GPS is expensive because it is a very slow communication channel—you need to communicate with three or four satellites for an extended duration at 50 bits per second Mobile devices such as
The interface between the GSM antenna and the GPS antenna varies. With regards to the GPS antenna, its interface should be compatible with the GPS Bluetooth satellite module or the external antenna interface of the navigator. Typically, the GSM hand antenna is a car mobile phone hands-free system through Bluetooth.
1. Mobile phones do not rely on GNSS (GPS is not the only satellite positioning system) alone. The cell towers provide corrections and extra information. Regardless, GNSS systems rarely work indoors. Also note that radiation from other electronics can easily mask the operation - circuit layout, antenna positioning all have a part to play. SIM808 GSM : Supports Quad-band 850/900/1800/1900MHz, compatible with all 2G networks all around the world. Inner MT3337 GPS receiver, -165dBm precision, control on a same serial port. Earphone/ microphone outputs on a card or external 32-ohm speaker + supports voice calls with an electret microphone. Sending and receiving SMS. UNcBr.