With the rapid development of GPS (Global Positioning System) techniques, GPS gets wider application in many fields. GPS has features such as high precision, global coverage, convenience, high quality, and low cost. Recently, the use of GPS extends speedily from military to civilian applications such as automobile navigation systems which combine the GPS system, e-map, and wireless network. GPS is getting popular, and the market for GPS techniques is extending continuously.
UARTs provide serial asynchronous receive data synchronization, parallel-to-serial and serial-to-parallel data conversion for both the transmitter and receiver sections. These functions are necessary for converting the serial data stream into parallel data that is required with digital systems. Synchronization for the serial data stream is accomplished by adding start and stop bits to the transmit data to form a data character. Data integrity is ensured by attaching a parity bit to the data character. The parity bit is checked by the receiver for any transmission bit errors.
The circuit describes how to combine GPS into a navigation system by using a Philips 2-channel UART, the SC16C2552B. The SC16C2552B is a two channel Universal Asynchronous Receiver and Transmitter (UART) used for serial data communications. Its principal function is to convert parallel data into serial data, and vice versa. The UART can handle serial data rates up to 5 Mbit/s.
- SC16C2552BIA44 Dual UART, 5 Mbps (max.), with 16-byte FIFOs
- 80C51 CMOS 0 to 42 MHz Single-Chip 8 Bit Microcontroller
- 12 MHz Oscillator Clock
- 1.8432 MHz Oscillator Clock
- 22pF Capacitor – 2 Units
- 33pF Capacitor – 2 Units
- 0.1µF Capacitor – 2 Units
- 10 µF Capacitor – 2 Units
- 74LV04 Hex Inverter – 2 Units
UART in GPS navigation system – [Link]
A new multi-band satellite antenna developed by Imec in collaboration with Septentrio was announced at the Mobile World Conference held recently in Barcelona, Spain. The antenna is a multi-band design capable of simultaneously receiving GPS, GLONASS, BeiDou and GALILEO satellite signals. The resulting receiver is capable of resolving its location to within 1 cm.
The antenna is paired with Septentrio’s credit card-sized AsteRx-m receiver, a dual frequency GNSS (Global Navigation Satellite Systems) receiver that provides centimetre accuracy while drawing less than 500 mW
SatNav Antenna Fixes your Position to 1 cm - [Link]
UC20 module already provides besides a high speed UMTS/HSPA+ data transfer even the reception of data from GPS/ Glonass satellites.
When company Quectel launched on the market the UC20 3G module a few months ago, they also announced a forthcoming enhancement of functionality for reception of GPS/Glonass. We can unveil with pleasure, that reception of GPS/ Glonass signal via the UC20 module is already a reality and so this module has become one of the most versatile communication modules on the market. Combination of GSM/GPS/Glonass enables for example to design a device for monitoring of position of vehicles, goods, etc, by means of a single module.
At the same time, we also incorporated into our standard stock offer a miniPCIe version – UC20-E-MINIPCIE, increasing flexibility of usage of the module. All further information can be found in our recent article: Quectel 3G modules of UC20 series will ensure a fast transmission even on 900 MHz.
Quectel UC20 integrates GSM and GPS into a single module - [Link]
NavSpark is an arduino-compatible board with GPS for less then $20:
NavSpark is a small, powerful, breadboard-friendly, 32bit development board that is Arduino compatible, with a world class GPS receiver as on-board peripheral, and under $15.
There is also NavSpark-BD, a variant model having world-class GPS/Beidou receiver as on-board peripheral, that enables you to adopt new GPS/Beidou satellite navigation technology when Broadcom Qualcomm just recently came out with solution supporting Beidou to their tier-1 smartphone customers like Apple and Samsung.
NavSpark puts leading edge satellite navigation technology in the hands of the makers.
NavSpark: Arduino Compatible with GPS GNSS Receiver - [Link]
Telit and SiTime have teamed up to produce what is claimed to be, at 4.7 × 4.7 mm LGA (Land Grid Array) package, the world’s smallest and lowest power GPS receiver chip. The SiRFstarIV-based Jupiter SE880 receiver module allows extended hibernation periods drawing just 15 µA while maintaining a less than one second Snap Start.
The receiver combines Telit’s Jupiter SE880 miniature GPS receiver with SiTime’s MEMS SiT15xx low power oscillators. Its tiny footprint and low power consumption means that future mobile tracking devices and navigation aids can be made smaller and will last longer between charges.
The 750 nA core current and power saving features of the 32 kHz SiT15xx family contribute to the chips low power consumption compared to systems using traditional crystal clocks. [via]
The Tiniest GPS Receiver Chip - [Link]
The company U-Blox have announced the EVA-7M, a standalone GNSS positioning module claimed to be the smallest complete solution on the market. It supports US GPS, Russian GLONASS, Japanese QZSS, plus all SBAS augmentation systems. The module contains all the necessary components, including crystals and passives, it’s only necessary to add an antenna to give global positioning capability. The chip uses the company’s advanced GNSS u-blox 7 technology and achieves -160 dBm sensitivity when tracking GPS satellites (-158 dBm with GLONASS satellites). An integrated high-efficiency converter keeps power requirements down to 16.5 mA at 3 V.
The 7 x 7 x 1.1 mm LGA module eases implementation in end-products because both RF and digital domains are integrated and kept separate in the chip. The LGA pads are configured in single rows, unlike other GNSS receivers on the market. The EVA is a standalone receiver, providing positional information without the need for host integration or extra RF components. [via]
Complete Global Positioning Solution, Just Add an Antenna - [Link]
by Publitek European Editors
This article looks at the options for getting started with a GPS design for industrial applications, from the transceivers to modules and the evaluation boards available, as well as the antenna issues to consider. It looks at how modules from suppliers such as Antenova and NXP Semiconductors can be used, extending to single chip implementations from Maxim and Skyworks.
Navigation and positioning are becoming increasingly popular functions in many devices, from dedicated satellite navigation handsets to integration in mobile phones and automobiles. They are now appearing in digital cameras and even used for tracking high value assets, making the integration of navigation technology an important design element. However, this brings together digital processing, software, analog and RF design expertise that may not be common within one company.
Getting Started with GPS - [Link]
Kevin Rye has been working on his GPS clock project and wrote a detailed explanation on his blog describing the build:
The great thing about setting the time and date via GPS is that I won’t have to put any buttons on the clock. It’ll set itself, and appear to be completely autonomous. By removing the buttons needed for entering menus and setting the time and date, I can hopefully make the clock that much smaller. Ideally, I don’t want it to be any bigger than the display itself. In addition, shaving a half inch or so off the PCB should save a few bucks when it comes to getting the PCB made.
GPS clock prototyping - [Link]
GPS modules from company Quectel have excellent features and enable a relatively quick development of applications also thanks to ready-made development kits.
GPS receivers are still more often used in various segments, what is also reflected in our offer of top-featured GPS modules from company Quectel. Naturally, it is ideal, when there´s also available a development kit for a given module. Really, development kits are the components, which significantly help at development and thanks to a simplified and accelerated development, this investment usually refunds very quickly. That´s why it´s possible to find in our offer development kits for almost every GPS or GSM/GPRS module from Quectel, moreover immediately available directly from our stock.
Do you want to know your position? - [Link]
j3tstream build this Teensy GPS logger:
Issue encountered: On the first board prototype i have mounted a PA6B without problem, when i powered up the pcb for the first time the GPS try to lock to satellite, in this case the 3d fix output should continuously output one-second high-level with one-second low-level signal, in theorical, regarding the data sheet, when the GPS is locked on the satellite, the output pin should continuously output low-level signal, but in my case, the output give me a high level signal, probably du to the firmware, so i decided to re-upgrade with the default factory firmware, the software, firmware, and guideline are available here. Be careful, the factory firmware set the baud rate to 9600bps, not 4800.
Teenlogger, a Teensy-based GPS logger - [Link]