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提出了一种应用在卫星导航系统中的干扰对消技术.通过理论推导,详细分析了干扰对消系统对宽带干扰抑制能力的极限值,揭示了带宽延时积与干扰对消比的内在关系,量化了幅度误差和相位误差对宽带干扰对消比的恶化程度.通过仿真和实验验证了理论分析的正确性.实验验证了双天线对消系统可使卫星导航接收机的抗干扰能力提高29 d B.
An interference canceling technique applied in satellite navigation system is proposed.According to theoretical derivation, the limit value of interference cancellation system against broadband interference suppression is analyzed in detail, and the inherent relationship between bandwidth delay product and interference cancellation ratio is revealed , Which quantifies the degree of deterioration of amplitude cancellation and phase error on the cancellation ratio of broadband interference.The validity of the theoretical analysis is verified by simulation and experiments.The experimental results show that the dual antenna cancellation system can improve the anti-jamming capability of satellite navigation receiver d B.