The communication needs of Earth observation satellites is steadily increasing. Within a few
years, the data rate of such satellites will exceed 1 Gbps, the angular resolution of sensors will be
less than 1 μrad, and the memory size of onboard data recorders will be beyond 1 Tbytes.
Compared to radio frequency links, optical communications in space offer various advantages
such as smaller and lighter equipment, higher data rates, limited risk of interference with other
communications systems, and the effective use of freque ....etc

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Abstract
Improved space“time coding for multiple-input and multiple-output orthogonal frequency division multiplexing is studied for wireless systems using QPSK modulation for four transmit and four receive antennas. A 256-state code is shown to perform within 3 dB of outage capacity (and within 2 dB with perfect channel estimation), which is better than any other published result without using iterative decoding. ....etc

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Overview of Wireless Data Communications

Abstract:
Overview of Wireless Data Communications(networking) Selecting the appropriate wireless data communication solution for connecting low-bandwidth electronic devices requires several considerations. These considerations may include range related issues, power requirements, 900 MHz versus 2.4 GHz transmission bands, interference immunity and time-to-market issues

Advantages of Cellular Networks
More capacity due to spectral reuse
Lower transmission pow ....etc

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RESOURCE ALLOCATION IN OFDMA WIRELESS COMMUNICATIONS SYSTEMS SUPPORTING MULTIMEDIA SERVICES- NETWORKING

We design a resource allocation algorithm for down-link of orthogonal frequency division multiple access (OFDMA) systems supporting real-time (RT) and best-effort (BE) services simultaneously over a time-varying wireless channel. The proposed algorithm aims at maximizing system throughput while satisfying quality of service (QoS) requirements of the RT and BE services. We take two kinds of QoS requirements into account. One is the require ....etc

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Presented By:
Kulbir Singh1, Vinit Grewal2 and Rajiv Saxena3
1ECED, Thapar University, Patiala, India,
2 National Institute of Technology, Jalandhar, India
3Jay Pee Institute of Engineering and Technology, Raghogarh, Guna , M.P., India


Abstract “
Wireless applications, particularly with multiple resonances, put new demands on antennas pertaining to size, gain, efficiency, bandwidth, and more. One promising approach in this regard is to use fractal geometries to find the best distribution of currents within a volume to ....etc

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A Paper Presentation on BLUETOOTH TECHNOLOGY IN WIRELESS COMMUNICATIONS
at
TECHFEST 2005
(A NATIONAL LEVEL TECHNICAL STUDENT PAPER PRESENTATION CONTEST)
Presented By
ARIF M. JEELANI P. SIVA NAGENDRA RAO
02481A0411 02481A0453
III / IV E.C.E
Gudlavalleru Engineering College,
Gudlavalleru.
Krishna district,
AP “ 521 356

Abstract:
Imagine the world with out wires and cables. Is this possible Yes this can be possible with the implementation of a new technology in wireless ....etc

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Fuzzy Logic Applications in Wireless Communications
Various areas pertaining to wireless communication systems utilize fuzzy logic. It is very much useful in modeling the problems in which all the inputs are not known or are impossible to obtain. The fuzzy logic can be easily applied to non-linear and time-variant systems and address the complex problems in this domain. Reduction in complexity and robustness can be achieved by the use of fuzzy logic. Human expert knowledge is incorporated into a rule-based framework by the fuzzy logic. ....etc

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Open Wireless Architecture - The Core to 4G Mobile
Communications


Abstract


Mobile communication is continuously one of the
hottest areas that are developing at a booming speed,
with advanced techniques emerging in all the fields of
mobile and wireless communications. Current times
are just the beginning for deploying 3G mobile
communication systems, while research on the next
generation of mobile communications, 4G wireless and
mobile networks begin to pave the way for the future.
This article studies the visions of 4G from ....etc

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Fuzzy Logic and Fuzzy Sets 


History


Lotfi Zadeh, at the University of California at Berkeley, first presented fuzzy logic in the mid-1960's.

Zadeh developed fuzzy logic as a way of processing data. Instead of requiring a data element to be either a member or non-member of a set, he introduced the idea of partial set membership.

In 1974 Mamdani and Assilian used fuzzy logic to regulate a steam engine.

In 1985 researchers at Bell laboratories ....etc

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