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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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tion method. Simulation results showthat the technique proposed in this paper can effectively improveBER (Bit Error Rate) performance of the OFDM system.Keywords: OFDM; ICI; BER; ASIF; SSC
I. INTRODUCTION
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 t..................[:=> 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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e 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
• Power - Low power crucial for battery operated mob..................[:=> 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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dual carrier is easily separated. When there is a frequency offset the Orthogonality is lost because now the spectral does not coincide with the peak of the individual carriers. So some power of the side lobes exists at the center of the individual carriers which is called ICI power. The ICI power will go on increasing as the frequency offset increases. The purpose of pulse shaping is to reduce the side lobes. If we can reduce the side lobes significantly we then the ICI power will also be reduced.
2.2.4 ICI Self Cancellation
ICI self –cancellation is a scheme that was introduced b..................[:=> 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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e variation of eigenvalues and eigenvalue sums across the frequency bins of a MIMO OFDM system. In particular, we consider the changes in the ordered eigenvalues and the eigenvalue sum or link gain, between two distinct frequency bins. The size of such changes has an important effect both on system performance and design. In addition these results have applications in other areas, including temporal variation, feedback delay and channel estimation. Novel results presented include distributions and moments for changes in link gain and the maximum eigenvalue and autocorrelation functions for the..................[:=> 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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in many communications systems such us: ADSL, Wireless LAN, DAB, DVB, UWB and PLC.
Characteristics:
An OFDM baseband signal is the sum of a number of orthogonal sub-carriers, with data on each sub-carrier being independently modulated commonly using some type of quadrature amplitude modulation (QAM) or phase-shift keying (PSK). This composite baseband signal is typically used to modulate a main RF carrier.
The benefits of using OFDM are many, including high spectrum efficiency, resistance against multipath interference (particularly in wireless communications), and ease of filtering ..................[:=> 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 01 i i(aim:s
NAME OF FIGURE PAGE NO:
PROPAGATION OF FDM 6
PROPAGATION OF WDM 6
CHANNEL SPACING IN DWDM 8
PROPAGATION OF CWDM 11
1 INTRODUCTION
In the modern communication systems, we use the optical fiber as the medium because it has many advantages. The security is the main advantage of optical fiber communication. The loss occurred in this communication is very less than that in ordinary copper wire transmission.
Inorder to transmit the information or messages^ we have to multiplex them. In optical communication system we commonly use the wavelength division multiplexing. Wavelengt..................[:=> 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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ER
Equalizer removes the channel distortion and the prewhitening. The W-
OFDM vectors is multiplied by the pre-computed channel estimation.
DEMODULATOR
The W-OFDM symbol is converted back into a block of bits. Each carrier
is converted back to bits based on the modulation technique.
DECODER
The decoder detects and corrects bits in error producing the original
block of bits. It ignores bits that were on carriers with low SNR.

THEORY OF OFDM OPERATION
The sinusoidal waveforms making up the tones in OFDM have the very
special property of being functions of a linear channel. ..................[:=> 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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ed communication such as multipath fading and RF noise interference. It can be considered as multiple access technique OFDMA....................[:=> Show Contents <=:]



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