spread spectrum-frequency hopping technique
Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum
... Frequency hopping spread spectrum is a transmission technology used in wireless networks and a technique to generate spread spectrum by hopping the carrier fre- ...
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A Review on Frequency Hopping Spread Spectrum Based Anti Jamming Improvement With Encrypted Spreading Codes
... many technique are developed for anti-jamming improvement but my attention on Frequency hopping spread spectrum anti-jamming improvement with Encrypted spreading ...This ...
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Comparative Analysis of Various Digital Modulation Techniques for FHSS WCDMA over AWGN and Fading Channels
... a technique used by mobile wireless systems to combat the effects of bit errors introduced during the transmission of frame [2] ...modulation technique. The modulated waveform is then spread using ...
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FHSS, DSSS, And Hybrid DS/FH Performance Evaluation For VSAT
... Sequence Spread Spectrum (DSSS), Frequency Hopping Spread Spectrum (FHSS), and a hybrid approach of both techniques DS/FH are proposed to solve the ...and spread the ...
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Packet-Hiding Mechanism for Selective Jamming Technique
... Conventional anti-jamming techniques dependent on extensively on spread spectrum communications, or some form of jamming avoidance (e.g., slow frequency hopping). Spre[r] ...
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Frequency Hopping Spread Spectrum Security Improvement with Encrypted Spreading Codes in a Partial Band Noise Jamming Environment
... FHSS technique, several users spread their signal spectrum through available wideband frequency spec- trum as narrowband sections with a special code which is called frequency ...
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Efficient Transmission of Information using Transmission Code along FHSS
... a spread-spectrum system uses a process other than the information signal to expand, or spread, the bandwidth of the ...for spectrum spreading are direct sequence and frequency ...The ...
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ANTI-JAMMING BROADCAST COMMUNICATION USING UNCOORDINATED FREQUENCY HOPPING
... communication technique and it exploits node cooperation and multiuser diversities to overcome jamming and improves communication ...Direct-sequence Spread Spectrum (UDSSS) is used for sending data ...
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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 actual ...
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Performance Evaluation of DSSS and FHSS Using Modulation Technique
... FHSS. Spread Spectrum in which the carrier hops from one frequency to other frequency is known as frequency-hop ping spread ...In Frequency hopping spread, ...
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Reconstruction of extremely dense breast composition utilizing inverse scattering technique integrated with frequency hopping approach
... Reconstruction of a 2-D numerical extremely dense breast model is done to demonstrate the validity of the FBTS technique to reconstruct the composition of extremely dense breast model. There are 16 antennas ...
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Comprehensive Review on PN Sequence and their...
... against frequency-selective ...the technique which combines the advantage of multi-carrier modulation with code division multiple access to offer reliable high data rate downlink cellular communication ...
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Column generation for frequency assignment in slow frequency hopping networks
... SFH-FAP, frequency planning has been done on a heuristic basis, ...There, frequency assignments are cre- ated by the means of frequency lists for each transceiver, which are created and improved on a ...
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Improved Performance Evaluation of Frequency Hopped spread spectrum using QAM/FSK Modulation Techniques
... Spread Spectrum modulation techniques are defined as the technique in which the bandwidth of the transmitted signal is much greater than the bandwidth of the original message, and the ba[r] ...
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IJCSMC, Vol. 5, Issue. 5, May 2016, pg.808 – 813 The Review Paper on Securing Wireless Network from External Threats
... Wireless local area network technology are widely deployed & used in organisations today. Using radio frequency (RF) technology, wireless LANs transmit & receive data over air, minimising need for wired ...
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INFORMATION HIDING TECHNIQUE: DIGITAL WATERMARKING
... selected frequency can be ...in frequency domain is more robust and compatible to popular image compression ...Thus frequency-domain watermarking obtains much more ...a frequency ...
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Survey on Various Channel Models for Data Transmission
... 3) Filters utilized for fading procedure ought to have a Gaussian shaped power spectrum (frequency domain) with Doppler spread of power spectrum equivalent to double the standard deviation ...
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A Survey on Spread Spectrum Methods for Image Watermarking in Noisy Environment
... In this approach [1], a watermark is formed from the checksum value of the seven most significant bits of all pixels. A checksum is the modulo-2 addition of a sequence of fixed length binary words which is a type of hash ...
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On the Implementation of Spread Spectrum Fingerprinting in Asymmetric Cryptographic Protocol
... the spread spectrum watermarking technique by carefully designing parameters for rounding ...If frequency components of digital contents are used for the embedding of fingerprint information, ...
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Interference Excision in Spread Spectrum Communications Using Adaptive Positive Time Frequency Analysis
... sequence spread spectrum (DSSS) ...received spread spectrum signal is decomposed into its time-frequency (TF) functions using an adaptive signal decomposition algorithm, and the ...
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