With the development of satellite navigation industry, the application fields of satellite navigation products such as GPS have expanded, and there are more and more kinds of products. The satellite signal simulator can be widely applied to research, production and so on in institutions, research institutes, the development and production of receivers, and the manufacturers of satellite navigation. In addition, the satellite signal simulator can also serve as a third party inspection platform for satellite navigation receivers, providing third party detection reports and guiding consumers to purchase satellite navigation products.

The GPS satellite signal simulator is used to simulate the GPS satellite signal received by the GPS navigation receiver antenna. It can provide a variety of test scenarios for the receiver test, such as static fixed point scene, dynamic sports car scene, and high dynamic scene. The test results can fully reflect the positioning accuracy, capture sensitivity, tracking sensitivity, loss of lock recharge time and anti-jamming ability of the receiver. Indicators.

The motion trajectory of GPS receiver varies with different carriers. According to the possible application scope, the types of receiver carriers can be roughly divided into the following categories: satellites (spacecraft), launch vehicles (missiles), flights, ships and vehicles. For each type of receiver carrier, it is necessary to describe its motion state accurately. The motion model needs to consider a lot of parameters. However, for the simulator, the motion model can only reflect the characteristics of the target movement without considering it very accurately. For the common form of motion, the user only needs to select the corresponding carrier type and input some characteristic parameters, and the simulator can automatically generate. The trajectory of the carrier.

In the process of developing and debugging some special systems, testing the performance and targets of the developed objects is an important step. In this process, using the simulator to simulate the target signal has the advantages of repeatability, high flexibility and low cost compared with the actual outfield measurement. The general simulator system consists of three functional modules: data product module, signal playback module and control module.

In practical applications, the receiver is unable to distinguish the signals and real signals provided by the GPS simulator. All statements received by the receiver can be output. However, the equipment is limited to scientific research, technical exchange, equipment maintenance, and shall not be used for any commercial profit-making activities or illegal purposes, otherwise the consequences will be conceited. This device supports ephemeris input. It is widely used in all aspects of R & D, development, production and testing of equipment, and can complete positioning accuracy test, speed accuracy test, channel delay test, conformance test and ranging accuracy test.

The technical specifications of the SYN5203 satellite signal simulator indicate that the coverage range is 10 thousand square meters, and the radius is within 100 meters. It can connect all GPS receivers in the range he sends. If you need to narrow the analog GPS signal radiation range and prevent the signal intensity from being too large to interfere with other peripheral devices, it is recommended that direct connection and direct connection signal be relatively weak, and signal attenuators can be added to the simulator output interface.

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