Can any one explain the 3GPP, WLAN, WiMAX and UWB?

[BigDogBear]

3gpp explain

what technology they are base on respectively, what's their application field, and which one will be more hopeful in the future?

 

[osbourne]

wlan wimax carrier frequency

Hi,

3G is based on cdma (code division multiple access), every user is assigned its own code for transmission. All useres transmit at the same time in the same frequency band. They can be distinguished by their codes.

WLAN is based on frequency hopping. Transmission carrier frequency changes according to some code.

As all these standards are quiet complex, you should consult textbooks for details.

 

[pixel]

explain 3gpp

3Gpp
3G, third generation of mobile communications is based on CDMA / spread spectrum principles. Also you have this extensioms for fiiles that can be downloaded new generation of mobile phones.

WLAN
wireless Local Area Network
good for games...

WiMaX
?

UWB
Ultra widh band technology is based on spread spectrum.

 

[semiconductor]

explain uwb

My answer to your question

1- 3G: Third Generation

2- WLAN

3- WiMax
WiMAX is a standards-based wireless technology that provides high-throughput broadband connections over long distances.
WiMAX can be used for a number of applications, including "last mile" broadband connections, hotspots and cellular backhaul, and high-speed enterprise connectivity for business.

refer to the following link for further information
**broken link removed**

3- UWB
Ultra WideBand Technology

A traditional UWB transmitter works by sending billions of pulses across a very wide spectrum of frequencies several GHz in bandwidth. The corresponding receiver then translates the pulses into data by listening for a familiar pulse sequence sent by the transmitter. Specifically, UWB is defined as any radio technology having a spectrum that occupies a bandwidth greater than 20 percent of the center frequency, or a bandwidth of at least 500 MHz.

Modern UWB systems use other modulation techniques, such as Orthogonal Frequency Division Multiplexing (OFDM), to occupy these extremely wide bandwidths. In addition, the use of multiple bands in combination with OFDM modulation can provide significant advantages to traditional UWB systems.

UWB's combination of broader spectrum and lower power improves speed and reduces interference with other wireless spectra. In the United States, the Federal Communications Commission (FCC) has mandated that UWB radio transmissions can legally operate in the range from 3.1 GHz up to 10.6 GHz, at a limited transmit power of -41dBm/MHz. Consequently, UWB provides dramatic channel capacity at short range that limits interference.

refer to the following links for further information
https://www.multispectral.com/

 

[sadallday]

explain the working of wlan

I think, compare 3GPP, WLAN, and UWB with WiMAX wimax have the most advantages. Such as :- support in LOS and NLOS application
- operation in 2-11GHz licensed and unlicensed band
- coverage about 30 miles
- data rate up to 75 Mbps
- support full mobility at 160KM/h
WiMAX is an emerging global broadband wirelss access standard
More information about WiMAX please :
https://www.wimaxforum.org/home/