Download or read book Methods and Apparatuses Using Filter Banks for Multi carrier Spread Spectrum Signals written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A transmitter includes a synthesis filter bank to spread a data symbol to a plurality of frequencies by encoding the data symbol on each frequency, apply a common pulse-shaping filter, and apply gains to the frequencies such that a power level of each frequency is less than a noise level of other communication signals within the spectrum. Each frequency is modulated onto a different evenly spaced subcarrier. A demodulator in a receiver converts a radio frequency input to a spread-spectrum signal in a baseband. A matched filter filters the spread-spectrum signal with a common filter having characteristics matched to the synthesis filter bank in the transmitter by filtering each frequency to generate a sequence of narrow pulses. A carrier recovery unit generates control signals responsive to the sequence of narrow pulses suitable for generating a phase-locked loop between the demodulator, the matched filter, and the carrier recovery unit.
Download or read book Adaptive Spread Spectrum Systems Using Filterbanks and the Discrete Wavelet Transform written by Gary J. Saulnier and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the development of new approaches for providing anti-jam, multipath resistant, multi-user communications based on filterbank and wavelet techniques. The first portion considers the synthesis of spreading waveforms using full binary tree multi-rate filterbank design techniques. Non-binary spreading waveforms are produced that are optimized for multi-user, multipath and interference channels and shown to out-perform some conventional spreading sequences. The second part of the report describes and evaluates a spread spectrum version of Orthogonal Frequency Division Multiplexing (OFDM) wherein the same information is transmitted on multiple orthogonal carriers, creating both time and frequency diversity. In the receiver, time domain and transform domain excision are used to improve performance in pulsed wideband or narrowband jamming, respectively. In addition, the report considers replacing the inverse and forward FFT's commonly used in OFDM systems with inverse and forward Modulated Lapped Transforms (MLT's). Performance results demonstrate the effectiveness of the techniques. For both the spreading waveform design and OFDM work, simulations were performed using the Signal Processing WorkSystem (SPW) from AltaGroup of Cadence Design Systems, Inc.
Download or read book Adaptive Spread Spectrum Systems Using Filterbanks and the Discrete Wavelet Transform written by Gary J. Saulnier and published by . This book was released on 1998 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the development of new approaches for providing anti-jam, multipath resistant, multi-user communications based on filterbank and wavelet techniques. The first portion considers the synthesis of spreading waveforms using full binary tree multi-rate filterbank design techniques. Non-binary spreading waveforms are produced that are optimized for multi-user, multipath and interference channels and shown to out-perform some conventional spreading sequences. The second part of the report describes and evaluates a spread spectrum version of Orthogonal Frequency Division Multiplexing (OFDM) wherein the same information is transmitted on multiple orthogonal carriers, creating both time and frequency diversity. In the receiver, time domain and transform domain excision are used to improve performance in pulsed wideband or narrowband jamming, respectively. In addition, the report considers replacing the inverse and forward FFT's commonly used in OFDM systems with inverse and forward Modulated Lapped Transforms (MLT's). Performance results demonstrate the effectiveness of the techniques. For both the spreading waveform design and OFDM work, simulations were performed using the Signal Processing WorkSystem (SPW) from AltaGroup of Cadence Design Systems, Inc.
Download or read book Filter Bank Multicarrier Spread Spectrum Communications written by Daryl Leon Wasden and published by . This book was released on 2014 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multi Carrier and Spread Spectrum Systems written by K. Fazel and published by John Wiley & Sons. This book was released on 2004-02-06 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frequency spectrum is a limited and valuable resource for wireless communications. A good example can be observed among network operators in Europe for the prices to pay for UMTS-frequency bands. Therefore, the first goal when designing future wireless communication systems (e.g. 4G - fourth generation) has to be the increase in spectral efficiency. The development in digital communications in the past years has enabled efficient modulation and coding techniques for robust and spectral efficient data, speech, audio and video transmission. These are the multi-carrier modulation (e.g. OFDM) and the spread spectrum technique (e.g. DS-CDMA), where OFDM was chosen for broadcast applications (DVB, DAB) as well as for broadband wireless indoor standards (ETSI HIPERLAN-II, IEEE-802.11) and the DS-CDMA was selected in mobile communications (IS-95, third generation mobile radio systems world wide, UMTS/IMT 2000). Since 1993 various combinations of multi-carrier (MC) modulation and the spread spectrum (SS) technique have been introduced and the field of MC-SS communications has become an independent and important research topic with increasing activities. New application fields have been proposed such as high rate cellular mobile, high rate wireless indoor and LMDS. It has been shown that MC-SS offers the high spectral efficiency, robustness and flexibility that is required for the next generation systems. Meanwhile, different alternative hybrid schemes such as OFDM/OFDMA, MC-TDMA, etc. have been deeply analysed and adopted in different international standards (ETSI-BRAN, IEEE-802 & MMAC). Multi-Carrier & Spread-Spectrum: Analysis of Hybrid Air Interfaces draws together all of the above mentioned hybrid schemes therefore providing a greatly needed resource for system engineers, telecommunication designers and researchers in order to enable them to develop, build and deploy several schemes based on MC-transmission for the next generation systems (which will be an integration of broadband multimedia services covering both 4G mobile and fixed wireless systems). * Offers a complete treatment of multi-carrier, spread-spectrum (SS) and time division multiplexing (TDM) techniques * Provides an in-depth insight into hybrid multiple access techniques based on multi-carrier (MC) transmission * Presents numerous hybrid multiple access and air interface architectures including OFDM/CDMA, MC-CDMA, MC-DS-CDMA and MT-CDMA * Covers new techniques such as space-time coding and software radio Telecommunications engineers, hardware & software system designers and researchers as well as students, lecturers and technicians will all find this an invaluable addition to their bookshelf.
Download or read book Spread Spectrum Systems written by Robert Clyde Dixon and published by Wiley-Interscience. This book was released on 1976 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Power Line Communications written by Lutz Lampe and published by John Wiley & Sons. This book was released on 2016-04-27 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition of Power Line Communications will show some adjustments in content including new material on PLC for home and industry, PLC for multimedia, PLC for smart grid and PLC for vehicles. Additional chapters include coverage of Channel Characterization, Electromagnetic Compatibility, Coupling, and Digital Transmission Techniques. This book will provide the reader with a wide coverage of the major developments within the field. With contributions from some of the most active researchers on PLC, the book brings together a wealth of international experts on specific PLC topics.
Download or read book Multi carrier spread spectrum techniques for wireless systems written by Pheeradej Nanan and published by . This book was released on 2002 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coherent Spread Spectrum Systems written by Jack Kenneth Holmes and published by . This book was released on 1990 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multirate Filter Banks for Spread Spectrum Waveform Design written by Kenneth J. Hetling and published by . This book was released on 1996 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spread Spectrum Communications Handbook Electronic Edition written by Marvin K. Simon and published by McGraw Hill Professional. This book was released on 2001-09-22 with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The acknowledged Spread-Spectrum Bible the most complete reference in the field! INCLUDESCD-ROM CONTAININGTHE ENTIRE BOOKIN FULLY-SEARCHABLE PDF Spread-spectrum systems have found important commercial applications in CDMA cellular networks and wireless personal communication networks. Communications engineers and technicians now have ready access to a wealth of spread-spectrum information in this exhaustive handbook the most comprehensive and authoritative compendium on spread-spectrum systems available anywhere. Written by recognized authorities in the field, the Handbook presents both theoretical basics and practical applications, providing succinct, results-oriented solutions to engineering problems. Starting with basic concepts and system models, the book covers: Anti-jamming communication systems Coherent direct-sequence systems Non-coherent frequency-hopped systems Coherent and differentially coherent modulation techniques Pseudonoise acquistion and tracking in direct sequence receivers Time and frequency synchronization of frequency-hopped receivers Low probability of intercept communications In addition, it offers an in-depth look at multiple access communications and positioning systems and discusses the growth of spread-spectrum applications. INCLUDES CD-ROM CONTAINING THE ENTIRE BOOK IN FULLY SEARCHABLE PDF
Download or read book Spread Spectrum Techniques written by Robert Clyde Dixon and published by . This book was released on 2000 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spread Spectrum Communications written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Avionics Panel and published by . This book was released on 1973 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1997 with total page 2240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SPREAD SPECTRUM SYSTEMS WITH COMMERCIAL APPLICATIONS 3RD ED written by Robert C. Dixon and published by . This book was released on 2010-08-01 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: GENERAL SPREAD SPECTRUM SYSTEMS.· The Whats and Whys of Spread Spectrum Systems.· Spread Spectrum Techniques.· Coding for Communications and Ranging.· Modulation and Modulators: Generating the Wideband Signal.· Correlation and Demodulation.· Synchronization.· The RF Link.· Navigating with Spread Spectrum Systems.· Applications of Spread Spectrum Methods.· Test and Evaluation of Spread Spectrum Systems.COMMERCIAL APPLICATIONS OF SPREAD SPECTRUM SYSTEMS.· Tradeoffs in Commercial Applications of Spread Spectrum Systems.· Multiple Access, Snake Oil, and Fairy Tales.· Current Consumer and Commercial Systems.· Turning the (Spread Spectrum) World Upside Down.
Download or read book Signal Processing for 5G written by Fa-Long Luo and published by John Wiley & Sons. This book was released on 2016-10-17 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and invaluable guide to 5G technology, implementation and practice in one single volume. For all things 5G, this book is a must-read. Signal processing techniques have played the most important role in wireless communications since the second generation of cellular systems. It is anticipated that new techniques employed in 5G wireless networks will not only improve peak service rates significantly, but also enhance capacity, coverage, reliability , low-latency, efficiency, flexibility, compatibility and convergence to meet the increasing demands imposed by applications such as big data, cloud service, machine-to-machine (M2M) and mission-critical communications. This book is a comprehensive and detailed guide to all signal processing techniques employed in 5G wireless networks. Uniquely organized into four categories, New Modulation and Coding, New Spatial Processing, New Spectrum Opportunities and New System-level Enabling Technologies, it covers everything from network architecture, physical-layer (down-link and up-link), protocols and air interface, to cell acquisition, scheduling and rate adaption, access procedures and relaying to spectrum allocations. All technology aspects and major roadmaps of global 5G standard development and deployments are included in the book. Key Features: Offers step-by-step guidance on bringing 5G technology into practice, by applying algorithms and design methodology to real-time circuit implementation, taking into account rapidly growing applications that have multi-standards and multi-systems. Addresses spatial signal processing for 5G, in particular massive multiple-input multiple-output (massive-MIMO), FD-MIMO and 3D-MIMO along with orbital angular momentum multiplexing, 3D beamforming and diversity. Provides detailed algorithms and implementations, and compares all multicarrier modulation and multiple access schemes that offer superior data transmission performance including FBMC, GFDM, F-OFDM, UFMC, SEFDM, FTN, MUSA, SCMA and NOMA. Demonstrates the translation of signal processing theories into practical solutions for new spectrum opportunities in terms of millimeter wave, full-duplex transmission and license assisted access. Presents well-designed implementation examples, from individual function block to system level for effective and accurate learning. Covers signal processing aspects of emerging system and network architectures, including ultra-dense networks (UDN), software-defined networks (SDN), device-to-device (D2D) communications and cloud radio access network (C-RAN).
