Wireless Internet Modulation?

[johan_tr2000]

Hi all,
I just wonder what kind of modulation they used for wireless internet communication at 2.4Ghz or 5GHz.
Any one have a good e-book or link for this topics? Pls share.

Thx in advance

Tr2000

 

[yellowtooth]

wireless communication ,but why internet ?

do U mean 802.11a & b ?

U can search in by google with key word...

 

[Element7k]

Hi,

the best thing is to look for out IEEE 802.11 standards.

802.11, uses Frequency Hopping Spread Spectrum

802.11b uses Direct Squence Spread Spectrum

802.11a operates at 2.4 & 5 GHz and use Orthogonal Frequency Division Multiplexing.

Hope it helps.

Element7k

 

[Kit-the-great]

The most of the commercial radiomodems uses the phase-shift keying signal. Some of 5.2 GHz modems uses the amplitude modulation of signal.

Best regards,
Kit-the-great

 

[johan_tr2000]

Hi,

Any clue, link or e-book about this, pls

Rgds,
TR2000

 

[yellowtooth]

www.Intersil.com

a company who turn out 802.11 chip.

 

[yellowtooth]

A PDF I DL before:

maybe is useful 2 U.

 

[harlan1]

IEEE 802.11

Hi johan_tr2000,

Take the following app. notes from the @gilent site:

Application Note 1380-1 (RF Testing of Wireless LAN Products)
Application Note 1380-2 (IEEE 802.11 Wireless LAN PHY Layer (RF) Operation and Measurement)

Rgds,

harlan1