FiveWhat is the difference between a GPS positioning device, an external antenna, and a built-in antenna? GPS and GSM are common outside, the two antennas are separated, a positioning of a communication, right? Then the external and built-in that good? Built in with no external signal stability?
Of course, the accuracy of the antenna is a good external antenna outside the search for the effect of the star is also a good built-in antenna is more compact and convenient, but the accuracy and positioning speed is not as good as the external antenna
The frequency of the antenna determines its different uses, and the gain determines the signal. Generally speaking, because the volume of the external relationship is better than the built-in. GPS and GSM signal frequency is different, so can not mix.
I know a GPS positioning software installed in the phone can be used to locate the GPS function, and very convenient, more convenient than the GPS locator, called smartlbs bit.
External antenna signal is relatively better. Built in antenna.GPS and GSM is not a thing at all, GPS is used for positioning, GSM is used for communication, there is a kind of AGPS can use mobile signal base station to locate.Where the signal is not good, an external antenna can be used for accurate positioning.
GPS is the English Global Positioning System (global positioning system). GPS began in 1958, a U.S. military project, put into use in 1964. 1970s, the United States Army and Navy jointly developed a new generation of satellite positioning system GPS. The main purpose is for the sea and air three major areas to provide real-time, all-weather and global navigation service, and for information gathering, nuclear monitoring and emergency communication etc. some military purposes, through the experimental study of more than 20 years, at a cost of $30 billion, by 1994, global coverage of 24 GPS satellites constellation has set up to 98% complete. In the mechanical field, GPS has another meaning: GPS (Geometrical Product Specifications). Another meaning is G/s (GB per second). GPS (Generalized Processor Sharing) generalized processor sharing, network service quality control in the terminology. External antenna signal is relatively better. Built in antenna.GPS and GSM is not a thing at all, GPS is used for positioning, GSM is used for communication, there is a kind of AGPS can use mobile signal base station to locate.Where the signal is not good, an external antenna can be used for accurate positioning.
