0
OFDM (orthogonal frequency division multiplexing) is a technique for increasing the amount of information that can be carried over a wireless network.
In frequency-division multiplexing, multiple signals, or carriers, are sent simultaneously over different frequencies between two points. However, FDM has an inherent problem: Wireless signals can travel multiple paths from transmitter to receiver (by bouncing off buildings, mountains and even passing airplanes); receivers can have trouble sorting all the resulting data out.
Orthogonal FDM deals with this multipath problem by splitting carriers into smaller subcarriers, and then broadcasting those simultaneously. This reduces multipath distortion and reduces RF interference (a mathematical formula is used to ensure the subcarriers' specific frequencies are "orthogonal," or non-interfering, to each other), allowing for greater throughput.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What is SISO-OFDM?
SISO-OFDM is an OFDM system with one transmit and one receive antenna.
Is wimax launch in India?
Yes, WiMAX is launched in india. till now its for fixed wimax (802.16d).
What are the latest developments in wirelessmoblie networking technologies?
WiMax http://en.wikipedia.org/wiki/Wimax
What topic does the Wimax forum discuss?
The company Wimax is a wireless communications standard designed to provide 30 to 40 megabit per second data rates. The Wimax forum was created to promote the Wimax company and offer online support to customers.
How many sub channels does OFDM use for carrying data?
OFDM uses 48 subchannels for data and 4 are used as Pilot Carriers.
What is loss of orthogonality means in OFDM technology?
In OFDM, sub-carrier spacing is maintained in such a way that the maximum of one sub-carrier occurs at the minimum of the successive sub-carrier, a loss of orthogonality results if this pattern is not achieved in the sub-carriers of OFDM transmission. Loss of orthogonality is due to ISI, ICS, Frequency offset amongst the sub-carriers of OFDM.
What is 'ofdm'?
Orthogonal frequency-division multiplexing
What is the definition of wimax?
WIMAX is acronym that stands for Worldwide Interoperability for Microwave Access. It is a wireless network protocol
What are the similarities and differences between WiMax and Wifi?
a group of wifi can make a wimax which consist of hot spot
What is the installation of WiMAX?
from wiki The original version of the standard on which WiMAX is based (IEEE 802.16) specified a physical layer operating in the 10 to 66 GHz range. 802.16a, updated in 2004 to 802.16-2004, added specifications for the 2 to 11 GHz range. 802.16-2004 was updated by 802.16e-2005 in 2005 and uses scalable orthogonal frequency-division multiple access (SOFDMA) as opposed to the OFDM version with 256 sub-carriers (of which 200 are used) in 802.16d. More advanced versions, including 802.16e, also bring Multiple Antenna Support through Multiple-input multiple-output communications (MIMO) See WiMAX MIMO. This brings potential benefits in terms of coverage, self installation, power consumption, frequency re-use and bandwidth efficiency. 802.16e also adds a capability for full mobility support. The WiMAX certification allows vendors with 802.16d products to sell their equipment as WiMAX certified, thus ensuring a level of interoperability with other certified products, as long as they fit the same profile. http://en.wikipedia.org/wiki/WiMAX
What Is WiMAX mpeg 7 a mobile technology?
Actually wimax mpeg 7 are two word WIMaX- wimax is wireless technology MPEG -7-Moving Picture Experts Group . it use in multimedia. These are the two different technology which combined feature is coming in mobile technology
Is wimax in Malaysia?
Yes
