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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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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 MIMO-OFDM systems heavily depends on the eigenvalues of the complex Wishart matrices defined for each OFDM subcarrier across frequency. In this chapter, we consider these variations over both Rayleigh and Rician fading channels. In particular, analysis for the differences between eigenvalues and between..................[:=> Show Contents <=:]



MIMO-OFDM-BASED AIR INTERFACE full report


Posted by: computer science topics
Created at: Monday 07th of June 2010 09:57:31 AM
Last Edited Or Replied at :Thursday 29th of December 2011 09:43:24 PM
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ltipath fading channel
Low-complexity multiple access schemes such as orthogonal frequency- division multiple access (OFDMA)
Disadvantages of OFDM systems are:
Higher peak-to-average power ratio (PAPR) compared to single-carrier modulation
Sensitivity to time and frequency synchronization errors
Undoubtedly, OFDM could be a potential air interface candidate
for future-generation mobile wireless systems.

MIMO

Multiple antennas can be used at the transmitter and receiver, now widely termed a MIMO system. A MIMO system takes advantage of the spatial diversity obtained by spati..................[:=> Show Contents <=:]



ofdm


Posted by: varunknp
Created at: Thursday 07th of January 2010 04:35:54 AM
Last Edited Or Replied at :Friday 08th of January 2010 06:00:47 AM
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need ppt..................[:=> Show Contents <=:]



OFDM on Mobile Data Communication


Posted by: shibin.sree
Created at: Monday 28th of December 2009 07:43:18 AM
Last Edited Or Replied at :Wednesday 20th of April 2011 11:02:37 PM
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s links, it is important that fast and efficient recovery schemes are implemented to get the correct data bits to the application. A combination of forward error correction (FEC) and fast acknowledgements (ARQ) satisfies this need. Powerful FEC is employed to dramatically reduce the bit error rate (BER), and ARQ is used to guarantee reliable delivery.
Third, data traffic encompasses a much different and wider range of services than voice. While voice can be considered a data service via Voice over Internet Protocol (VoIP), data services as a whole will span a much broader and more diverse ran..................[:=> Show Contents <=:]



High Speed OFDM Packet Access


Posted by: Computer Science Clay
Created at: Sunday 01st of March 2009 02:41:29 AM
Last Edited Or Replied at :Saturday 08th of December 2012 03:14:58 AM
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otally different air interface system with that of the W-CDMA.

The characteristics of HSOPA includes -:

· Utilizes 1.25 MHz to 20 MHz bandwidth compared with the 5MHz usage of W-CDMA.

· The upload and downlink transfer rates is 50 Mbps and 100Mbps and has a spectral efficiency of 2-4 times compared to 3GPP release 6.

· When compared with W-CDMA. Has a better latency time of around 20ms for round trip time from user terminal to RAN which is same as of a combined HSDPA/HSUPA system

The 3GPP LTE project by incorporating the HSOPA achieves the quadruple play ..................[:=> 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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ion. 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 OFDMA....................[:=> Show Contents <=:]



VTEC


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:59:36 AM
Last Edited Or Replied at :Wednesday 13th of February 2013 08:48:58 AM
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valve timing and lift control systems that were later designed by other manufacturers (VVTL-i from Toyota, VarioCam Plus from Porsche, and so on). It was invented by Honda's chief engine designer Kenichi Nagahiro...................[:=> Show Contents <=:]



VVT-i


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:59:05 AM
Last Edited Or Replied at :Saturday 20th of September 2008 11:59:05 AM
vvt i camcon , vvt i club, vvt i celica , vvt i corolla, vvt i car , vvt i camshaft, vvt i engine , vvt i dohc 16 valve, vvt i drawing , vvt i dyno, vvt i d4 , vvt i dohc decal, dohc vvt i decal , vvt i definition, vvt i diagram , vvt i decals, vvt i badges , toyota vvt i badge, 3sge vvt i beams engine , vvt i benefit, vvt i bmw , vvt i badge, camcon vvt i controller , vvt i controller, what does vvt i do , vvt i dohc, vvt i decal , vvt i actuator, VVT i ,
uding the Estima. Other Dual VVT-i engines will be seen in upcoming Toyota models, including a new ..................[:=> Show Contents <=:]



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