singh ravi kishore (18 résultats)

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Paperback. Etat : new. Paperback. Advances in technologies in fighter aircrafts, missiles and ICBMs have forced the Radarand Communication Engineering research community to consistently pay attention todetect and locate the fast moving targets from the static radar using extremely sensitivereceivers which are often inherited with noise. State of art works mainly use matchedfilter (autocorrelation) of the received signal with delayed sample of transmitted signal toincrease the amplitude of the main lobe. However this process introduces side lobe whichis the main cause for the loss of energy. The pulse compression technique combines theadvantage of high energy of a long pulse giving adequate range with the high resolutionof a short pulse. This process is helpful in getting ample power transmitted for the radarfor long ranges and the range resolution of a small pulse at the same time. It iscomparatively easy to detect the targets when it is stationary, and sidelobes at the outputof merit factor can be made zero using various techniques. The masking of moving targetsby the side lobe as a result of autocorrelation or the matched filtering hampers thedetection of dangerously small fast moving targets like fighter aircrafts, drones andmissiles etc.Continuous research to increase the Signal to Noise Ratio (SNR), Merit Factor (MF) andIntegrated Side Lobe Ratio (ISLR) also called discrimination factor were attempted bymany authors. Barker codes gave good MF and ISLR by restricting the side lobe to thevalue of one but barker codes were limited to a maximum length of 13. Minimum peakside lobe codes were attempted by many researchers using various optimizing techniqueslike Simulated Annealing, Bi-parental Product Algorithm, skew symmetric binarysequences etc, but with multiple moving targets these approaches failed completely.Attempts were also made to improve the SNR using nested barker codes, mismatchedfiltering using longer binary codes by zero padding, Costas and many other codes, windowing functions etc, however the problem of addressing the Doppler was still atlarge. PTM codes have been introduced to give clear window at zero or low Doppler values, where targets could be detected. Golay codes transmitted in PTM sequences have beenreported to give better results considering oversampled codes. However the same couldnot be adopted easily for fast moving targets.In this thesis we initially start with the development of binary codes, to increase the meritfactor. However these approaches are good for stationary targets and slow moving targets.The main objective is to develop codes to eliminate the side lobs and improve detection ofmultiple moving targets. We have attempted to develop the new set of binary codes whichhelps to create clear windows at desired Doppler to detect multiple fast moving targetswith varying Doppler at different ranges. The sidelobes of the autocorrelation in thesewindows are very low for entire range of the radar giving very good detection.The work done in this thesis brings about a conceptual change in detection process bycreating Doppler windows at various frequencies for which detection is easy for the entirerange of radar. These windows can be created at the desired Doppler in which the noiseamplitude is very low and this makes the detection process very easy without ambiguity.Many techniques using binary and hex codes have been developed to create windows inDoppler where the noise levels are very low and these Doppler windows can be easilycreated at any desired Doppler. Entire practical range of Doppler frequencies based ontarget speeds has been covered and many approa Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.

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Taschenbuch. Etat : Neu. Druck auf Anfrage Neuware - Printed after ordering - The book is a collection of best selected research papers presented at 6 th International Conference on Innovations in Electronics and Communication Engineering at Guru Nanak Institutions Hyderabad, India. The book presents works from researchers, technocrats and experts about latest technologies in electronic and communication engineering. The book covers various streams of communication engineering like signal processing, VLSI design, embedded systems, wireless communications, and electronics and communications in general. The authors have discussed the latest cutting edge technology and the volume will serve as a reference for young researchers.

Taschenbuch. Etat : Neu. Neuware -The book is a collection of best selected research papers presented at 6th International Conference on Innovations in Electronics and Communication Engineering at Guru Nanak Institutions Hyderabad, India. The book presents works from researchers, technocrats and experts about latest technologies in electronic and communication engineering. The book covers various streams of communication engineering like signal processing, VLSI design, embedded systems, wireless communications, and electronics and communications in general. The authors have discussed the latest cutting edge technology and the volume will serve as a reference for young researchers.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 536 pp. Englisch.

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Paperback. Etat : Brand New. 536 pages. 9.25x6.10x1.21 inches. In Stock.

PAP. Etat : New. New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

PAP. Etat : New. New Book. Delivered from our UK warehouse in 4 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

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Kartoniert / Broschiert. Etat : New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Provides the latest developments in the field of electronics and communication engineeringAims to provide an opportunity for researchers, scientists, technocrats, academicians and engineers to exchange their innovative ideas and research.

Taschenbuch. Etat : Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The book is a collection of best selected research papers presented at 6 th International Conference on Innovations in Electronics and Communication Engineering at Guru Nanak Institutions Hyderabad, India. The book presents works from researchers, technocrats and experts about latest technologies in electronic and communication engineering. The book covers various streams of communication engineering like signal processing, VLSI design, embedded systems, wireless communications, and electronics and communications in general. The authors have discussed the latest cutting edge technology and the volume will serve as a reference for young researchers. 536 pp. Englisch.

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