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Sue Mann

on 17 May 2010

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Transcript of Cellphones

> < ^ ^ Menu Cell Phones Most Expensive Cell Phones History 1 2 3
ABC DEF 4 GHI 5 JKL 6 MNO 7 PQRS 8 TUV 9 WXYZ O * # Tone Oper Progression of Cell Phones Why its Called a Cell Phone Physics of Cell Phones Types of Cell Phones What Happens When you Make a Call
Impact Pros of Digital Interesting Facts What are Cell Phones?
cell phones are complex radios
There are two main types of cellphones
Analog Cell Phones
Digital Cell Phones Analog Cell Phones- 1G
the first cell phones used analog technology
analog technology uses the vibration of your voice
many landlines use analog technology
the major part of cell phone system is the cell
since there are many cell phone users across the country
the carrier spilts each city up into cells
each cell is about 26 square kilometres
since cell phones and the cell phone tower use low
power transmitters the same frequencies can be reused in non-adjacent cells

Channels- a cell phone has about 1,664 channels
- CB radios have 40 channels

Range - many walkie talkies can transmit signals
about 1.6 km
- cell phones can transmit signals anywhere
within a cell
The Age of Digital 2G
technology in a digital cell phone turns the sound of your voice into a pattern or string of numbers( binary numbers ( 1's and 0's))
they take these string's of number and beam them up into the air
Cell Phone Facts 1. There are as many active cell phones on the planet as there are people. (3.3 billion) 2. The difference between a walkie-talkie and a cell phone is that walkie-talkies can communicate as far as 1000 ft. and cell phones can transmit several miles away from the cell tower. 3. The first mobile phone device was invented by Motorola, the device named DynaTAC 8000X 4. The first truly mobile phone (one that didn’t require its own case for transportation) went on sale in 1985. 5. Cell phone antennas were no longer needed when cell providers switched from an AM frequency to an FM frequency. 6. Up to 60% of the radiation emitted by a typical cell phone, (enough to cause heating), will be absorbed by the user’s head. 7. Manufacturers could make the phones so less radiation would escape into the user’s head, but most are unwilling to do so, apparently because to do so would decrease their profit, and acknowledge the potential risk. 8. The scientific name for cell phone ring vibration is “lexdosia” 9. Cell phone companies spent about $4 million in the 1980s to develop 3 additional musical notes so that each number would have its own unique sound. 10. Koreans teens are the #1 texters; sending more than 200,000 text messages a year. 11. The most common texted word is not a word, but rather the letter “r”. 12. Most cell phones contain about $9 of gold in the circuitry. $0.02 if you go through Cash4Gold. Mobile Phones are called cell phones because of how they operate the mobile phones that we have in present day transmit signals to cell towers Each cell phone provider has about 800 channels and there more than 800 calls made in one city at the same time What does this mean ? each cell phone provider spilts the city into cells which have cell tower in each the mobile phone transmitts signal to the cell phone tower within the cell thats why they are called cell phone- transmitt signals inside a cell Analog Cell Phones Use
Frequency division multiple access
also called FDMA technology
FDMA puts each call on a separate frequency Digital Cell Phones Use
Time Division Multiple Access (TDMA)
TDMA assigns each call a certain portion of time on a designated frequency
1. Goldstriker iPhone 3GS Supreme $3.2 million
This luxury gadget from designer Stuart Hughes is the world’s most expensive cell phone. Unveiled in 2009, its incrusted and covered with 271 grams of gold, and more than 53 gems of diamond.
2. GoldVish Le Million- $1.3 million
This phone was certified, “unique” by the Guinness World Records in 2008. It’s covered in diamonds, and white gold.
3. Diamond Crypto Smartphone $1.3 million
Made in Moscow, this is probably the most expensive smart phone, similar to others, is covered in diamonds.

4. Vertu Signature Cobra- $310,000
French jeweler Boucheron is the producer of this luxuary gadget. Vertu cobra phones are part of a limited edition series, and so far only eight cobra phones are made. One carat round diamond, two carat pear cut diamond, two emerald eyes and 439 rubies all totaling to 21 carats are used to give the phone a cobra look. Vertu phones also provide service and information about travel, restaurants, entertainment and events. A cheaper version of the same cell phone which is reuby free is available at $115,000.
5. VIPN Black Diamond Smartphone- $300,000
6. iPhone Princess Plus- $176,400
It is so named because of the princess shaped diamond cut it features all over the casing.
7. Vertu Diamond- $88,000
The phone has a ceramic composition mixture, originally intended for the space shuttle program. The main drawback of the phone is the absence of a camera, and only 200 such phones have been sold worldwide.
8. Motorola V220 Special Edition- $51,800
This phone is designed by an Austrian, and is definitely a more feminine phone. It’s studded with 1200 diamonds on the front, and is laid with gold on the inside.
9. Gold Edition Nokia 8800- $2,700
10. Nokia Lamborghini 8800 Sirocco- $ Yet to be announced
This is a Nokia product is part of the Lamborghini limited edition and is yet to be given a price tag. Its coated with sapphire glass, and has all the features you’d want in a phone like it When you first turn on a phone it listens for a System Identification Code (SID) on the control channel If the phone can't find any control channels to listen to, then its out of range and will display on the phone a "no service" message When it receives the SID, the phone matches up
to the SID programmed into the phone The phone also transmits a registration request,
along with the SID and the MTSO keeps track of your phone's
location in a database The MTSO gets the call that is calling you and
it tries to find you by looking in its system
to see which cell you are in The call is sent to you at that time As you travel and move near the end of your cell, your cell's base station sees that your signal strength becoming lower. The base station in the cell you are moving closer to sees your phone's signal strength increasing. They coordinate with each other an change the frequency of your call as you approach the new cell. Half Duplex Full Duplex

Digital technology is much more efficient when using band-width. Due to digital compression, more data can flow over a network, efficiently.

Digital allows easy integration with personal communication systems (PCS) such as hand held devices, palm pilots and hopefully in the future everything digital.

Digital offers superior cellular voice transmission quality over long distances. Most cellular users also experience better reception and connections.

Since Digital is so efficient, It can lower average transmitter power as digital works 'less harder' as analog transmissions.

Digital enables smaller and less expensive individual receivers and transmitters. Anytime cellular carriers can save money using a superior technology, that's where they will go - and right now it's digital.

Quiz How it all began 1843
•Michael Faraday – questioning whether space could conduct electricity
•His discovers had a great impact on technology today
•As well as the development towards the cellular phone

-Dr. Mahlon Loomis- was the first person to communicate through wireless via the atmosphere
-transmitted telegraphic messages at a distance of 18 miles
-developed a method of transmitting and receiving messages by using the Earth's atmosphere as a conductor
-was awarded a $50,000 research grant
•Dr Martin Cooper, is considered the inventor of the first portable handset
•former general manager for the systems division at Motorola
•first person to make a call on a portable phone
•1st base station was set up in New York first working prototype of a cellular telephone, the Motorola Dyna-Tac
•Cell phones go public
•Chicago was where the first trials began with 2000 customers
•Japan began testing cellular phone service in 1979
•The Cellular Technology Industry Association (CTIA) was developed to lay down practical goals for cellular phone providers
•In spite of the unbelievable demand, it took cellular phone service 37 years total to become commercially accessible in the US
•today there are more than 60 million customers with cellular phones, even though wireless service was just invented nearly 50 years ago
•$3 million market 25 years ago and has grown increasingly to close to a $30 billion per year industry
•For a while the term "car phone" was extremely popular
First Cell Phone (1983): Motorola Dyna-Tac
Size: 9 x 5 x 1.75 inches
Weight: 2.5 pounds
Display: None
Number of Circuit Boards: 30
Talk time: 35 minutes
Recharge Time: 10 hours
Price: $ 3,995
Features: Talk, listen, dial
1.What type of system does a cell phone operate on? 2.How many channels does a typical cell phone have? 3.What are the 2 different types of cell phones and which ones came first? 4.What is the difference between a radio and a cell phone? 5.What is FDMA and what does it stand for? 6.What is TDMA and what does it stand for? 7.Give a reason as to why Digital technology is much better than analog technology? 8.What is the unique 5-digit number that is assigned to each carrier by the FCC? 9.Why may a cell phone have “no service”? 10.Who is considered the inventor of the first portable handset phone? 11.What is the DynaTAC 8000X? 12.What were no longer required when cell providers switched from an AM frequency to an FM frequency? 13.What is the scientific name for cell phone ring vibration? 14.How much slower is reaction time for a person using a cell phone in comparison to someone driving under the influence of alcohol? 15.What is the average life of a cell phone before it needs to be replaced? 16.In which countries do people pay the most and the least for cell phone service per year? 18.What year did the first “true” phone go on sale? 17.How heavy was the 1st cell phone ever made, and how much did it cost? 19.How much radiation emitted by a cell phone will be absorbed into the user’s head? 20.When is the first cellular commercial phone call made? And name another invention of this time? 21.How much money worth of gold will you get out of a typical cell phone? What's the difference ?
radios operate on a half duplex system
cellphones operate on a full duplex system Cell phones have had a huge impact on society in many ways. Accessibility of information
Time management
Individuality, status and confidence
A mobile economy

Off. . .
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