Analysis of GPS Antenna Principle_truck tracking webfleet solutions_Huizhou Cantrack Technology Co., Ltd.

   At present, the GPS receiver circuit in practical application is generally composed of four parts: antenna unit, radio frequency unit, communication unit and calculation unit. Based on the analysi

truck tracking webfleet solutions

Home > News > Other information > truck tracking webfleet solutions > Analysis of GPS Antenna Principle

Company News

Industry News

Analysis of GPS Antenna Principle

source:truck tracking webfleet solutions release time:2022-08-18 Hits:     Popular:realtime gps tracker online

  

  At present, the GPS receiver circuit in practical application is generally composed of four parts: antenna unit, radio frequency unit, communication unit and calculation unit. Based on the analysis of the composition of GPS satellite signals, this paper gives the principle and application of the radio frequency front-end GP2010.

  1. Composition of GPS satellite signals

  The GPS satellite signal is synthesized by typical code division multiple access (CDMA) modulation technology, and its complete signal mainly includes three components: carrier, pseudo-random code and data code. The signal carrier is in the L-band, and the center frequencies of the two carriers are denoted as L1 and L2, respectively. The satellite signal reference clock frequency f0 is 10.23MHz, and the center frequency of the signal carrier L1 is 154 times the frequency of f0, namely:

  fL1=154×f0=1575.42MHz (1)

  Its wavelength λ1=19.03cm; the center frequency of the signal carrier L2 is 120 times the frequency of f0, namely:

  fL2=120×f0=1227.60MHz (2)

  2. Analysis of GPS Antenna Principle

  Its wavelength λ2=24.42cm. The frequency difference between the two carriers is 347.82MHz, which is about 28.3% of L2. The carrier frequency is selected in this way to measure or eliminate the propagation delay error caused by the ionospheric effect when the navigation signal propagates from the GPS satellite to the receiver. Pseudo-random noise code (PRN), that is, ranging code, mainly includes two kinds of fine ranging code (P code) and coarse ranging code (C/A code). The code rate of the P code is 10.23MHz, and the code rate of the C/A code is 1.023MHz. The data code is the navigation and positioning data sent by the GPS satellite to the user receiver in binary form. It is also called the navigation message or D code. It mainly includes satellite calendar, satellite clock correction, ionospheric delay correction, working status information, and C/A code conversion. To capture the information of the P code and the general ephemeris of all satellites; the total message consists of 1500 bits, divided into 5 subframes, each subframe transmits 10 words within 6s, each word 30 bits, a total of 300 bits, so the data The baud rate of the code is 50bps.


Read recommendations:

car gps tracker supplier

4G GPS Tracker for vehicles wholesaler

YG119- Hunting Dog GPS tracker

The Development History of GPS in the United States.4G GPS Tracker for vehicles manufacture

GPS application knowledge

Last article:Handheld GPS Device

Next article:GPS helps you avoid electronic eyes

Related Information

car gps tracker manufacture

2023-04-23

portable gps tracker Vendor

2023-04-23

fleet gps tracking Production

2023-04-23

obd-II port gps tracker

2023-03-16

pet gps tracker cat Factory

2023-03-16

GPS Tracking Manufacturing

2023-04-23

rastreadores gps

2023-03-16

cat gps tracker custom

2023-04-11

Asset GPS Tracker

2023-03-16

Gps speed limiter wholesaler

2023-04-23

G900LM J16-4G Car GPS Tracker

2025-03-25

personal gps tracker Production

2022-09-06

P901 4G ID Card GPS Tracker Smart Walkie-talkie

2025-07-11

TK100 (GT06) Vehicle Tracker

2022-06-20

G07L 4G GPS Tracker

2022-09-06

Vehicle GPS positioning management system

2022-11-04

UUGPS positioning system

2022-09-19

What is the function of gps tracker.mileage tracking webfleet solutions

2023-03-13

Manufacturer introduces in detail the component of the car positioner.simple gps tracking wholesale

2023-06-08

Simple introduction of GPS control part.obd2 gps tracker verizon wholesale

2023-05-11

Comprehensive management of GPS satellite positioning and driver smart card for business and officia

2023-07-07

Why does China's Beidou satellite still use GPS positioning system.gps tracker for trailer Factory

2023-09-12

GPS module performance

2023-02-03

Wiring and installation method for Beidou/GPS satellite positioning and driving recorder.fleet gps t

2023-09-19

The difference between mobile GPS positioning and car GPS positioning.gps tracker online wholesaler

2023-06-20

GPS maintenance.cat gps tracker manufacture

2023-08-12

GPS tracker brings boon to bird conservation

2022-09-17

The concept of static drift of the car GPS positioner and cause.plug & play Obd gps tracker manu

2023-03-25

How to use GPS car tracker.realtime gps tracker online wholesale

2023-04-15

Micro Tracking Locator

2022-09-21

Related Articles

How to solve the problem of inaccurate car GPS locators?

    Firstly, let's take a look at why GPS locators are inaccurate and have large errors.  GPS positioning accuracy, generally within 10 meters if obtaining Beidou or GPS signals; If it is a signal...

2024-10-09
Know more >

GPS Differential Positioning Technology

    GPS differential positioning technology is an important method to improve the positioning accuracy of the Global Positioning System (GPS).  In traditional GPS positioning, satellite signals are af...

2024-09-29
Know more >

mini gps tracker

  Vehicle GPS Navigation System  Vehicle mounted GPS navigation system is an indispensable and important device in modern automobiles, providing drivers with convenient and accurate navigation service...

2024-09-28
Know more >

Handheld GPS positioning device

    Handheld GPS positioning device is a portable and practical positioning tool widely used in outdoor exploration, geological exploration, forestry investigation and other fields.  Handheld GPS posi...

2024-09-27
Know more >

High precision GPS locator

    In modern society, high-precision GPS locators play a crucial role. It has brought many conveniences to people's lives and work with its excellent positioning accuracy and reliable performance...

2024-09-26
Know more >

Real time GPS tracker

    Real time GPS tracker is an advanced technology device that can track target objects in real-time at any time and any place, bringing great convenience to people's lives and work.  The core fu...

2024-09-25
Know more >
Get a Quick Quote WhatsApp