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Page Name: An Overview of Diversity Techniques in Wireless Communication Systems


Posted by: project ideas
Created at: Friday 10th of August 2012 06:10:38 AM
Last Edited Or Replied at :Friday 10th of August 2012 06:10:38 AM
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ificantly diminished. This phenomenon is called fading. The performance of a system (in terms of probability of error) can be severely degraded by fading.
Very often, especially in mobile communications, not only do multiple propagation paths exist, but they are also time-varying. The result is a time-varying fading channel. Communication through these channels can be difficult. Special techniques may be required to achieve satisfactory performance.



DIVERSITY TECHNIQUES

Diversity techniques can be used to improve system performance in fading channels. Instead of transmitting ..................==> [ Click Here to Read More ]



Page Name: IMPLEMENTATION OF CDMA TECHNOLOGY IN CELLULAR PHONES full report


Posted by: best presentation maker
Created at: Friday 04th of June 2010 06:40:40 AM
Last Edited Or Replied at :Wednesday 20th of April 2011 03:51:02 AM
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oded data. Each bit is repeated three times. These encoded bits are called symbols. The decoder at the receiver uses a majority logic rule. Thus, if an error occurs, the redundancy can help recover the lost information. Interleaving is a simple but powerful method of reducing the effects of burst errors and recovering lost bits.
6
In the example shown here the symbols from each group are interleaved (or scrambled) in a pattern that the receiver knows.
Burst errors:
A burst error is a type of error in received digital telephone signals. Burst errors occur in clumps of adjacent symbols...................==> [ Click Here to Read More ]



Page Name: TRAFFIC CONTROL ALGORITHMS FOR A MULTI ACCESS NETWORK SCENARIO COMPRISING GPRS


Posted by: seminar topics maker
Created at: Friday 02nd of April 2010 08:55:40 AM
Last Edited Or Replied at :Friday 02nd of April 2010 08:55:40 AM
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UMTS will manage both GSM (GPRS) and UMTS networks. Moreover, in the future co-operation among different operators
is envisaged, by means of legal agreements, in order, for example, to make a shared and optimized use of the spectrum resource. In this scenario also broadcast technology is expected to be involved into data delivery service.
Nowadays every radio access system is developed to exploit in the most efficient way the available resources to deliver its set of services, but if a multi-network system run by one operator is envisaged, the necessity of best exploiting the overall availa..................==> [ Click Here to Read More ]



Page Name: mobile communication full report


Posted by: best project report maker
Created at: Sunday 28th of February 2010 09:41:50 AM
Last Edited Or Replied at :Wednesday 06th of April 2011 01:52:57 AM
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isting GSM network.
2. GPRS is a general pocket radio service which is used such as a wireless internet and multimedia service. It is also known as GSM (INTERNET PROTOCOL)Because it will continue users directly to internet service provider.

SHORT MESSAGE SERVICE (SMS)

1. SMS is a bidirectional service for sending short alphanumeric (up to 160 bytes) messages in a store and forward fashion.
2. GSM Short Messages have a maximum length of 160 characters (from the SMS character set), or 140 octets. However, Short Messages can be concatenated to form longer messages.

GSM SYST..................==> [ Click Here to Read More ]



Page Name: Architecture Of g Mobile Communication


Posted by: sunil.p.gowda
Created at: Monday 22nd of February 2010 11:17:11 PM
Last Edited Or Replied at :Monday 22nd of February 2010 11:17:11 PM
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Page Name: Recent trends in electronics and communication


Posted by: swathiccet
Created at: Monday 01st of February 2010 03:22:46 AM
Last Edited Or Replied at :Saturday 01st of September 2012 10:03:02 AM
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I Need a PPT format..................==> [ Click Here to Read More ]



Page Name: smart antennas for wireless systems full report


Posted by: new technology thinker
Created at: Tuesday 26th of January 2010 12:19:46 PM
Last Edited Or Replied at :Friday 20th of January 2012 11:06:37 PM
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nment is changing rapidly, the later reason decreases the algorithm dependency on a specific air interface. Applications in Mobile Communications: A space-time processor (â„¢smart Ëœantennaâ„¢) is capable of forming transmit/receive beams towards the mobile of interest. At the same time it is possible to place spatial nulls in the direction of unwanted interferences. This capability can be used to improve the performance of a mobile communication system Increased antenna gain The â„¢smartâ„¢ antenna forms transmit and receive beams. Therefore, the â..................==> [ Click Here to Read More ]



Page Name: global system for mobile communication full report


Posted by: new technology thinker
Created at: Saturday 23rd of January 2010 01:31:33 AM
Last Edited Or Replied at :Friday 06th of July 2012 11:21:14 PM
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GLOBAL SYSTEM
FOR
MOBILE COMMUNICATION

Definition:
Global system for mobile communication (GSM) is a globally accepted
standard for digital cellular communication. GSM is the name of a
standardization group established in 1982 to create a common European
mobile telephone standard that would formulate specifications for a
pan-European mobile cellular radio system operating at 900 MHz. It is
estimated that many countries outside of Europe will join the GSM
partnership.
1. Introduction: The Evolution of Mobile Telephone Systems
Cellular is one of th..................==> [ Click Here to Read More ]



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