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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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on.Although multi-path propagation and frequency-selectivefading exist in radio channels, OFDM is
very robust to radiochannel impairments. The receiver design is also simplifieddue to less complex
equalization, and OFDM systems havehigh spectral efficiency due to overlapping sub-carrier
spectra.However, one of the major disadvantages of such a multicarriermodulated system is the
sensitivity of its performance tofrequency or phase offsets. Frequency offsets can result from
aDoppler shift due to a mobile environment, as well as from acarrier frequency synchronization
error. Such frequency offse..................[:=> 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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bes the VLSI implementation of OFDM in details. Specifically the 802.11a OFDM system has been
considered in this paper. However, the same considerations would be helpful in implementing any OFDM
system in VLSI.OFDM is fast gaining popularity in broadband standards and high-speed wireless
LAN.1. Introduction OFDM is a multi-carrier system where data bits are encoded to multiple sub-carriers. Unlike single carrier systems, all the frequencies are sent simultaneously in time. OFDM offers several advantages over single carrier system like better multi-path effect immunity, simpler chan.................. [:=> 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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ubcarrier spacing exactly the reciprocal of the symbol period. The figure below shows the frequency
shifts thus changing the subcarrier spacing which results in the loss of orthogonality. This loss of
orthogonality creates interference among the signals which is called as ICI. Since the subcarriers
in OFDM are usually very narrow hence the OFDM system becomes very sensitive to ICI. ICI destroys
the orthogonality of the OFDM system which is overcome by the use of cyclic prefix mechanism.2.2 different types of ICI cancellation schemes:2.2.1Frequency Domain Equalization Frequency doma.................. [:=> 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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ting over frequency selective Rayleigh fading environments. Using the results in , here we develop
analysis for calculating the LCR of BER in an adaptive MIMO-OFDM system which may use multiple
eigenvalues. The results presented in this paper provide new insights into the BER analysis of an
adaptive system. It is worth reiterating that we focus on BER as a process in frequency across the
OFDM block. Hence we consider variations in BER across the bins and not over time. In particular, we
consider each eigenmode as a random process in the frequency domain and compute the LCR for the BER
of tr..................[:=> 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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the method of modulation. There are two deleterious effects caused by frequency offset; one is the
reduction of signal amplitude in the output of signal amplitude in the output of the filters matched
to each of the carriers and the second is introduction of ICI(intercarrier interference) from the
other carriers which are no longer orthogonal to the filter. Because, in OFDM, the carriers are
inherently closely spaced in frequency compared to the channel bandwidth, the tolerable frequency
offset becomes a very small fraction of the channel bandwidth. Maintaining sufficient open loop
frequency a..................[:=> 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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n couplers i 1. Wavelength division MUX & DEMUX Multiplexers or combiners mix or combine optical signals with different wavelength in a way that allows them to all pass through a single optical fiber without interfering with one another. Demultiplexers or splitters separate signals with different wavelengths in a manner similar to the way filters separate electrical signals of ! different frequencies. Wavelength demultiplexes have as many outputs as there are j ! wavelengths, with each output going to a different destination. Multiplexes and ; demultiplexes are at the terminal ends of opt.................. [:=> 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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adjusting the tones phase, amplitude or both. In addition to high speed wireless application wired systems such as asynchronous digital subscriber line (ADSL) and cable modem utilized. OFDM as its underlying technology to provide a method of delivering high speed data. OFDM has also been adopted into several European wireless communications such as digital video broadcast and terrestrial digital video broadcast. BIBLIOGRAPHY 1. Justin chuang ,Leonard j.cimini. IEEE Communications Magazine. November 2001. 2. Des Brisay, Greg. Basics of orthogonal FDM 3. Welling, Keit.................. [:=> 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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divides the communication channel into a number of equally spaced frequency bands. A sub carriers a
portion of the users information in each band. Each sub carriers is orthogonal (Independent of each
other) with every other sub carrier. OFDM efficiently squeezes multiple modulated carriers tightly
together reducing the required bandwidth.OFDM was invested in 1960?s, only recently it has
recognized as an excellent method for bi-directional wireless data communication. It is extremely
efficient in mitigating common problems in high-speed communication such as multipath fading and RF
noise interf..................[:=> Show Contents <=:] |

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