A High Data Rate Frequency Hopping Modulation Scheme
Theme:ECE/Digital Communications

Submited By:
Hemanth Patnala
R.V.Seshu Kumar
Sir C.R.R. College Of Engineering,
Eluru-534002
ABSTRACT
There is a need to select the 'first step up' modulation scheme for higher data rate frequency hopping systems. This is seen as one step in a longer journey where considerably higher data rates are used. In order to make this progression viable, the first step should be taken with a well proven modulation scheme. An ....etc

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WHAT IS A SMART DUST
Autonomous sensing and communication in a cubic millimeter

Berkeley s Smart Dust project, led by Professors Pister and Kahn, explores the limits on size and power consumption in autonomous sensor nodes. Size reduction is paramount, to make the nodes as inexpensive and easy-to-deploy as possible. The research team is confident that they can incorporate the requisite sensing, communication, and computing hardware, along with a power supply, in a volume no more than a few cubic millimeters, while sti ....etc

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LOYOLA INSTITUTE OF TECHNOLOGY & MANAGEMENT
Department of Electronics and Communication Engineering
Technical Seminar on

GMSK DEMODULATOR USING COSTAS LOOP FOR SOFTWARE-DEFINED RADIO

ABSTRACT

DSP based implementation of Gaussian Minimum Shift Keying (GMSK) demodulator using Costas loop has been described. The demodulator consists of a Costas loop for carrier recovery, data recovery, and phase detection. For low data rates, we have tested the scheme on a TI s DSP TMS-320C6713. These are imple ....etc

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Orthogonal Frequency Division Multiplplexing

Multi Carrier Modulation is a technique for data transmission by dividing a high bit rate data stream is several parallel low bit ]rate data streams and using these low bit rate data streams to modulate several carriers. Multi Carrier Transmission has a lot of useful properties such as delay spread tolerance and spectrum efficiency that encourage their use in untethered broadband communications. OFDM is a multi carrier modulation technique with densely spaced sub carriers tha ....etc

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Orthogonal Frequency Division Multiplplexing

Multi Carrier Modulation is a technique for data transmission by dividing a high bit rate data stream is several parallel low bit ]rate data streams and using these low bit rate data streams to modulate several carriers. Multi Carrier Transmission has a lot of useful properties such as delay spread tolerance and spectrum efficiency that encourage their use in untethered broadband communications. OFDM is a multi carrier modulation technique with densely spaced sub carriers tha ....etc

[:=Read Full Message Here=:]

Orthogonal Frequency Division Multiplexing


1. INTRODUCTION
1.1. Introduction:-
Orthogonal Frequency Division Multiplexing (OFDM) is one of the latest modulation techniques used in order to combat the frequency-selectivity of the transmission channels, achieving high data rate without inter symbol interference. The basic principle of OFDM is gaining a wide spread popularity within the wireless transmission community. Furthermore,
OFDM is one of the main techniques proposed to be employed in ....etc

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Having looked at the concepts behind the superheterodyne receiver it is helpful to look at a block diagram of a basic superhet. The superheterodyne block diagram is relatively straightforward and builds on the basic functional block used to convert the incoming frequency down to a fixed intermediate frequency stage.

While there may be some simplified versions for a superheterodyne block diagram, each receiver will be different as a result of the differing requirements for each receiver. However the basic principles are the same, and many super ....etc

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Orthogonal Frequency Division Multiplplexing

Multi Carrier Modulation is a technique for data transmission by dividing a high bit rate data stream is several parallel low bit ]rate data streams and using these low bit rate data streams to modulate several carriers. Multi Carrier Transmission has a lot of useful properties such as delay spread tolerance and spectrum efficiency that encourage their use in untethered broadband communications. OFDM is a multi carrier modulation technique with densely spaced sub carriers tha ....etc

[:=Read Full Message Here=:]

LOYOLA INSTITUTE OF TECHNOLOGY & MANAGEMENT
Department of Electronics and Communication Engineering
Technical Seminar on

GMSK DEMODULATOR USING COSTAS LOOP FOR SOFTWARE-DEFINED RADIO

ABSTRACT

DSP based implementation of Gaussian Minimum Shift Keying (GMSK) demodulator using Costas loop has been described. The demodulator consists of a Costas loop for carrier recovery, data recovery, and phase detection. For low data rates, we have tested the scheme on a TI s DSP TMS-320C6713. These are imple ....etc

[:=Read Full Message Here=:]

Orthogonal Frequency Division Multiplplexing

Multi Carrier Modulation is a technique for data transmission by dividing a high bit rate data stream is several parallel low bit ]rate data streams and using these low bit rate data streams to modulate several carriers. Multi Carrier Transmission has a lot of useful properties such as delay spread tolerance and spectrum efficiency that encourage their use in untethered broadband communications. OFDM is a multi carrier modulation technique with densely spaced sub carriers tha ....etc

[:=Read Full Message Here=:]

PEER TO PEER CLUSTERING AND NETWORK SECURITY IN ADHOC
SMART SPACES
Presented By:
Dr. S.Arumugam 1
N.Radhika 2
Additional Director, Directorate of Technical Education, Chennai, India
Research Scholar, Government College of Technology, Coimbatore, India


ABSTRACT
Smart spaces are composed of smart and dummy nodes
which act as the source for providing service. A large
number of cluster groups are formed in the smart space.
Some of these smart spaces are mobile, some are Adhoc
and others are sensor ....etc

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please tell about concepts of spread spectrum communication coded bpsk and dpsk demodulators.. ....etc

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