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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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mance of the OFDM system.Keywords: OFDM; ICI; BER; ASIF; SSC
Orthogonal frequency division multiplexing (OFDM)technology has already been rapidly developed. OFDM hasalso been accepted for 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 o..................[:=> 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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multipath channel and radio non-linearity. Since most of these algorithms are coded in C or tools like Matlab, it is important to have a verification mechanism which ensures that the hardware implementation (RTL) is same as the C implementation of the algorithm. The flow is shown in the Figure.
5.1 Specifications of the OFDM transceiver
• Data rates to be supported
• Range and multipath tolerance
• Indoor/Outdoor applications
• Multi-mode: 802.11a only or 802.11a+HiperLAN/2
5.2 Design trade-offs
• Area - Smaller the die size lesser the chip cost
• Po..................[:=> 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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omain Windowing
This approach can be regarded as an improved version of the method using correlative coding, where the data samples of the tail subcarriers in an OFDM symbol are encoded with the data samples of the head ones in the same OFDM symbol, instead of being encoded with those of the subsequent OFDM symbol for the original approach. For low complexity, the modified correlative coding parameters are optimized through theoretical analysis. a demodulation algorithm which does not need prior information of the transmit sequence is also developed. Simulation results ..................[:=> 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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over frequency selective Rayleigh and Rician fading environments. In particular we focus on the eigenvalues of the complex Wishart matrices defined for each OFDM subcarrier and investigate their variation across frequency. Since the throughput and performance of such a system are heavily dependent on the eigenvalues, the results and analysis presented have many applications. Examples include the performance of beamforming systems which is governed by the maximum eigenvalue and the link gain which is characterized by the sum of the eigenvalues.

The throughput and performance of adaptive MIM..................[:=> 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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ition to bring the offset within the limits of the algorithm must be developed. A continuous symbol stream occurs in the applications such as digital audio broadcast. A second possibility is that OFDM communications such as digital radio. Here we envision that the session interval will include one or more repeated symbols.
The basic strategy for initial frequency offset acquisition, in either case, is to shorten the dft's and use larger carrier spacings such that the phase shift doesnot exceed +or - n. The frequency offset in Hz is 8=e/T=eAf where Af is the inter carrier spacing and T is the ..................[:=> 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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t and not at any other port. The crosstalk specification expresses how well a coupler maintains this port to port separations. A crosstalk of 20dB means that 1% of the signal appears at the unintended port.
Channel separation describes how well a coupler can distinguish wavelengths. In most couplers . the wavelengths must be widely separated. The limited number of channels for CWDM form the spectral requirements of a multi channel CWDM device. LED sources have wide spectral widths , which require each channel to be separated widely from the others. Constructing a CWDM device with many channel..................[:=> 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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carriers with low SNR.

The sinusoidal waveforms making up the tones in OFDM have the very
special property of being functions of a linear channel. This property
prevents adjacent tones in OFDM systems from interfacing with one
another, in the same manner that human ear can clearly distinguish
between each of the tones created by the adjacent keys of a piano. This
property and incorporation of a small amount of guard time to each
symbol, enables the orthoganolity between tones to be preserved of
multipath. This is what enables OFDM to avoid th..................[:=> Show Contents <=:]


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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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 interference. It can be considered as..................[:=> Show Contents <=:]

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