All About CDMA

All About CDMA

Today there are two major standards for cell phone technology. CDMA and GSM. Almost all phones in the United States operate on either of these networks. However, the average person tends to be unfamiliar with these terms. Common cell phone service providers like Verizon and Sprint use CDMA technology, while carriers like T-Mobile, and Cingular operate on the GSM network.

CDMA stands for Code Division Multiple Access, but was originally known as IS-95. Qualcomm was the first to created this technology and by 1993 it was adopted by the Telecommunication Industry Association. Later this technology was enhanced and refined by Ericsson.

Since the development of CDMA technology there has been many new releases and platforms. The original CDMA is now referred to as CDMAone. Several different variants of CDMA technology been developed continuously improving quality and data transfer speeds. Third generation CDMA technology, commonly referred to as CDMA2000 encompasses a wide variety of different standards, each continually improving upon the first including; 1X EV, 1XEV-DO, and MC 3X. CDMA2000 is the current standard used by most US carriers today. The first release of CDMA2000 was refereed to as either 3G1X, 1XRTT, or 1X. Designed to provide data transmissions of ten times faster then the previous technology and double the voice capacity of CDMAone.

As stated above, Verizon Wireless operates on the CDMA network. Depending on the phone you have and its capabilities you will notice symbols in the default screen of your phone reading either 1X, 1XEV-DO or some variation of the two. This symbol defines the CDMA2000 standards your phone is operating on. Newer phones will display EV or EV-DO using the newer faster, more reliable CDMA technology.

Enhanced data transfer provides for the new technologies released by companies like Verizon. Including data transfer for files, music, games and the Internet.

WCDMA technology, standing for Wideband Code Division Multiple access, is the most developed and advanced form of the third generation CDMA2000 technology. It encompasses higher data transfer rates and provides wireless connections in markets world wide. Many existing GSM 2G (GSM/GPRS) operators have slowly began the switch to using WCDMA technology.

Qualcomm the original developer of CDMA owns patents of this technology. They have granted royalty-bearing licenses to over 100 network operators. The chart below displays the number of operators, vendors, subscribers and countries each technology is used in.

CDMA 1X:

Subscribers: 33,000,000 Operators: 33 Counties: 20 Vendors: 25

CDMA 1X2000, 1XEV-DO:

Subscribers: 193,000,000 Operators: 98 Counties: 48 Vendors: 57

CDMA 1X:

Subscribers: 56,000,000 Operators: 101 Counties: 44 Vendors: 22

By : Garrett Friedman
Keyword : CDMA, CDMA2000, CDMAone, 1XEV-DO, 1X, Verizon Wireless, Sprint, cell phones, cell phone network,

Automatically Tracking Your Car, Fleet, or Boat with GPS

Automatically Tracking Your Car, Fleet, or Boat with GPS

There is a huge number of GPS products on the market for all sorts of purposes. For example there is a specific subcategory of GPS products tailored for vehicle tracking and surveillance- in other words, tracking a car, a fleet, or any other automobile (hey you could even track a boat, etc).

Certain product lines are sold only through authorized dealers and distrubutors- these are generally the more higher end GPS units used by heavy industry or car rental companies.

You can consider GPS car tracking as a branch of security as well as something that can help fleet management companies or car rental facilities, etc, to manage their operations more effectively, cut costs, and find out who's slacking on the job.

Back in the day, the primary security method for your vehicle was to have one of those annoying sounding alarm systems. And more recently the security bar we place on our steering wheels when parking. Well now for those extra paranoid folks out there you now have the option of using GPS tracking in case your car ever got stolen.

Or you could always pretend to be James Bond and follow your kids around to make sure they are not falling into the wrong crowd. Those are just a few possible things you can do. It's up to you to decide what you are looking to do.

The truth is, the global climate of security is not what it used to be, at least not in the . Therefore the sense of having an extra peace of mind can go a long way in these uncertain times.

Please note that not all GPS offerings will be the same- depending on the extra features you are looking for, and whether you want a third party to monitor and track you vehicle or even fleet of vehicles, there may be a subscription fee involved someplace.

Keep in mind that is that not all GPS models will work the same way. For example, if you want to track your personal vehicle, there may be a certain proximity range that you must be within in order to track down the signal. Little things like this can make a world of difference in your decision on a GPS car tracking system.

GPS tracking services for people and objects will become an indispensable tool in your arsenal of security devices.

By : Simon Wyryzowski
Keyword : GPS Live Tracking, GPS Freight Tracking System, GPS Tracking Services For People, GPS Amplifier

All About GPS and How It Works

All About GPS and How It Works

GPS or Global Positioning Systems are computer systems that use satellites in orbit around the globe to provide exact longitudinal and latitudinal position of the user. GPS units were originally designed by the Department of Defense for military purposes and are now used on the consumer level for day to day navigation. Some GPS units sell for less than $100.00 and as long as you have one and have a clear sight of the sky you will never be lost again. In fact most GPS receivers can pinpoint your location on the globe within about 50 feet. GPS units vary in price based on their quality and capabilities, so when shopping for one it is important to know what you are planning to use it for.

GPS systems are mostly used by consumers for two purposes, positioning and navigation. GPS units are placed on boats so boaters can have an idea of where they are in comparison to the shoreline. In cars they are more often equipped to provide directions to the driver from two different points. Some of the more expensive models come equipped with voice capabilities so that drivers don't even have to take their eyes off the road. Many handheld models are sold to outdoor enthusiasts for camping, hunting and hiking. These handheld models also range in price based on their capabilities and if the display comes in color or not.

Most GPS units will also provide you with some standard and useful information�..

� An Odometer (Distance you have traveled)
� Time you have been traveling
� A Speedometer (How fast you are currently traveling)
� Average speed for the journey
� A map of you trail so far
� E.T.A (Estimated time of arrival)

GPS units use four satellites orbiting the globe to triangulate your position on earth and can do so with extreme accuracy. If you are constantly lost behind the wheel or spend a lot of time in the outdoors purchasing a GPS unit might be the right move for you.

By : David Stone
Keyword : gps,global