Wireless Communication

Probably one out of every 5 people.

Mobile-phones emits small amount of electromagnetic signal via the radio waves which is RF energy. Every Mobile-phone has a low power transmitter in them. While talking over the cell-phone, the transmitter takes the sound of voice & changes it into a continuous sine wave. Sine wave is measured in terms of frequency.Transmitter sends the sine wave to antenna. Antenna transmits the sine wave in the form of electromagnetic signal to the BTS. Cell-phone works by communication between service n/w through BTS or cell tower. Cell towers divide the city into small areas or cells. As the user moves from one cell to another, the signal along with the information is handed over from tower to tower.

What teens love best about texting, is that they can keep in touch with their friends all the time.

1980 was the time where cell phones actually became widely available. They were somewhat bulky, kind of like a brick. The 1980 cell phones allowed 30 minutes of call time and took 10 hours to charge. People don't realize how lucky we are today.

I think OFDMA is used for cellphone communications via satellites. As far as I know, it is the best technique available which addresses all challenges like multipath fading, error correction, effective bandwidth utilization, security issues etc.

Here, harmonics of a base carrier are considered for modulation. These signals will be orthogonal to each other. Hence can be overlapped on each other for transmission, without the signals getting collided. If we use N such orthogonal carriers, the BW requirement will be N times lesser than the classical modulation schemes (such as ASK, BPSK etc.)

Practically, using N signal generators to produce precise orthogonal signals is difficult. Hence we do this in digital domain, where IFFT operation performs the same. (producing & adding orthoganal carrier signals).

I'm Shreyas. Setting up an OFDM based Tx-Rx model was my academic project during my bachelor studies under Telecommunications.

Hope I have answered in a simple way, with enough details :)

Earlier it was "Intelligence Everywhere", "Hello Moto" now it is "Life Mpowered"

Acronym for 'shake my head' or 'shaking my head.' Usually used when someone finds something so stupid, no words can do it justice. Sometimes it's modified to 'smfh' or 'smmfh' by those that prefer profanity in their internet acronyms.

First mobile phone 📱 was invented by Martin Cooper on 3rd April 1973. He was a researcher in Motorola.

To allow for constant connectivity to an office or home without being tied down to a wired connection. Every time a person takes an out of town trip, or goes to a different office, he or she would have to call family or coworkers, and relay a land line telephone number to a phone where they were at. This is too hampering. With all the advanced features of Cell Phones and PDA's today, wireless connectivity (constant) is even more encompassing with the advent of coast to coast towers for seamless connectivity.

The time taken for a cell phone to be manufactured depends on how many steps are needed during the process. An iPhone, for example, has 141 steps in the process. This takes around two days.

Of course she did

A cell phone upgrade is the act of purchasing a new cell phone and a new contract (most contracts last two years) after you are finished with your old contract. You do not have to upgrade right when your contract ends; your bills will follow a temporary contract-free pattern until you upgrade. You can also switch to another carrier once your old contract is over rather than upgrading and you will not receive an early termination fee from your first carrier.

Advantages of Phone masts are:1. Connectivity: A phone mast in your area can help you to improve your connectivity to mobile networks. It includes both the connection you receive for making telephone calls and connectivity for other functions like Internet access on smartphone.2. Emergencies: Having a phone mast in an area where a person has gone missing increases the chances of emergency services or the police being able to locate him. 3. Weather: Phone masts cover vast populated areas across the world; they have the potential to gather more substantial amounts of weather data than ever before. So it can help communities to prepare for and cope with potentially disastrous weather events.

Usally the way u can get ure ringback tones is go to the website brand you got ure phone from like for instance:[www.verisonwireless.com] Than u have to sign up for an account. than get ringback tones

I have a Tracfone and it is a good phone as long as you don't waste your minutes!

There are many carriers offering a pay as you go service. Contracts and terms vary carrier to carrier. Here is a short condensed list of carrier programs. AT&T: GoPhone T-Mobile: ToGo Verizon: InPulse Pay as You Go Virgin Mobile

No. What if an Emergancy happens? And Also a lot of people do work off of their phone. No one needs to get into anyones personal business. I think it shouldn't be up to the government. It should be up to us. What a "free country" this is!

"Trikon Technologies Inc., which makes equipment used in the construction of cell-phone components, said in a recent release that the worldwide handset market is "forecasted to reach 1 billion units by 2006."

- Buy Cell by Daniel Gross, http://www.slate.com/id/2101625/, article posted June 2, 2004

I have personaly done it and yes it is very safe.But you cant make calls or even get in to the internet.You can just play noninternet based games on it.

Communication, Modernism, depending on the type of cell phone it could represent the social standing of a person, wealth

a conversation that annoys people nearby.

in a way, no. They create sound waves using a speaker so you can hear what the person at the other end of the line is saying. EMR is used in transmitting the signal. These are very different to sound waves.

That's the part with the lowest frequencies/longest wavelengths of any in the

electromagnetic spectrum, which we broadly call "radio waves".

You can think of it as all frequencies from maybe 30 KHz to 300 GHz, corresponding to

wavelengths from 1 millimeter to 10 kilometers.

These are not exact, hard and fast, official numbers.

== == Simply put, cell phone transmitters emit radiation. As with all forms of radiation, if enough is able to penetrate into your body, there is the risk that a cancerous growth could develop. The related links take you to a number of articles citing research into a possible link between phone masts and illnesses such as, but not limited to, cancer.