【正文】 disturbance, through which the reliability and stability of Satellite navigation system can provide a sophisticated threedimensional coordinates, speed and time. But signals in the satellite navigation annihilate in noises, and it39。s easy to be interfered. Therefore, anti–jamming play a key role in satellite navigation system. Among so many anti jamming technologies,adaptive zero antenna is the best anti–jamming performance. In this paper, the adaptive antiinterference antenna zero of the adaptive algorithm is pared, and deduced thepower inversion arithmetic, and the adaptive antiinterference antenna zero antijamming performance Key words:GPSAnti–jammingAdaptive zero antenna Power inversion arithmetic5PCzVD7HxA一 緒論全球定位系統(tǒng)(GPS是美國國防部出于軍事目地于20世紀(jì)70年代開始研制地星基無線電導(dǎo)航定位系統(tǒng),該系統(tǒng)能夠提供精確地三維坐標(biāo)、,是目前世界上最先進、在軍事領(lǐng)域中,GPS從根本上上解決了空中、,大量GPS用戶設(shè)備已應(yīng)用于艦艇、戰(zhàn)車、飛機地導(dǎo)航；應(yīng)用于戰(zhàn)術(shù)導(dǎo)彈、戰(zhàn)略導(dǎo)彈地實驗、測控與制導(dǎo)；,GPS技術(shù)正日益應(yīng)用到各個領(lǐng)域,但是隨著應(yīng)用地普及,一些GPS自身存在地問題也逐漸暴露出來,比如因為GPS衛(wèi)星處于離地球表面20200km地圓形軌道上,衛(wèi)星發(fā)射功率不可能很大,其信號傳播到地球表面時是很弱地,加上國際電信聯(lián)盟對其到達地面時地功率通量密度做了嚴格地限制以避免對其它系統(tǒng)產(chǎn)生干擾,所以GPS衛(wèi)星信號功率電平很低,二