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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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the next generation wirelesscommunication systems, such as B3G, Wimax and so 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..................[:=> 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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an exhaustive floating point and fixed-point library. SPW also provides feature to plug-in RTL modules and do a co-simulation of SPW system and Verilog. This helps in verifying the RTL implementation of algorithms against the SPW/C implementation.
..................[:=> 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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row 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 domain equalizers (FEQs) have been applied extensively in multicarrier systems to enhance transmission rate by reducing transmit redundancy in the form of guard interval. The proposed equalization algorithm is able to remove intersymbol and intercarrier interference (ISI and ICI) incurred by the reduction or the absence of this re..................[:=> 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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ults including the joint PDF of the maximum eigenvalue in two frequency bins, the ACF of the maximum eigenvalue, the distribution and variance of the difference between the two maximum eigenvalues.
- Link gain results including the PDF, the CDF and variance of the link gain difference, and the ACF of the link gain.
-Simple approximations to the ACF of the maximum eigenvalue and to the variance of the maximum eigenvalue difference.

The second part of this paper focuses on the level crossing rates (LCRs) of BERs across the frequency bins of a MIMO-OFDM system operating over frequency sel..................[:=> 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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o sometimes called as discrete multitone modulation (DMT). It is better than CDMA in high bit rate and Broadband Communications .It is a multi carrier technique, which is very sensitive to Frequency Offset between transmitter and receiver. This paper discusses the effects of frequency offset on the performance of OFDM digital communications. The main problem with frequency offset is that it introduces interference among multiplicity of carriers in the OFDM signal. It is shown that to maintain signal to interference ratios of 20 dB or greater for the OFDM carriers, offset is limited to 4% or le..................[:=> 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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PAGE NO:
INTRODUCTION I
MULTIPLEXING 2
MULTIPLEXING TECHNIQUES 3
Frequency division multipIexing(FDM)
Time division multiplexing (TDM) 4
Wavelength division multiplexing (WDM)
Comparison between FDM & WDM 5
Dense wavelength division multiplexing (DWDM)
Advantages of DWDM 9 j
Disad\outages of DWDM
Coarse wavelength division multiplexing^ WDM) 10
CWDM CIRCUIT COMPONENTS 12
AMPLIFICATION OF OPTICAL SIGNALS 14
Erbium doped fiber amplifiers Advantages of EDFAs
Optoelectronic amplifiers 15
ADVANTAGES OF CWDM 16
CONCLUSION 17
REFERENCES 18
LIST 01 i i(aim:s
NAME OF FIGURE PAGE NO..................[:=> 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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urity. The W-OFDM symbol is multiplied by a
vector of complex value, R that is known to the transmitter and
receiver. There are many vectors that can be used for, R and different
R can be used for each W-OFDM symbol; thus this stage can be used as a
level of security.
IFFT
The IFFT processing blocks transforms the W-OFDM symbol from the
frequency to the time domain. It prepares the time domain W-OFDM
symbol for transmission. The vector is cyclically intended to reduce
the effects of intersymbol interference at the receiver as shown in
Fig.3

Figure 3 W-OFDM solves ..................[:=> 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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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 interference. It can be considered as multiple access technique..................[:=> Show Contents <=:]



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