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An Intercarrier Interference Cancellation Technique Based on SSC-ASIF Scheme in OFDM


Posted 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
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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) method is used to cancel the impactof ICI on the adjacent sub-carriers interference. By processingso, the effect of ICI on the OFDM system is reduced aspossible, and its bandwidth efficiency has rare loss.In this paper, a new ICI cancellation scheme and itsar..................[:=> Show Contents <=:]



Abstract OFDM is a multi-carrier system where data bits are encoded to multiple sub


Posted 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
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representation will be more efficient. Further in fixed point a choice can be made between signed and 2's complement representation.
The width of representation need not be constant throughout the Baseband and it depends on the accuracy needed at different points in transmit or receive path. A small change in the number of bits in the representation could result in a significant change in the size of arithmetic circuits especially multipliers.
Shown below is the loss of SNR because of decrease in the width of representation.
6.2 Simulation setup
The algorithms could be simulated ..................[:=> Show Contents <=:]



Intercarrier Interference Compression in OFDM Communication Systems by Using Correlat


Posted 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
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nalty is only a slight increased in the computational complexity at the receiver.
2.2.3 Pulse Shaping
As we have seen in the OFDM spectrum that each carrier consist of a main lobs followed by a number of side lobes with reducing amplitude. As long as Orthogonality is maintained there is no interference among the carriers because at the peak of the every carrier, there exists a spectral null. That is at that point the component of all other carrier is zero. Hence the individual carrier is easily separated. When there is a frequency offset the Orthogonality is lost because now..................[:=> Show Contents <=:]



Frequency Variation of Adaptive MIMO OFDM


Posted 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
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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 variat..................[:=> Show Contents <=:]



Orthogonal Frequency Division Multiplexing Frequency Offset Correction full report


Posted 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
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k=-K
For Ie1-eI<<1/2n, the tangent can be approximated by its argument so that
e1-e~
K/
k=-K
K
ZRe(R1k+W2ke- 2nje)(R*1k+W*1k)]
k=-K
At high signal to noise ratios, a condition compatible with successful communications signaling, may be approximated by
K
e1-e~ /
k=-K
K
k=-K
From which we find that E=0.
Therefore, for small errors the estimate is conditionally unbiased. The conditional variance of the estimate is easily determined for above equa..................[:=> Show Contents <=:]



CWDM Coarse Wavelength Division Multiplexing full report


Posted 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
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th separation used with WDM is analogous to analog radio channel frequencies.
3.3a
Comparison between FDM & WDM
Although frequency and wavelength division
I multiplexing share similar principles, they are not the same. The most obvious difference is ; that optical frequencies are much higher than radio frequencies. Probably the most difference however, is in the way the two signals propagate through their respective transmission media. :,With FDM, information signals with the same bandwidth from multiple sources modulate ! different frequencies, with each frequency having its own modulatio..................[:=> Show Contents <=:]



wideband ofdm full report


Posted 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
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f each including the need for TDMA
frequency planning and multiple access interference in the case of
CDMA.
W-OFDM SYSTEM ARCHITECTURE

Fig2 shows the processing blocks of the W-OFDM.

Encoder
The encoder prepares the bits so that the decoder can correct the
errors that may occur during transmission. The bits entering the
encoder are grouped into bocks.
Modulator
The modulator transforms the encoded block of bits into a vector of
complex values which is the W-OFDM symbol in the frequency domain.
Groups of bits are mapped onto a modulation constellation producing a ..................[:=> Show Contents <=:]



WIDEBAND OFDM


Posted 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
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ique OFDMA....................[:=> Show Contents <=:]



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