spread-spectrum radio techniques
Comparative Analysis of Various Digital Modulation Techniques for FHSS WCDMA over AWGN and Fading Channels
... Frequency-hopping spread spectrum (FHSS) is a method of transmitting radio signals by rapidly switching a carrier among many frequency channels, using a pseudo random sequence known to both ...
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A SURVEY OF SPECTRUM SENSING TECHNIQUES FOR COGNITIVE RADIO NETWORKS
... Energy detection technique has few limitations like, at low SNR does not perform well, cannot distinguish between signal and interference and does not work for the spread Spectrum techniques. ...
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Analysis of Cognitive Radio Spectrum Sensing Techniques
... for spectrum sensing in cognitive radio technology ...desired spectrum calculated in this technique and compares it with threshold energy level ...and spread spectrum ...detection ...
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Spread Spectrum Sensing Techniques for Transformer Frequency Response Data
... Reduction techniques, Spectral leakages, Adaptive Modulation and Coding, Spectrum Sensing, Channel Estimation/Equalization/Synchronization, 3GPP, WiMAX, LTE, Performance analysis of sensors, Embedded sytems ...
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CORRELATIVE ANALYSIS OF CYCLOSTATIONARY FEATURE DETECTION AND ENERGY DETECTION USING SIMULINK
... Cognitive radio is one of the modern techniques for wireless communication systems to utilize the unused spread spectrum ...cognitive radio is an Smart radio that can recognize ...
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A Survey of Spectrum Sensing Techniques in Cognitive Radio Networks
... feature radio comes below IEEE ...“Cognitive radio: A radio or system that senses its operational magnetic force atmosphere and might dynamically and autonomously alter its radio operative ...
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Spectrum Sensing Techniques for Cognitive Radio Networks: A Review
... Wideband spectrum sensing (WSS) techniques determine spectral opportunities for secondary users over wide frequency ...wideband spectrum sensing should be employed. Narrowband spectrum sensing ...
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Performance Improvement of Wireless Communications Using Frequency Hopping Spread Spectrum
... hopping spread spectrum is a transmission technology used in wireless networks and a technique to generate spread spectrum by hopping the carrier fre- quency FHSS uses narrow band signal which ...
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A Novel 3D Analytical Scattering Model for Air-to-Ground Fading Channels
... A2G/G2A radio propagation environments for the characterization of the Doppler spectrum and the spatial spread and the second order fading ...angular spread, angular constriction and the ...
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Direction of Arrival Estimation under Spread Spectrum Reference Signal Assisted Radio
... The analysis, which is applied to general receiver antenna array configurations, demonstrates the high performance of the estimator which is due to the double dispreading code word and r[r] ...
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Channel selection for Selective Sensing using Cognitive Radio Nodes
... Cognitive radio network while jointly optimizing power and channel allocation among ...fair spectrum sharing. In [19], spectrum efficiency in multi-hop transmissions is needed by considering route ...
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An Optimized Energy Detection Scheme For Spectrum Sensing In Cognitive Radio
... of Spectrum resources arises ,due to the improper and inefficient usage of available spectrum ...Cognitive radio . The major function of the cognitive radio rely on efficient sensing of ...
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Techniques for Spectrum Sensing in Cognitive Radio Networks: Issues and Challenges
... cognitive radio network, a basic need is to avoid interference to potential primary users in their era and cognitive radios or by providing high priority to primary users than secondary users for radio ...
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Fault location on EHV lines using wideband spread spectrum techniques
... 142.. of the line. This discontinuity will act as a reflection point for signals. The position of this reflection point can be sensed using reflectometer or radar-like techniques. Time[r] ...
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Millimetre wave quasi optical signal processing and spread spectrum techniques
... A spread spectrum receiver must perform two functions — de spreading the incoming signal and demodulating the ...nventional techniques which are well ...
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Spread Spectrum Is Good-But it Does Not Obsolete NBC v. U.S.!
... Radio interference remains a genuine problem--and neither using spread spectrum nor keeping the potentially interfering signal below the noise floor eliminates interfe[r] ...
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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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Co-Operative Spectrum Sensing In Cognitive Radio Network in ISM Band
... radio spectrum. The innovative technique which can use the spectrum effectively is cognitive radio ...unused spectrum in the primary users can be utilized for the secondary users ...
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Spectrum Sensing Techniques in Cognitive Radio Cycle
... Cognitive Radio is an extension of modern Software Defined ...cognitive radio are improving spectrum utilization and increasing communication ...cognitive radio is an intelligent radio ...
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Spectrum Sensing Techniques and Issues in Cognitive Radio
... cognitive radio cannot give high sensitivity so handle this we go for a set of cognitive radios which share their local measurements and collectively decide on the occupancy state of a licensed ...
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