The device that simulates real GPS satellite signals is called GPS signal generator. It is usually used as an analog signal source for the production and testing of satellite navigation equipment. This paper mainly introduces the application and function characteristics of GPS generator in satellite navigation products.

Satellite navigation receiver plays a very important role in aerospace and other fields. For receiver users, especially high dynamic users such as military aircraft, missiles and spacecraft, it is very necessary to have GPS signal generator with test receiver performance. The development of GPS generator can also provide technical support and key technical guarantee for pre study of satellite Signal Jammer. 。

In any comprehensive test, precise control of test conditions is essential. The precise adjustment of design or system parameters also requires a small fine adjustment of the precise control of test conditions.

The reason why we need to use the simulator is that when we use the real satellite signal test method, we have almost nothing to control. In addition to testing the physical location of the antenna, other conditions are not affected by humans. You can't turn the clock back, disable the atmosphere, adjust satellite signals, errors, data, tracks, etc. All this is the factor that many tests need to be completely controlled.

In the course of dynamic object motion, the GPS signal can be accurately simulated by various satellite signals received by the receiver. It can not only provide signal source, but also simulate the attitude signal and differential signal.This provides a simulation environment for the development and testing of receivers, especially for high dynamic receivers, and can also be used for system super simulation experiments.

The SYN5203 GPS signal generator has built-in static and dynamic trajectories that can run directly, and of course support real-time recording. The recording function is to receive the satellite signal and locate it through the receiver, then carry the signal generator to the scene to record the real time track. After recording, click the file to save and save it and run the track directly. The satellite navigation equipment receives the signals emitted by the GPS signal simulator, and works accordingly according to the recording of the GPS signal simulator and the current track and location information.

The GPS signal generator is built with a temperature compensated crystal oscillator. The positioning accuracy of signal accuracy is less than 5 meters. It can be externally connected with a constant temperature crystal oscillator. When the constant temperature crystal oscillator is used, the positioning accuracy is less than 1 meters, and the speed accuracy of the signal accuracy is less than 0.1m/s. When the track is recorded, the vehicle antenna with external SMA interface is required, the positioning accuracy is 2.5 m CEP, and the speed accuracy is 0.1m/s.

The SYN5203 GPS signal generator can output all the statements of the receiver. In the project environment, the receiver of the client can not distinguish the GPS signal from real or generator.

The signal generator is limited to scientific research, technical exchange, equipment maintenance, and shall not be used for any commercial profit-making activities or illegal uses.