###### Abstract  
Satellite navigation spoofing technology has become a hotspot of interference technology research because of its significant threat and high concealment. In a spoofing scenario, suppressive interference is typically used to ensure that the target receiver sensor is in the unlocked and reacquisition state, and then spoofing is implemented. This method has a high feasibility, and the power of the spoofing signal affects the concealment and efficiency of spoofing. Currently, there is limited research involving the GNSS spoofing signal power control. Moreover, there is no systematic complete power control scheme, most of which is limited to qualitative or simulation, and the actual application effect is still unclear. Therefore, a new GNSS spoofing signal power control algorithm under the power constraints of the receiver sensor in the acquisition phase and the subsequent control is proposed. The experimental platform is designed to prove that compared with the conventional spoofing signal high power control algorithm, the new GNSS spoofing signal power control algorithm shortens Doppler frequency fluctuation time by 72.2% and reduces the range by 75.9%. The carrier-to-noise ratio of the received signal is less than the threshold of the receiver sensor, and the range of three-dimensional coordinates of Earth-Centered, Earth-Fixed (ECEF) is significantly reduced during the spoofing signal taking over receiver sensor, this shows that the new design of the GNSS spoofing signal power control algorithm can make spoofing behavior more hidden, and it will make it more difficult for the target receiver sensor to detect spoofing behavior. The designed algorithm can take over the receiver sensor stealthily with the help of suppressing interference and then pull the bias positioning results, which has good feasibility and effectiveness. GNSS spoofing; receiver sensors; spoofing signal; power control algorithm; signal acquisition 202  
important problem to be studied. When a receiver is in the acquisition phase, the spoofing signal can effectively spoof the receiver by generating multiple false correlation peaks and increasing the noise floor [4]. During the signal acquisition phase, the receiver searches within the two-dimensional space of the Doppler shift and the code phase, and calculates the signal parameters at the highest correlation peak above the priori decision threshold [5]. A spoofing signal produces a higher power correlation peak in the search domain by generating a higher power signal. At this time, a receiver is easily locked at the peak of the spoofing signal, thereby affecting the positioning result of the receiver [6]. In an actual scenario, it is better to use the method of suppressing interference to make receiver lose lock, and then implement the method of spoofing [7]. When the receiver is in cold start or loss lock and reacquisition (loss of lock caused by natural environment or suppressed interference), a spoofing signal present in the environment may be and acquired by the receiver. The method of entering the receiver through the acquisition phase is simple and effective. However, for a receiver with a certain spoofing detection capability, after it is successfully pulled into the spoofing signal, to effectively implement persistent spoofing, it is necessary to control the power without being noticed by the receiver. For example, in a normal environment, the noise floor of the receiver is relatively stable; however, when a spoofing signal invades, there is a cross-correlation interference between the spoofing signal and authentic signal, and the noise floor is raised. When the noise floor is raised to a certain extent, authentic signals may be submerged in the noise [8]. If the power of spoofing signal is extremely high, it is easy for the target receiver to detect an abnormality and other navigation devices are used, and effective spoofing cannot be achieved [4].