source:Industry News release time:2023-04-21 Hits: Popular:realtime gps tracker online
In the absence of noise interference, comprehensive considerations such as ranging accuracy, signal bandwidth, required power, and different satellite recognition, the global positioning system uses pseudo -random code ranging technology. The pseudo -random code is also called a pseudo -noise code. It is a binary sequence that can be determined and can be reused and replicated, and has random statistical characteristics. In the occasion of deep space communication, the use of pseudo -random coding signals can achieve low signal -to -noise ratio, which greatly improves the reliability of communication, and can realize the code distribution of multiple address communication. In addition, the use of pseudo -random coding signals can achieve high -performance confidential communication. These characteristics are in line with the technical requirements of the GPS system.
According to the general result of the signal detection theory, the best receiver of the ranging is a related receiver under white noise conditions with a uniform power spectrum. This receiving method is to use the copy signal of the transmitting signal (referred to as a local signal) and the receiving signal and the sum of the noise of the noise, and then determine the distance of the target by measuring the position of the maximum value of the relevant function. From the perspective of related receiving methods, the ranging signal is required to have the self -related characteristics similar to white noise. Pseudo -random code ranging technology is the manifestation of this idea.
The transmission of signal transmission with a pseudo -random code needs to detect the maximum value of the related output. This can only be detected by moving the local code by code. Considering that the detection is performed after the integration is performed, the integration time should not be too short, so it takes a certain time to detect the maximum related output, that is, it takes a certain capture time. In the case of not knowing the distance to be tested and the difference in the standing clock, the longer the code, the longer the required capture time. In order to shorten the capture time, the GPS satellite also broadcasts a short code, namely C/A code, also known as rental code. Because the C/A code uses two Golder codes composed of the same code sequence with good interdependence characteristics, which keeps synchronized with the P code. Therefore, after capturing the C/A code, the P code can be easily captured.
Read recommendations:
GF70L-Solar Magnetic Asset GPS Tracker
Compared with the difference between Beidou positioning and GPS positioning.cat gps tracker Manufact
Last article:GPS development background.GPS Tracker for vehicles manufacturer
Next article:GPS receiver classification.realtime gps tracker online distributors
Related Information
car gps tracker wholesale
2023-04-23gps tracker for kids
2023-04-11vehicle gps tracker Factory
2023-04-23mini gps tracker Processing
2023-04-23realtime gps tracker online
2023-03-16OBD GPS Tracker custom
2023-04-11gps tracker with magnet Vendor
2023-03-16fleet gps trackers Processing
2023-04-23gps tracker for bike
2023-03-16simple gps tracking manufacturer
2023-04-23G09L -6 inch Tail light tracker
2022-06-20G183 serials -JOBD GPS Tracker
2022-09-06G200(L) -Magnet GPS Tracker
2022-06-20TK08AL- RFID Car GPS Tracker
2023-10-07VSL100 GPS Speed Limiter, Speed Governor
2022-06-19Geodetic GPS
2022-07-26The fundamental function of GPS positioner.mileage tracking webfleet solutions
2023-03-21GPS module
2022-10-19What are the functions of breeding solar GPS positioning
2023-02-23What is the GPS program of Gully?
2023-02-11Is there really a GPS positioner with a free card?gps tracker für auto webfleet solutions
2023-03-08The Development of GPS in the New Century
2022-09-24Beiqi Foton independently researches and develops the Internet of Vehicles system, Beidou and GPS du
2022-08-11Which is the best use of GPS positioning tracker for the loss of the elderly
2023-02-17GPS smart bus stop sign
2022-09-05Simulator test GPS
2022-10-10Causes of GPS Positioning Drift
2022-09-20Main Errors in GPS Positioning and Their Elimination Algorithm
2022-12-10Several Important Factors of Vehicle GPS Satellite navigation.personal gps tracker supplier
2023-06-16Introduction to GPS Platform
2022-11-09