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Time Division Multiple Access


Posted by: computer science crazy
Created at: Tuesday 07th of April 2009 01:06:43 PM
Last Edited Or Replied at :Tuesday 07th of April 2009 01:06:43 PM
multiple access cards, multiple access cellular communication , multiple access ca corp, multiple access collision avoidance , multiple access corporation, multiple access channel , multiple access control, carrier sense multiple access collision detection , code division multiple access cdma, multiple access communications , Multiple Access, Access , Multiple, Division , Time, time division multiple access ,
he criminal cell phone cloning that was popular at the time by encrypting the signal it's wireless signal.

The primary benefit for wireless users of the era was dramatically increased call quality over the scratchy, frequently garbled or under water sounds that analog users had become accustomed to. All manufacturers produced TDMA handsets during this period of time, but Nokia's ubiquitous model 5165 is probably the most popular example of TDMA technology.TDMA was replaced by GSM to permit the use of advanced, data intensive features such as text messaging and picture messaging, and to al..................[:=> Show Contents <=:]



Orthogonal Frequency Division Multiplplexing


Posted by: Computer Science Clay
Created at: Sunday 01st of March 2009 02:17:56 AM
Last Edited Or Replied at :Sunday 01st of March 2009 02:17:56 AM
Multiplplexing , Division, orthogonal frequency division multiplexing ofdm tutorial and analysis , orthogonal frequency division multiplexing ppt, orthogonal frequency division multiplexing tutorial , orthogonal frequency division multiple access ofdma, orthogonal frequency division multiplexing for wireless communications , orthogonal frequency division multiple access, orthogonal frequency division multiplexing , orthogonal frequency coding, variable spreading factor orthogonal frequency and code division mu ,
spectrum efficiency that encourage their use in untethered broadband communications. OFDM is a multi carrier modulation technique with densely spaced sub carriers that has gained a lot of popularity among the broadband community in the last few years. It has found immense applications in communication systems. This report is intended to provide a tutorial level introduction to OFDM Modulation, its advantages and demerits, and some applications of OFDM.

History Of OFDM
The concept of using parallel data transmission by means of frequency division multiplexing (FDM) was published in mid 60s...................[:=> Show Contents <=:]



Time Division Multiple Access TDMA


Posted by: Computer Science Clay
Created at: Saturday 28th of February 2009 11:32:20 PM
Last Edited Or Replied at :Saturday 28th of February 2009 11:32:20 PM
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model 5165 is probably the most popular example of TDMA technology.TDMA was replaced by GSM to permit the use of advanced, data intensive features such as text messaging and picture messaging, and to allow an even more efficient use of bandwidth...................[:=> Show Contents <=:]



Frequency Division Multiple Access FDMA


Posted by: computer science crazy
Created at: Sunday 15th of February 2009 01:15:02 AM
Last Edited Or Replied at :Sunday 15th of February 2009 01:15:02 AM
FDMA, Access , Multiple, Division , Frequency,
nel pair. For example, if a FDMA system had 200 channels, the system could handle 100 simultaneously full duplex conversations. (100 channels for transmitting and 100 channels for receiving) Example: FDMA channel With FDMA users share the transponder by prior allocation of individual channels. Single Channel Per Carrier (SCPC) is an FDMA scheme in which the input data stream is used to modulate an RF (radio frequency) carrier and assign dedicated carrier frequency to each client.

Frequency Division Multiple Access system for cellular radio. Frequency Division Multiple Access The analog com..................[:=> Show Contents <=:]



Code Division Multiple Access CDMA


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 01:00:16 AM
Last Edited Or Replied at :Tuesday 07th of February 2012 04:35:55 AM
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ccess (CDMA) is a modulation and multiple-access scheme based on spread-spectrum communication. In this scheme, multiple users share the same frequency band at the same time, by spreading the spectrum of their transmitted signals, so that each user's signal is pseudo-orthogonal to the signals of the other users.

CDMA Signals
In a CDMA system, each signal consists of a different pseudorandom binary sequence (called the spreading code) that modulates a carrier, spreading the spectrum of the waveform. A large number of CDMA signals share the same frequency spectrum. If CDMA is viewed in eithe..................[:=> Show Contents <=:]



Frequency Division Multiple Access FDMA


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:53:54 AM
Last Edited Or Replied at :Sunday 21st of September 2008 12:53:54 AM
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r radio.
Frequency Division Multiple Access The analog communications technique that uses a common channel for communication among multiple users allocating unique time slots to different users.
The process of dividing bandwidth into multiple frequencies wh..................[:=> Show Contents <=:]



Time Division Multiple Access TDMA


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:37:42 AM
Last Edited Or Replied at :Sunday 21st of September 2008 12:37:42 AM
TDMA, Access , Multiple, Division , Time, tdma project report ,
replaced by GSM to permit the use of advanced, data intensive features such as text messaging and picture messaging, and to allow an even more efficient use of bandwidth...................[:=> Show Contents <=:]



wide band code division multiple access


Posted by: lini555
Created at: Monday 22nd of March 2010 12:00:34 AM
Last Edited Or Replied at :Wednesday 01st of June 2011 12:23:58 AM
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i want exactly on wide band code division..................[:=> Show Contents <=:]



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