Thursday, May 20, 2010

What Is Wireless Broadband?

Broadband is generally communications that exceeds the frequency width requirements of a telephone call. This is 56kbps or 56 Kilobits per second. Note, this is the same use of "Band" as used in radio bands, citizens band etc. Specifically an allotment of frequency high enough to achieve the
greater bit rate.

Until relatively recently, it was not considered practically possible to achieve broadband wirelessly because frequency was limited. Two things have made this commercially feasible. The first is inexpensive solid state microwave transcievers. The second is what is known as "Spread Spectrum" modulation techniques. In spread spectrum multiple frequencies are used simultanously to send the same information. A single "Bit" actually goes out on short microwave bursts of different frequencies known as "Chips" or "Chirps". This allows many different communications to occur simulaneously in an alloted set of frequencies and to use them effectively for broadband.

Increasingly almost all communications, even voice and music is shifting over to wireless broadband, this is why the comment about "internet" is not true. All cell phones actually digitize the voice and use wireless broadband. Cordless phones use a similar technique. HD Radio is using wireless broadband methods over the FM radio band. HD TV which has supplanted conventional TV broadcasting uses wireless broadband techniques to pack more information into less frequencies. Yes, Internet access provided for cell phones uses wireless broadband too. So does WiFi and
Bluetooth.

Wireless broadband refers more to technologies like WiMAX and 4G networks. While EVDO, WiFi, and Bluetooth are all valid wireless technologies, they don't address the higher goal of pervasive, fast-as-wired, internet connection that "wireless broadband" promises.

Broadly, wireless broadband is the emerging technologies that the wireless carriers are deploying exclusive to data. Mostly, this is referring to technologies beyond 2G or even beyond 3G(depends on what data rate is considered true 'broadband'). 4G Wireless WAN technologies such as Wimax and LTE are considered true mobile broadband with typical rates in the 5-6MBPS range(whereas 3G technology such as EVDO is typically sub 1MBPS in current deployments).

To see what kinds of choices may be available to you check out .....

Wireless Broadband

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