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## An Intercarrier Interference Cancellation Technique Based on SSC-ASIF Scheme in OFDMPosted by: seminar class Created at: Wednesday 04th of May 2011 04:21:19 AM Last Edited Or Replied at :Wednesday 04th of May 2011 04:21:19 AM | An Intercarrier Interference Cancellation Technique Based on SSCASIF Scheme in OFDM ,
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ncyoffset estimation and compensation technique , and Dopplerdiversity . Although the ICI
self-cancellation scheme is avery simple way for suppressing ICI in OFDM systems, itresults in
seriously loss of bandwidth. However, the methods ofother schemes are complex .This paper still
focuses on the ICI cancellation scheme andits effect on OFDM communication systems, and presents
anICI cancellation scheme. Its main idea is that the symbol shiftcancellation (SSC) method is used
to cancel the impact of ICIon the far sub-carriers, and then the adjacent sub-channelinterference
filter (ASIF) me..................[:=> Show Contents <=:] | |||

## Abstract OFDM is a multi-carrier system where data bits are encoded to multiple subPosted by: seminar class Created at: Monday 11th of April 2011 04:40:30 AM Last Edited Or Replied at :Monday 11th of April 2011 04:40:30 AM | abstract for ofdm,
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isition constraints. But it is more susceptible to local frequency offset and radio front-end
non-linearities. The frequencies used in OFDM system are orthogonal. Neighboring frequencies with overlapping spectrum can therefore be used. This property is shown in the figure where f1, f2 and f3 orthogonal. This results in efficient usage of BW. The OFDM is therefore able to provide higher data rate for the same BW. 2. OFDM TransceiverEach sub-carrier in an OFDM system is modulated in amplitude and phase by the data bits. Depending on the kind .................. [:=> Show Contents <=:] | |||

## Intercarrier Interference Compression in OFDM Communication Systems by Using CorrelatPosted by: seminar class Created at: Thursday 24th of February 2011 11:08:28 PM Last Edited Or Replied at :Thursday 24th of February 2011 11:08:28 PM | Intercarrier Interference Compression in OFDM Communication Systems by Using Correlat ,
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nformation transfer speed, the time for each transmission necessarily becomes shorter. Since the
delay time caused multipath, remains constant , ISI becomes a limitation in high data rate
communication. Hence, OFDM is especially suitable for high speed communication due to its resistence to ISI as it avoids yhis problem by sending many low speed transmission simultaneously. In practice each OFDM channel consists of 128 to 2048 sub-carriers and can occupy bandwidth from 1.25 MHz to 20MHz. in addition each of these sub-carriers is modulated using BPSK , QPSK or 64 QAM modulation depend.................. [:=> Show Contents <=:] | |||

## Frequency Variation of Adaptive MIMO OFDMPosted by: seminar surveyer Created at: Tuesday 05th of October 2010 01:28:11 AM Last Edited Or Replied at :Tuesday 05th of October 2010 01:28:11 AM | power frequency variations ,
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MIMO-OFDM channel. .................. [:=> Show Contents <=:] | |||

## Orthogonal Frequency Division Multiplexing Frequency Offset Correction full reportPosted by: project topics Created at: Sunday 25th of April 2010 11:46:50 PM Last Edited Or Replied at :Thursday 18th of August 2011 01:30:07 PM | orthogonal frequency division multiplexing definition ,
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/T=eAf where Af is the inter carrier spacing and T is the symbol interval. Let us assume that the
initial frequency offset is not greater than + or-5max. Then Af initial>2Smax determines the minimum initial carrier spacing, and the corresponding dft lengths. If the average power of the shortened symbols is kept the same, the variance of the estimate of einitial will be larger than for the longer data symbols,since it estimates the fraction of carrier spacing, corresponds to a proportionately larger fractional offset for the longer data symbols. However, the MLE estimate is so accurate that i.................. [:=> Show Contents <=:] | |||

## CWDM Coarse Wavelength Division Multiplexing full reportPosted by: project report tiger Created at: Thursday 04th of March 2010 03:56:48 AM Last Edited Or Replied at :Tuesday 26th of October 2010 03:06:35 AM | dwdm bandwidth,
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gth separation is approximately 0.8nm. Using a multiplexing technique called DWDM , the spacing
between adjacent frequencies is considerably less. So WDM systems carrying multiple optical signals
in the vicinity of 1550nm with less than 200GHz are considered DWDM. Obviously , the more
wavelengths used in a WDM system . the closer they are to each other and the more dense the
wavelength spectrum. Figure (3.4) shows the channel separation in DWDM systems. Ideally the port should transmit all the light at the centre of the optical channel, and no light outside. As usual , reality is a compromise.................. [:=> Show Contents <=:] | |||

## wideband ofdm full reportPosted by: computer science technology Created at: Friday 22nd of January 2010 07:02:26 AM Last Edited Or Replied at :Sunday 17th of July 2011 11:56:58 PM | wideband delphi estimation process ,
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rence due to multipath delays by incorporating a cyclic prefix. FFT The FFT block transforms the W-OFDM symbol from the time to the frequency domain. SYNCHONIZATION For synchronization, a direct sequence (DS) spread spectrum signal is used. The OFDM receiver recovers the gain and frequency error information from the synchronization message. CHANNEL ESTIMATION The amplitude and phase distortion caused during transmission is determined by comparison of the original known signal with the OFDM signal. EQUALIZER Equalizer removes the channel distortion and the prewhiteni.................. [:=> Show Contents <=:] | |||

## WIDEBAND OFDMPosted by: computer science crazy Created at: Sunday 21st of September 2008 01:13:47 PM Last Edited Or Replied at :Thursday 01st of April 2010 04:15:58 AM | ofdm books ,
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DMA....................[:=> Show Contents <=:] |

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