对GPS接收机的一种新宽带压制干扰样式分析

针对单频连续波干扰极易通过频域滤波加以抑制，而宽带连续阻塞式干扰又存在干扰效率低下的问题，提出脉冲连续波这种新的宽带梳状拦阻式干扰样式。根据C/A码、P(Y)码和M码信号功率谱特点分别设置脉冲连续波的干扰频率覆盖范围。以码跟踪误差作为干扰效果评估指标，对不同干扰环境下采用窄带非相干延迟锁定环的GPS接收机码跟踪性能进行仿真分析。仿真结果表明:脉冲连续波干扰对不同伪随机噪声码(PRN)编号和副载波调制相位下的C/A码和M码信号影响是不同的，在相同干信比(JSR)条件下，脉冲连续波的干扰效果要优于宽带高斯噪声和匹配谱干扰。

Analysis of a New Wideband Blanket Jamming Type to GPS Receiver

Aiming at the problem that a Continuous Wave (CW) is easy to be suppressed by the frequency domain filtering and the efficiency of a broadband continuous blanket jamming is low, this paper presents a new broadband comb spectrum jamming type which is called single pulse CW. The jamming frequency domain range of single pulse CW is set respectively according to the power spectral density characteristic of C/A code, P(Y) code and M code signal. Taking code tracking error as the evaluation index of jamming effect, the GPS receiver code tracking performance of using a narrowband non-coherent delay lock loop is simulated and analyzed under different jamming circumstance. The simulation results show that the influence of single pulse CW jamming to C/A code and M code with the different Pseudo Random Noise Code (PRN) and phase of modulating sub-carrier are different, under the same Jamming-to-Signal Ratio (JSR) condition, the jamming effect of single pulse CW is better than the broadband Gaussian noise and matched spectrum.