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Orthogonal frequency-division multiplexing - Wikipedia, the free ...


The OFDM based multiple access technology OFDMA is also used in several 4G and ... Loss of efficiency caused by cyclic prefix/guard interval. ... so that the sub- carriers are orthogonal to each othe...

OFDM: Principles and Challenges - Springer


Digital audio broadcasting (DAB) was the first commercial use of OFDM tech- ... Reducing the effect of ISI yields an easier equalization, which in turn means ...... scenario, the loss of orthogonality due to severe channel coding may diminish the.

OFDM definition (Phone Scoop)


OFDM. Orthogonal Frequency Division Multiplexing OFDM is a technology used ... to be transmitted quickly and reliably, with a minimum of loss or interference.

Orthogonal frequency divison multiplxing and its applications to wimax


Apr 24, 2015 ... Orthogonal really means at 18 OFDMA can be seen as an .... It is obvious that introducing CP causes loss of signal energy ... OFDM technology is also well positioned to meet future needs for mobile packet data traffics.

Orthogonal Frequency Division Multiplexing (OFDM)


By using time and frequency diversity, OFDM provides a means to transmit data in a frequency selective ... Rohling and Grunheid (1996) analyzed OFDM transmission technique in combination ..... in transmit power and little data rate loss.

LTE in a Nutshell: The Physical Layer - Telesystem Innovations

www.tsiwireless.com/docs/whitepapers/LTE in a Nutshell - Physical Layer.pdf

The OFDM technology is based on using multiple narrow band sub-carriers spread ... leads to at least a partial loss of orthogonality between sub-carriers. .... Element (RE) is the smallest defined unit which consists of one OFDM sub-carrier .

An introduction to Orthogonal Frequency Division Multiplexing (OFDM)


The technology we call OFDM in this report is usually viewed as a collection of transmis- ... a loss in signalstosnoise ratio (SNR), it is usually a small price to pay to .... Effectively this means that the cyclic prefix is removed in the receiver.

Tutorial on OFDM


IEEE802.11a, LTE, DVB) have adopted the OFDM technology as a mean to increase ... non-selective narrowband channels, which makes it robust against large delay spreads by preserving orthogonality ...... to loss of the carrier orthogonality.

Enhancement Orthogonal Frequency Division Multiplexing (OFDM ...

khaledelleithy.org/Conferences/CATA 2014 paper 74.pdf

the complexity of OFDM technology can be reduced and the capacity .... losing subcarriers orthogonality in OFDM system and that ... Simply means when OFDM.

Rapport professionnel - Coinchon


3.4.1 Definition ... Where do we meet OFDM technology nowadays, and in the future ? What are ..... This difference can be interpreted as a loss of orthogonality.

Helpful Resources

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 ...

Orthogonal Frequency-Division Multiplexing (OFDM): FAQ Tutorial


Apr 22, 2009 ... ... of multipath propagation that causes massive data errors and loss of signal in the microwave and UHF spectrum. Q: What are some of the wireless technologies that use OFDM? ... Orthogonal really means at a right angle to.

ICI Reduction Methods in OFDM Systems - InTech


Aug 23, 2011 ... This technology has been chosen as the transmission method of many standards , such as .... These components cause the loss of orthogonality of the OFDM ... defined as the ICI coefficient between l-th and k-th subcarriers, ...

Concepts of Orthogonal Frequency Division Multiplexing (OFDM ...


OFDM is based on the well-known technique of Frequency Division ... systems, the subcarriers will interfere with each other only if there is a loss of orthogonality.

DVB-T / OFDM - Institute for Communication Technologies and ...


OFDM and the orthogonality principle ... This means they both must assume exactly the same modulation frequency and the same time-scale for transmission  ...