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spread-spectrum measurement techniques

Universal and efficient compressed sensing by spread spectrum and application to realistic Fourier imaging techniques

Universal and efficient compressed sensing by spread spectrum and application to realistic Fourier imaging techniques

... In the above theorems, the role of the mutual coher- ence μ is crucial as the number of measurements needed to reconstruct x scales quadratically with its value. In the worst case where j and ψ are identical, μ = 1 and ...

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Spread Spectrum Sensing Techniques for Transformer Frequency Response Data

Spread Spectrum Sensing Techniques for Transformer Frequency Response Data

... applied spread spectrum sensing techniques on FRA data of a ...FRA measurement became a mandatory diagnosis test for transformers in ...FRA measurement not only provides transformer ...

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Millimetre wave quasi optical signal processing and spread spectrum techniques

Millimetre wave quasi optical signal processing and spread spectrum techniques

... The asymmetry of the frequency response of the detector is clear and the hump around 90GHz is similar to that shown in Fig. 2 11. In order to study the region of the main peak more closely, I altered the frequency of the ...

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Contemporary Spread Spectrum Techniques: A Comparative Study Ashish G. Nandre 1, Yogesh R. Risodkar2

Contemporary Spread Spectrum Techniques: A Comparative Study Ashish G. Nandre 1, Yogesh R. Risodkar2

... Spread spectrum techniques use data independent, random sequences to spread a narrow band information signal over wideband of ...of spread spectrum techniques are ...

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Time-slot Assignment based mostly Channel Access theme for Reliable Transmission

Time-slot Assignment based mostly Channel Access theme for Reliable Transmission

... watermarking techniques which are used for various applications in security and then compare these methods on the basis of different parameters to analyze the limitation and accuracy of encryption and decryption ...

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A Comparison of Steganography in the GIF Image using LSB and
Spread Spectrum Method

A Comparison of Steganography in the GIF Image using LSB and Spread Spectrum Method

... animation. Spread Spectrum method of treating the cover-image as both a noise (noise) or as an effort to add artificial noise (pseudo noise) into the cover ...of spread spectrum is on better ...

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Implementation and Comparison of Watermarking Algorithms using DWT

Implementation and Comparison of Watermarking Algorithms using DWT

... In this paper, an exhaustive overall watermarking performance of all the proposed techniques and the conventional methods have been carried out. As the image watermarking aims at providing a balance between ...

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Design of an Acoustic Communication System Based on FHMA for Multiple Underwater Vehicles

Design of an Acoustic Communication System Based on FHMA for Multiple Underwater Vehicles

... tamed spread spectrum and Frequency Hopping Multiple Access (FHMA) for multiple underwater ...tamed spread spectrum modulation and demodulation, frequency hopping modulation and demodulation ...

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Packet-Hiding Mechanism for Selective Jamming Technique

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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Performance Evaluation of DSSS and FHSS Using Modulation Technique

Performance Evaluation of DSSS and FHSS Using Modulation Technique

... “Spread Spectrum Technique.” Spread Spectrum technique is a Wide-Band ...Mainly Spread Spectrum techniques are DSSS and ...

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Modeling and Simulation of CDMA Codes in Scilab

Modeling and Simulation of CDMA Codes in Scilab

... Compared to conventional access methods, Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA), the CDMA has three mainly advantages: it is a multiplexing scheme based on pseu- do-random ...

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Spread Spectrum Based Digital Audio Watermarking

Spread Spectrum Based Digital Audio Watermarking

... Spread Spectrum Audio Watermarking holds in itself abundant potential for research opportunities due to its wide range of benefits and practical applications in today's ...The techniques mentioned ...

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Detection of direct sequence spread spectrum signals

Detection of direct sequence spread spectrum signals

... (EM) spectrum with the purpose of preserving friendly use and denying enemy use of the spec- trum ...of techniques such as channel coding and encryption complicated gaining unauthorised access to ...

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Novel Attacks on Spread-Spectrum Fingerprinting

Novel Attacks on Spread-Spectrum Fingerprinting

... Gaussian, spread-spectrum fingerprinting, where each user is identified by a random, Gaussian signal which is added to the copyrighted file (host ...

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The Application of PXI VSA in Radar Testing System

The Application of PXI VSA in Radar Testing System

... signal spectrum test, if combined with the use of RF switch, before the test the other measured signal leads to the cable connected to the case, also can complete the excitation source spectrum test, bullet ...

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BER Calculation for CDMA System Using PN & Gold Sequence

BER Calculation for CDMA System Using PN & Gold Sequence

... distribution spectrum there are so many kinds of channels, here in the analysis of system I have used AWGN channel which introduce noise on the basis of channel ...

5

A joint adaptive MMSE downlink receiver

A joint adaptive MMSE downlink receiver

... Channelisation codes 1 to 3 are applied to spread the spectrum of tbe data The spread spectrum signal is organised in data bursts of type 1 and transmitted through a baseband equivalent [r] ...

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Improved Performance Evaluation of Frequency Hopped spread spectrum using QAM/FSK Modulation Techniques

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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Genetic based substitution techniques for audio steganography

Genetic based substitution techniques for audio steganography

... In Chapter 1, an introduction of data hiding, especially for steganography, is given. A brief description of the requirements and applications for steganography is provided. Also steganography definitions are introduced. ...

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Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum

Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum

... As a result it can be concluded that adaptive frequency hopping is a powerful technique to deal with interference and Gilbert-Elliot channel model is a good technique to analyze the situations of channels by categorizing ...

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