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south-east european

INDUSTRIAL MARKET 3

PAID ARTICLE

Zoltan Kiss

Sales manager - Eastern-Europe

e-mail: z.kiss@endrich.com

satellites, that was enough to get usable coordinates, but need six or even eight ones. It

is not always possible to get eight satellites in view in certain part of the day, especially

in environment with disturbing objects like high buildings, trees and hills. The integration

of different systems would provide the advantage of using many more satellites, like for

instance the combined usage of GPS and GLONASS systems provide access to more

satellites, than GPS alone. The 24 GPS satellites are extended with the GLONASS

ones, which results more precise functioning, especially when the receiver is used in

higher latitudes, where some of the GPS satellites are below the horizon of the observer,

therefore even less would be available at the same time.

The so called GNSS receivers can detect signals of combinations of global positioning

satellite systems, like GPS, GLONASS and later on GALILEO in order to shorten the

time of the first fix (TTFF) of position and provide more accuracy.

For above purposes Endrich offers a number of GNSS receiver modules from our

supplier LOCOSYS, a TS16949:2009 approved innovator and leader of the GNSS mar-

ket, engaged to the quality of the products.

Locosys, the partner of Endrich offers a number

of receiver modules for the detailed GNSS systems,

which could be used for instance for mobile alarm

systems of cars, boats, motorcycles, week-end

houses as well as track and trace devices for hu-

man , animal and cargo tracking applications. The

chipsets being used are from Mediatek, CSR

(SIRF) and STM. Mediatek chips support concur-

rent multi-GNSS receiving including GPS, GLO-

NASS, Beidou, Galileo, QZSS as well as SiRFstarV

chips. The result is high availability and accuracy

for positioning and navigation outdoors or on pedestrian areas. STMicro chips are used

for more enhanced systems, like automotive market having the appropriate AECQ100

approvals. The firmwares are programmed in house, therefore software platform and

programming environment are available for all modules.

For cheaper applications with less requirements ROM based firmwares could be used,

for more complex tasks -like for advanced GPS functions - Flash memories are used.

Customization of the antenna into customers application is possible.

GNSS smart antennas

The GNSS smart antennas include a board level

GNSS receiver and an embedded GNSS patch an-

tenna integrated into one compact enclosure. The

product, that Locosys offers is based on MediaTek

chip solution. The GPS smart antenna will acquire

up to 66 satellites at a time while providing fast time-

to-first-fix, one-second navigation update and low

power consumption. It can provide user with superi-

or sensitivity and performance even in urban canyon

and dense foliage environment. Its far-reaching ca-

pability meets the sensitivity requirements of car nav-

igation as well as other location-based applications.

GPS timing

In addition to positioning data, the GPS provides a very important dimension, the time.

Each of the satellites contains atomic clocks that insert precise time data to the GPS

signals. GPS receivers decode these signals, and synchronize themselves. Instead of

operating expensive atomic clocks, this feature enables users to determine the time very

precisely. Precise time is very important to a large number of tasks in parctise. Commu-

nication systems, traffic signals, electrical power grids, and financial networks all rely on

precision timing for synchronization. The availability of GPS time provides a cost effec-

tive way for engineers to realize time base for computer network applications, time stamp

for bank card transactions or synchronizing radio broadcast. Weather forecasting, dis-

tributed networks of instruments over wide geographic areas all need precise timing for

perfect functioning. Power plants and distribution companies need improved time syn-

chronization throughout the power grid in order to locate the anomalies propagate

through the network segments. We can also provide solution with the Locosys timing

module with the physical size of 16 x 12.2 x 2.2 mm

equipped by UART/CAN BUS/USB interface.

TMC Module

The LOCOSYS TMC-1009 RDS tiny module is designed

to allow easy integration of TMC (Traffic Message Chan-

nel) functionality in customer portable devices or mobile

navigation systems. TMC-1009 can receive and decode

the TMC information efficiently and output the data with

AdvanceTMC protocol which is NMEA-like ASCII message

and downward compatible with OpenTMC v2.0.

GNSS (Global Navigation Satellite System)

receivers in the Endrich delivery program

Global navigation is becoming more and more standard in the traffic, cars are equipped

with ex-factory or aftermarket receivers, aircrafts, ships and boats are using GNSS to

navigate and also the precision agriculture requires this technology to navigate the heavy

equipments like harvesters in order to define the yield map of the area being harvested.

GNSS is the generic name of SAT based navigation systems that are providing autono-

mous geo-spatial positioning. There are number of networks that use their own satellites in

combination with the associated earth stations in order to transmit correct positioning and

timing data. All these systems that are global are collected under the name of GNSS. We

would like to shortly show them in this article as well as some special devices, that could

be used in receiver applications, like smart antennas, complete GNSS/TMC modules and

receivers, being able to use the advantage of interoperability between different systems in

order to maximize the performance of the navigation.

GNSS systems

GPS:

GPS was created originally for military purposes

and run with 24 satellites. It became fully operational in 1994

also for civil and commercial users around the world. It is

run by the United States government and is freely accessi-

ble to anyone with an appropriate receiver. By today it has

more than 30 available satellites.

Glonass:

GLONASS is a global satellite navigation sys-

tem of Russia and is the only alternative navigational sys-

tem in operation with global coverage and of comparable

precision next to the GPS system. Development started in

1976, and became fully operational with its 24 satellites by

2010. 18 out of the 24 satellites cover the complete area of

Russia.

Galileo:

This is the GNSS being designed by the Europe-

an Union, in order to provide an accurate positioning sys-

tem for the citizens of EU independent from the American

GPS, Russian GLONASS and Chinese Beidou systems,

that can be switched of in case of a conflict between the

countries. At the moment a few satellites have been

launched for testing the system, full functional constellation

will consist of 30 satellites and expected to be done in 2019.

The accuracy of one meters and the better possibilities of using positioning in high

latitudes would be extended with a unique search and rescue function that will also

provide feedback to the user confirming that position has been detected and help is on

the way.

Beidou and Compass:

These two systems are devel-

oped by China. Beidou is an operational regional test sys-

tem - consisting of originally three , and lately ten satellites

and providing limited functionalities for mainly Chinese cus-

tomers- , while its second generation - called also as Com-

pass - will be a global system of 35 satellites and planned

to be fully finished by 2020.

The Quasi-Zenith Satellite System (QZSS)

consists of

a multiple number of satellites that fly in the orbit over Ja-

pan. Its main task is to increase the availability of GPS sig-

nals in areas like canyons and valleys, where only the sat-

ellites of very high elevation can be seen. By sharing al-

most the same positioning signals with the GPS system,

territory of Japan can enjoy improvements of positioning

accuracy from meter to the centimeter level, more reliability

and better availability of GPS signals. In order to have always at least one available

satellite over Japan, three QZSs are necessary.

GNSS modules (concurrent multi-GNSS receiving)

The performance of the SAT navigation systems is defined by the following four criteria:

• Accuracy: The desired minimal difference of the real position, speed and direction of

the object and the geo-position measured by the receiver

•I ntegrity: The capability of the system to provide confidence in signaling system ab-

normalities

• Continuity: the system's ability to perform without interruptions

• Availability:Maximumtimeduringthesignalmeetsthecriteriaofaccuracy, integrityandcontinuity

In order to get the best performance of the signals it is not enough only to see four

dipl. Ing. Zoltan Kiss Eastern European Sales Manager

Endrich Bauelemente Vertriebs GmbH