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Multi Carrier systems like OFDM has the problem of Inter Carrier Interference(ICI), which results from the loss of Orthogonality between the sub carriers.This happens when the FFT is considered over duration where the subcarrier is non integer number of cycles, which would be the case when multipath is present and the guard time has amplitude is zero.This is reduced by use of cyclic prefix, where we transmit a copy the last part of the symbol followed by the symbol itself.This ensures Orthogonality over the FFT period in case of delayed multipath.
yup...that's all from me.
Regards
Girish .V.V
There are many methods to reduce ICI not only CP like Frequency domain equalization,Time domain windowing,Pulse shaping,Maximum likelihood estimation,Extended kalman filtering and ICI self cancellation.And any one have their own advantages.
Naser
What else can I help you with?
How you eliminate inter symbol interference in ofdm?
Inter symbol interference (ISI) in OFDM systems can be minimized by using a cyclic prefix. This involves adding a copy of the end of each OFDM symbol to the beginning before transmission. The cyclic prefix helps to mitigate the effects of multipath fading and reduces ISI by allowing the receiver to separate the OFDM symbols with a guard interval.
What is SISO-OFDM?
SISO-OFDM is an OFDM system with one transmit and one receive antenna.
How do you you say here in French?
here is 'ici' in French.
What is crest factor in ofdm?
Crest factor in Orthogonal Frequency-Division Multiplexing (OFDM) refers to the ratio of the peak power of a signal to its average power. It is a critical parameter because OFDM signals typically exhibit high peak-to-average power ratios (PAPR), which can lead to nonlinear distortion in amplifiers and affect overall system performance. A higher crest factor can necessitate more robust (and often costly) power amplifiers to handle the peaks without distortion. Managing crest factor is essential for optimizing the efficiency and reliability of OFDM systems.
What does ici mean in french?
(fr)ici=(en)here
How many sub channels does OFDM use for carrying data?
OFDM uses 48 subchannels for data and 4 are used as Pilot Carriers.
When was ICI Pakistan created?
ICI Pakistan was created in 1952.
When was Ici Paris created?
Ici Paris was created in 1941.
When was ICI House created?
ICI House was created in 1958.
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.
Explain architecture of Distributed Database systems Also explain the reasons for building distributed database systems?
1 Explain architecture of Distributed Database systems? Also, explain the reasons for building distributed database systems?
What is 'ofdm'?
Orthogonal frequency-division multiplexing
