is a smart spectrumsharing technology, which can increase the spectnlm utilization of the licensed spectrum effectively. This paper introduces the key technologies of cognitive radio and the IEEE 802.22 WRAN standard which is being developed currently, analyzes the interference from the WRAN to digital television receiver, models the scenes, and proposes an interference avoiding scheme.
