基于全球卫星定位系统(GPS)接收天线抗干扰研究.doc

 本科生毕业论文（设计） 题目： 基于全球卫星定位系统（GPS） 接收天线的抗干扰研究 系 部 学科门类 工 科 专 业 电子信息工程 学 号 姓 名 指导教师 年 月 日 基于全球卫星定位系统（GPS）接收天线的抗干扰研究 摘 要 全球定位系统(GPS, global positioning system)是以人造卫星作为导航台的星基无线电导航系统，作为通用的定位系统相较其它导航体系具有无可比拟的优势，能够全时段，全天候地为地球的任何一个地方提供高质量的位置、速度和时间信息。由于到达GPS接收机的信号相当微弱，加上信道环境中的复杂电磁干扰，采取有效的措施消除干扰信号，可以有助于提高GPS接收系统的抗干扰能力，进而提升整个GPS导航系统的可靠性和稳定性。 未来战争必将是高科技的“数字化战争”，而先进的导航定位技术是“数字化战争”的重要保证。作为一种通用的导航定位系统，GPS具有许多其它导航设备无可比拟的优越性，比如全天候、高精度、自动化、高效率等显著特点。但其自身的一些缺点也使GPS可能受到潜在的攻击。因此不仅要研究GPS的相关技术，而且要重点研究先进的GPS抗干扰设备，以适应现代化信息战的需要。为此本文对GPS的抗干扰问题展开了深入研究。 卫星导航系统能提供精密的三维坐标，速度和时间。但目前的卫星导航信号湮没于噪声中且易被干扰所以抗干扰技术是实现卫星导航定位功能的关键。在众多抗干扰技术中，自适应调零天线的抗干扰性能是最好的，而且其性价比也是最佳的。本文对自适应调零天线中的自适应算法进行了比较，推导了功率倒置算法，并对自适应调零天线抗干扰性能进行了模拟仿真。 ABSTRACT As a general navigation device, global positioning system (GPS) is satellite-based radio navigation system and has many incomparable superiority, comparing to other navigation systems, with man-made satellite serving as its navigation station. GPS is able to provide any corner on the earth with high-class information of position, speed and time in despite of weather. Due to the weak power of arriving GPS signal and complicated electromagnetic interfere in propagation channel, effective measures must be taken to eliminate interference signals in order to advance the GPS receivers capacity of resisting disturbance, through which the reliability and stability of navigation. As a universal navigation and position system，GPS has many advantages superior to other navigation and position equipment，such as its all weather characteristic, high degree of accuracy, automation and high efficiency. But some of its disadvantages make GPS receiver attacked possibly by some potential factors. As a result, not only GPS interrelated technology Lout also GPS anti–jamming technology need to be studied in order to meet the needs of modern information battle. Ther