GNSS receivers can be categorized according to the use, working principle, receiving frequency and so on.

1、 Classified according to the use of the receiver

1) Navigation receiver: It is mainly used for the navigation of moving carriers, and can give the position and speed of the carriers in real time. Generally, it adopts C/A code pseudo-distance measurement, with low accuracy of single-point real-time positioning, generally about 10 meters. The receiver is cheap and widely used.

2) Ground measurement receiver: mainly used for precision ground measurement and precision engineering measurement. The instrument mainly adopts the carrier phase observation value for relative positioning, with high positioning accuracy. The structure of the instrument is complicated and the price is expensive.

3) Timing receiver: It mainly adopts the high-precision time standard provided by GNSS satellites for timing, and is commonly used for time synchronization of astronomical observatory, wireless communication and electric power network.

2, according to the receiver's carrier frequency classification

1) Single-frequency receiver: It only receives L1 carrier signal and measures the carrier phase observation value for positioning. Single-frequency receiver is only applicable to the precise positioning of short baselines, because it can not effectively eliminate the influence of ionospheric delay.

2) Dual-frequency receiver: L1 can receive and L2 carrier signal at the same time. Different dual-frequency delay can eliminate the delay of the ionosphere on the electromagnetic wave signal, so dual-frequency receiver can be used for thousands of kilometers of precise positioning.

3、 Classified according to the number of receiver channels

The GNSS receiver function receives multiple GNSS satellite signals simultaneously. In order to separate the different satellite signals received and realize the tracking, processing and measurement of satellite signals, the equipment with this function is called antenna signal channel. According to the type of channel of the receiver, it can be divided into multi-channel receiver, sequential through-channel receiver and multi-channel multi-channel receiver.

4, according to the receiver's working principle classification

1) Code correlation receiver: Utilizes code correlation technique to obtain pseudo-range observations.

2) Square Receiver: Remove the modulating signal and recover the complete carrier signal by using the square of carrier signal technique. The phase difference between the carrier signal generated by the receiver and the received carrier signal is measured by a phasor meter, and the pseudo-range observation is measured.

3) Hybrid receiver: Combining the advantages of the above two receivers, this instrument can not only obtain the code phase pseudorange, but also the carrier phase observation.

Interferometric receiver: Taking the GNSS satellite as the radio source, the interferometric method is used to measure the distance between two stations.

Ltd. specializes in high-precision GNSS modules and wireless communication products, technology development and application promotion service providers, relying on the wireless communication technology in the field of R & D and promotion of experience, JUNODA set up a team with a wealth of experience in hardware and software development technology, aimed at domestic and foreign OEM / ODM customers and system integrators to provide high-quality, high-performance wireless modules and applications! We aim to provide high-quality, high-performance wireless modules and application programs to OEM/ODM customers and system integrators at home and abroad, and create long-term value for customers!

The company mainly provides integrated antenna module, dual-frequency high-precision module, single-frequency high-precision module, thousand-seeking high-precision module, Zhongke micro-positioning module, U-BLOX positioning module, SICOM communication module, inertial navigation DR module, UWM GNSS module, RTK differential module, 4G communication module and high-precision antenna, etc., the products are sold well in Beijing, Shanghai, Shenzhen, Guangdong, Jiangsu, Zhejiang, Sichuan, Hunan and other parts of the country. Our GNSS modules are widely used in many application fields, such as drones, vehicle security monitoring and dispatching, automatic bus stop announcement, DVR, car DVD navigation, GPS electronic dog, synchronized timing, high-altitude balloon monitoring, engineering machinery, industrial automation, etc. In the field of wireless communication products, the company is closely involved in the field of wireless communication, such as RTK differential module, 4G communication module and high-precision antenna.

In the field of wireless communication products, the company follows the latest development of international communication technology, introduces and acts as an agent for wireless communication modules that meet the market demand, and the products have a comprehensive layout from 2G, 3G, 4G, and are widely used in financial electronic payment, vehicle remote control, remote advertising information, repeater monitoring, mobile Internet terminals, smart home, remote medical care, network testing, enterprise information management, anti-theft alarm, Remote video transmission, intelligent meter reading, mobile computing, network navigation, voice phone, wireless gateway and other fields. Focused areas include video surveillance, network optimization, routers, POS and other M2M industry applications.

If you need to consult, please contact online customer service!