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| Author | : Donald J. Gray |
| Publisher | : |
| Total Pages | : 58 |
| Release | : 1990 |
| Genre | : Spread spectrum communications |
| ISBN | : |
| Author | : Peter Regent Pawlowski |
| Publisher | : |
| Total Pages | : 700 |
| Release | : 1986 |
| Genre | : Interference (Sound) |
| ISBN | : |
| Author | : Rodger E. Ziemer |
| Publisher | : Morgan & Claypool Publishers |
| Total Pages | : 86 |
| Release | : 2007-12-01 |
| Genre | : Technology & Engineering |
| ISBN | : 159829265X |
This lecture covers the fundamentals of spread spectrum modulation, which can be defined as any modulation technique that requires a transmission bandwidth much greater than the modulating signal bandwidth, independently of the bandwidth of the modulating signal. After reviewing basic digital modulation techniques, the principal forms of spread spectrum modulation are described. One of the most important components of a spread spectrum system is the spreading code, and several types and their characteristics are described. The most essential operation required at the receiver in a spread spectrum system is the code synchronization, which is usually broken down into the operations of acquisition and tracking. Means for performing these operations are discussed next. Finally, the performance of spread spectrum systems is of fundamental interest and the effect of jamming is considered, both without and with the use of forward error correction coding. The presentation ends with consideration of spread spectrum systems in the presence of other users. For more complete treatments of spread spectrum, the reader is referred to [1, 2, 3].
| Author | : Robert C. Dixon |
| Publisher | : |
| Total Pages | : 408 |
| Release | : 1976-11-01 |
| Genre | : |
| ISBN | : 9780471023593 |
| Author | : |
| Publisher | : |
| Total Pages | : 692 |
| Release | : 1995 |
| Genre | : Aeronautics |
| ISBN | : |
| Author | : Marvin K. Simon |
| Publisher | : |
| Total Pages | : 456 |
| Release | : 1985 |
| Genre | : Spread spectrum communications |
| ISBN | : 9780881750157 |
| Author | : Michael G. Van Grouw |
| Publisher | : |
| Total Pages | : 98 |
| Release | : 1989 |
| Genre | : Radio |
| ISBN | : |
| Author | : Don Torrieri |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 589 |
| Release | : 2011-07-15 |
| Genre | : Technology & Engineering |
| ISBN | : 1441995951 |
This book provides a concise but lucid explanation of the fundamentals of spread-spectrum systems with an emphasis on theoretical principles. Throughout the book, learning is facilitated by many new or streamlined derivations of the classical theory. Problems at the end of each chapter are intended to assist readers in consolidating their knowledge and to provide practice in analytical techniques. The choice of specific topics is tempered by the author’s judgment of their practical significance and interest to both researchers and system designers. The evolution of spread spectrum communication systems and the prominence of new mathematical methods in their design provided the motivation to undertake this new edition of the book. This edition is intended to enable readers to understand the current state-of-the-art in this field. More than 20 percent of the material in this edition is new, including a chapter on systems with iterative channel estimation, and the remainder of the material has been thoroughly revised.
| Author | : Evaggelos Geraniotis |
| Publisher | : |
| Total Pages | : 34 |
| Release | : 1987 |
| Genre | : |
| ISBN | : |
In this report, we address the problem of combatting combined interference in spread-spectrum communication links. We consider frequency-hopped spread-spectrum systems with M-ary FSK modulation and noncoherent demodulation that use forward-error control coding. The interference consists of partial-band noise jamming, nonselective Rician fading, other-user interference, and thermal noise. The coding schemes that we analyze include: Reed-Solomon codes (with or without diversity and error/only), erasure-error or parallel erasure/error decoding); binary, nonbinary, and dual-k convolutional codes with or without side information (information about the state of the channel); and concatenated schemes (Reed-Solomon outer codes with either inner detection-only block codes or inner convolutional codes). In all cases, we derive the minimum signal-to-jammer energy ratio required to guarantee a desirable bit error rate as a function of the fraction of the band that is jammed when the number of interfering users is fixed, and the maximum number of users that can be supported by the system as a function of the fraction of the band that is jammed, when the signal-to-jammer energy ratio is fixed. (Author).
| Author | : John J. Carey |
| Publisher | : |
| Total Pages | : 100 |
| Release | : 1999 |
| Genre | : Algorithms |
| ISBN | : |
Examines several algorithms for the separation of multiple users in a frequency hopping spread spectrum system.
