哈尔滨工程大学学报
哈爾濱工程大學學報
합이빈공정대학학보
JOURNAL OF HARBIN ENGINEERING UNIVERSITY
2015年
8期
1147-1152
,共6页
SimpliciTI%协作频谱检测%频率捷变%认知无线电%抗干扰通信%隐藏终端
SimpliciTI%協作頻譜檢測%頻率捷變%認知無線電%抗榦擾通信%隱藏終耑
SimpliciTI%협작빈보검측%빈솔첩변%인지무선전%항간우통신%은장종단
SimpliciTI%cooperative spectrum sensing%frequency agility%cognitive radio%anti-jamming communica-tion%hidden terminal
针对目前SimpliciTI协议单点频谱检测存在的自干扰和隐藏终端问题，为了提高无线传感网络的抗干扰能力，根据协作频谱检测原理，提出了基于半投票规则的集中式协作频谱检测的协作频率捷变（ cooperative frequency agility， Co?FA）机制，并应用于SimpliciTI协议。该机制不仅发挥了协作频谱检测在减小多径、阴影效应及隐藏终端问题方面的优势，还能够解决传统FA机制的自干扰问题。实验测试表明此方法可以有效地解决原FA机制的自干扰问题，并且使SimpliciTI的频谱检测性能平均提升42％。
針對目前SimpliciTI協議單點頻譜檢測存在的自榦擾和隱藏終耑問題，為瞭提高無線傳感網絡的抗榦擾能力，根據協作頻譜檢測原理，提齣瞭基于半投票規則的集中式協作頻譜檢測的協作頻率捷變（ cooperative frequency agility， Co?FA）機製，併應用于SimpliciTI協議。該機製不僅髮揮瞭協作頻譜檢測在減小多徑、陰影效應及隱藏終耑問題方麵的優勢，還能夠解決傳統FA機製的自榦擾問題。實驗測試錶明此方法可以有效地解決原FA機製的自榦擾問題，併且使SimpliciTI的頻譜檢測性能平均提升42％。
침대목전SimpliciTI협의단점빈보검측존재적자간우화은장종단문제，위료제고무선전감망락적항간우능력，근거협작빈보검측원리，제출료기우반투표규칙적집중식협작빈보검측적협작빈솔첩변（ cooperative frequency agility， Co?FA）궤제，병응용우SimpliciTI협의。해궤제불부발휘료협작빈보검측재감소다경、음영효응급은장종단문제방면적우세，환능구해결전통FA궤제적자간우문제。실험측시표명차방법가이유효지해결원FA궤제적자간우문제，병차사SimpliciTI적빈보검측성능평균제승42％。
In this paper, a centralized cooperative frequency agility ( CoFA) based on the half?voting?rule coopera?tive spectrum sensing is proposed and applied in SimpliciTI protocol. SimpliciTI performs poorly in single node spectrum detection and there exist self?interference and hidden terminal problems. Therefore, CoFA is proposed to improve the anti?interference capability of wireless sensor networks. It has remarkable advantage in avoiding mul?tipath, shadow effect, hidden terminal problem, and solves the self?interference problem in traditional FA. Finally, the test showed that the method proposed could effectively solve the self?interference problem in former FA and in?creases 42% in average of the frequency sensing performance in SimpliciTI.
