The satellite signal simulator is a highly accurate signal launcher. The emitted signal can be used by some special satellites as navigation information, creating good conditions for the development and data test of the navigation receiver, and is an essential part in the design and development process of the navigation receiver.

According to the number of satellite channels that can be simulated by the satellite navigation signal simulator, the simulator can be divided into two types: single channel simulator and multi-channel simulator. The GPS satellite signal simulator is composed of GPS signal launcher, computer and signal receiving device. The GPS signal generator is composed of a variety of hardware. The signal generator can generate a variety of channel signals at the same time. The signal receiving device is the core part of the GPS signal generator, and all kinds of signals used in the GPS signal generator are compiled from the simulation software.

GNSS satellite signal simulator can be divided into 2 main categories:

Software based mode: in this mode of operation, all information and signals related to navigation are obtained through computer processing, including data and signals of various models are processed through computer software, and stored in related equipment for preservation.

Based on the combination of software and hardware mode: in this mode of operation, computer software is mainly responsible for collating and computing related information and signals, and then uses the parameter control hardware which is consistent with the signal to analyze the information processed and launch the satellite signal.

The SYN5203 GPS signal simulator is a low-cost satellite navigation GNSS satellite signal simulator designed and developed by Xi'an synchronous Electronic Technology Co., Ltd., simulating the navigation signals of GPS satellite navigation and positioning system, supporting the RF signal output of GPS L1 frequency points, supporting real-time ephemeris and external ephemeris parameter input, supporting various trajectory outputs of different time lengths, meeting the test requirements of all kinds of GPS navigation receiving and receiving terminals, and replacing the foreign high GPS simulator.

In use, SYN5203 has standard 2U box and small module for different users and different scenarios. Real time GPS, Beidou signal simulation, flexible generation and editing of scene files for static and mobile receiver testing. The small simulator has USB interface, communicates with the computer through the USB interface, and quickly sets up various parameters and produces track through the computer host computer software. The chassis front panel is equipped with touch screen and keypad, which can work independently without external computers.

A SYN5203 satellite signal simulator can theoretically connect all the GPS receivers in the range he sends. A plurality of tracks or fixed points can be pre arranged, with a single and infinite circulation function; the track switching is convenient, and the track preset number is not limited, and detailed data such as velocity and acceleration of the track can be set. Regarding the GPS simulator's trajectory duration, one minute is 300M, the 32g standard version supports 100 minutes duration, 64g supports 200 minutes, and one analogy allows users to purchase larger SD cards themselves.

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