对GPS接收机带限高斯噪声压制干扰的干扰带宽选择分析  

Analysis of Band-limited Gaussian Noise Blanket Jamming Bandwidth Choosing to GPS Receiver

作　　者：毛虎[1] 吴德伟[1] 卢虎[1] 

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《弹箭与制导学报》2015年第1期118-123,共6页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(61174194)资助

摘　　要：针对带限高斯噪声干扰效率低下的问题,以GPS接收机码跟踪误差和星历误码率作为干扰效果评估准则,在分析GPS C/A码、P(Y)码和M码信号功率谱特点的基础上,通过对干扰带宽影响码跟踪和星历解调过程进行理论推导,定性的判断出最佳干扰带宽的存在。定量的仿真分析结果表明:对于C/A码信号,当干信比较小时,要充分考虑到误码率的影响,将造成码跟踪误差最大的干扰带宽减小一些,作为其最佳干扰带宽;而对于P(Y)码和M码信号,应选择造成码跟踪误差最大的干扰带宽,作为其最佳干扰带宽。Aim at the problem of low efficiency of band-limited Gaussian noise jamming,using code tracking error and ephemeris bit error rate of GPS receiver as the jamming effect evaluation index,on the basis of analysis characteristics of GPS C / A code,P（ Y） code and M code signal power spectral density,to carry on the theoretical derivation about jamming bandwidth influence code tracking and ephemeris demodulation process,the existence of optimal jamming bandwidth is judged qualitative. The quantitative simulation results show that when the JSR is small,the bit error rate influence should be fully considered,the jamming bandwidth which causes the biggest code tracking error should reduce a little as the best jamming bandwidth for C / A code signal,the best jamming bandwidth should choose the jamming bandwidth which causes the biggest code tracking error for the P（ Y） code and M code signal.

关 键 词：GPS扩频码 码跟踪误差 误码率 干信比 干扰带宽 

分 类 号：TN967.1[电子电信—信号与信息处理] TN972.2[电子电信—信息与通信工程]