spread-spectrum sequence modulation
Comparative Analysis of Various Digital Modulation Techniques for FHSS WCDMA over AWGN and Fading Channels
... on spread spectrum technique which spreads the data using a ...PN sequence code or a Walsh ...discarded. Spread spectrum signals are highly resistant to interference and are very ...
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FHSS, DSSS, And Hybrid DS/FH Performance Evaluation For VSAT
... Direct Sequence Spread Spectrum, Frequency Hopping Spread Spectrum, and a hybrid approach between these two techniques DS/FH for the purpose of improving the efficiency of today's ...
5
Analysis of Simulation Parameters of Pulse Shaping FIR Filter for WCDMA
... direct sequence spread spectrum (DSSS) signal through the processing gain and the coding gain can be used to enable many DSSS signals to occupy the same channel bandwidth, provided that each signal ...
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Direct Sequence Spread Spectrum with Barker Code and QPSK
... used spread spectrum technique and explained in the next sectioIf we are really paranoid about being eavesdropped, we can take further steps to make signal difficult to ...DS modulation technique to ...
6
Using chaotic sequence in direct sequence spread spectrum based on code division multiple access (DS CDMA)
... disguising modulation as noise would easily made upon its random- like behavior [5]? Laxmi Bhat and Sudha in a study “states that the diverse applications of chaos to various areas are ...chaotic sequence ...
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Portable instrument for in-vivo infrared oxymetry using spread-spectrum modulation
... The microcontroller is interfaced to the two source connectors through two four- channel current boosters, specifically designed for direct interfacing to LED’s. The current boosters are switched on and off with the ...
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Spread Spectrum Sensing Techniques for Transformer Frequency Response Data
... channels, spread spectrum is proposed in the literature [3]. Spread spectrum can be defined as a modulation technique in which pseudo-random sequence is used in expanding the ...
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Performance Evaluation of DSSS and FHSS Using Modulation Technique
... in spread spectrum systems are longer than the codes used in other systems, as they are proposed for spreading of bandwidth rather than transmitting the ...All spread spectrum communication ...
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Overlapping M ary Frequency Shift Keying Spread Spectrum Multiple Access Systems using Random Signature Sequences
... multiple-access spread-spectrum communication system using binary frequency shift keying (BFSK) or M-ary frequency shift keying (MFSK) and noncoherent demodulation is ...a spread-spectrum ...
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BER Calculation for CDMA System Using PN & Gold Sequence
... of modulation index on bit error rate has been plotted for different modulation ...schemes. Spread Spectrum is a method of transmission in which the data sequence occupies a bandwidth ...
5
Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum
... hopping spread spectrum (FHSS) is a transmission technique where the carrier hops from frequency to ...popular modulation schemes, and also the hopping channel situations are ...
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Modeling and Simulation of CDMA Codes in Scilab
... Direct Sequence Code Division Multiple Access ...quadrature-phase modulation and the Gold Code Generator for Global Positioning System ...by spread spectrum ...
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Comprehensive Review on PN Sequence and their...
... Suzi Seroja Sarnin et. al. [2010] highlights in the paper ” Performance Study of BPSK and 8-PSK Using Cyclic Codes in CDMA Environment” the performance of BPSK and 8-PSK in Code Division Multiple Access (CDMA) ...
6
Effect of Length on Correlation of PN Sequence and Gold Sequence
... ABSTRACT: Spread spectrum modulation technique is different from the conventional communication ...Pseudo-random sequence is the basis of spread spectrum communication systems ...
5
Mitigationof Security Risk in Satellite Communication by using Turbo coded DSSS
... BPSK modulation in AWGN channel and result is compared in terms of BER and SNR ...direct sequence spread spectrum is applied with binary phase shift keying as the result shows there is ...
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Comparative Simulation & Analysis of 2- PSK Spreading Transceiver
... as spread-spectrum ...with spread spectrum makes this technology suitable for un-licensed band ...The spread spectrum transmitter first perform the BPSK symbol mapping using ...
5
Effect of length on Correlation of PN sequence and Gold sequence
... : Spread spectrum modulation technique is different from the conventional communication ...Pseudo-random sequence is the basis of spread spectrum communication systems intern ...
5
Implementing Multiple Security for Audio Steganography
... In spread spectrum technique [10][11], the original signal is first transformed to another domain using domain transformation techniques. The embedding technique can use any type of approach for example ...
5
DIFFERENT SPREADING SEQUENCES FOR PERFORMANCE COMPARISON OF DS-SS SYSTEM B Ch Kiran Patrudu*, D.Anil Prasad, B Ravi Kumar
... 64-QAM modulation techniques and from the simulation results it is found that bit error rate is increasing as the value of M increases ...M-QAM modulation using different spreading sequences (PN, Gold, ...
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Design of a direct sequence spread spectrum system for power line communication
... O'Neal, Jr., "Overview of Power Distribution Line Carrier Communications Systems," IEEE C;~obat. Telecommunications Conference, Nov[r] ...
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