The Detection of Amplitude Shift Keyed Signals PDF Download

Author: Tharek Abdul Rahman
Publisher:
ISBN:
Category : Data transmission systems
Languages : en
Pages : 100

View

Book Description

Author: J. Krishnamurthy
Publisher:
ISBN:
Category :
Languages : en
Pages : 88

View

Book Description
A class of Robust Detection Schemes for the detection of a class of time varying signals in additive disturbance are proposed and analyzed and their performance is evaluated. The proposed detection schemes are applicable for the detection of both binary and M-ary Amplitude Shift Keyed Signals. Two detection schemes are proposed for solving the detection problem where the samples of the received signal contain pure signal components that are all unequal. These detection schemes are designated as nonparametric detection scheme and Detection Scheme with Fixed Thresholds (DSFT). The performance of these detectors is compared with that of the Least Squares Detector. It is observed that the proposed detection schemes are robust and generally lead to lower probability of error. The asymptotic relative efficiency for the detectors is shown to be greater than unity under a variety of noise conditions. The performance of the proposed detectors is immune to intersymbol interference if it is assumed that the intersymbol interference can be replaced by an unknown constant. These detectors lead to other advantages such as being unaffected by unknown amounts of DC drifts or changes in the mean values of the noise. (Author).

Author: Earl McCune
Publisher: Cambridge University Press
ISBN: 1139484737
Category : Technology & Engineering
Languages : en
Pages : 435

View

Book Description
Do you need to know what signal type to select for a wireless application? Quickly develop a useful expertise in digital modulation with this practical guide, based on the author's experience of over thirty years in industrial design. You will understand the physical meaning behind the mathematics of wireless signals and learn the intricacies and tradeoffs in signal selection and design. Six modulation families and twelve modulation types are covered in depth, together with a quantitative ranking of relative cost incurred to implement any of twelve modulation types. Extensive discussions of the Shannon Limit, Nyquist filtering, efficiency measures and signal-to-noise measures are provided, radio wave propagation and antennas, multiple access techniques, and signal coding principles are all covered, and spread spectrum and wireless system operation requirements are presented.

Author: J. Krishnamurthy
Publisher:
ISBN:
Category :
Languages : en
Pages : 37

View

Book Description
A robust detection scheme, called Detection Scheme with Learning of Thresholds (DSLT), for the detection of M-ary Amplitude Shift Keyed Signals is proposed and analyzed. It is shown that DSLT performs better (in the sense of lower probability of error) than the Detection Scheme with Fixed Thresholds. The improvement in performance is due to the fact that DSLT assumes a priori information regarding the approximate form of noise distribution, unlike DSFT. The performance of DSLT is independent of the mean value of the noise, unknown amounts of DC drifts and intersymbol interference if it can be assumed that the intersymbol interference can be replaced by an unknown constant. (Author).

Author: Richard W. Middlestead
Publisher: John Wiley & Sons
ISBN: 1119011841
Category : Technology & Engineering
Languages : en
Pages : 828

View

Book Description
This book uses a practical approach in the application of theoretical concepts to digital communications in the design of software defined radio modems. This book discusses the design, implementation and performance verification of waveforms and algorithms appropriate for digital data modulation and demodulation in modern communication systems. Using a building-block approach, the author provides an introductory to the advanced understanding of acquisition and data detection using source and executable simulation code to validate the communication system performance with respect to theory and design specifications. The author focuses on theoretical analysis, algorithm design, firmware and software designs and subsystem and system testing. This book treats system designs with a variety of channel characteristics from very low to optical frequencies. This book offers system analysis and subsystem implementation options for acquisition and data detection appropriate to the channel conditions and system specifications, and provides test methods for demonstrating system performance. This book also: Outlines fundamental system requirements and related analysis that must be established prior to a detailed subsystem design Includes many examples that highlight various analytical solutions and case studies that characterize various system performance measures Discusses various aspects of atmospheric propagation using the spherical 4/3 effective earth radius model Examines Ionospheric propagation and uses the Rayleigh fading channel to evaluate link performance using several robust waveform modulations Contains end-of-chapter problems, allowing the reader to further engage with the text Digital Communications with Emphasis on Data Modems is a great resource for communication-system and digital signal processing engineers and students looking for in-depth theory as well as practical implementations.

Author: Adam Dennis Hall
Publisher:
ISBN:
Category : Gaussian distribution
Languages : en
Pages :

View

Book Description

Author: J. Krishnamurthy
Publisher:
ISBN:
Category :
Languages : en
Pages : 101

View

Book Description
Two Robust Detection Schemes for the detection of a class of time varying signals in additive disturbance are proposed and analyzed and their performance is evaluated. The proposed detection schemes, called Robust Detection Scheme I (RDSI) and Robust Detection Scheme II (RDSII) are applicable when the samples of the received signal or a filtered version of the received signal contain pure signal components that are all equal. It is shown that both binary and M-ary Phase Shift Keyed and Frequency Shift Keyed Signals can be detected by using RDSI and RDSII. The performance of the detectors is compared with that of the Mean and Sign detectors. It is observed that the proposed detectors generally lead to lower probability of error, except when the Mean and the Sign detectors are the Maximum Likelihood detectors. Analytical expressions for the average probability of error, the asymptotic relative efficiency and the asymptotic efficiency are derived and it is shown that the proposed detectors are superior or equivalent to the Sign detector and superior to the Mean detector in nongaussian noise. (Author).

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 372

View

Book Description

Author: Alexander M. Wyglinski
Publisher: Artech House
ISBN: 1630814598
Category : Technology & Engineering
Languages : en
Pages : 375

View

Book Description
Based on the popular Artech House classic, Digital Communication Systems Engineering with Software-Defined Radio, this book provides a practical approach to quickly learning the software-defined radio (SDR) concepts needed for work in the field. This up-to-date volume guides readers on how to quickly prototype wireless designs using SDR for real-world testing and experimentation. This book explores advanced wireless communication techniques such as OFDM, LTE, WLA, and hardware targeting. Readers will gain an understanding of the core concepts behind wireless hardware, such as the radio frequency front-end, analog-to-digital and digital-to-analog converters, as well as various processing technologies. Moreover, this volume includes chapters on timing estimation, matched filtering, frame synchronization message decoding, and source coding. The orthogonal frequency division multiplexing is explained and details about HDL code generation and deployment are provided. The book concludes with coverage of the WLAN toolbox with OFDM beacon reception and the LTE toolbox with downlink reception. Multiple case studies are provided throughout the book. Both MATLAB and Simulink source code are included to assist readers with their projects in the field.

Author: Le Nguyen Binh
Publisher: CRC Press
ISBN: 142008206X
Category : Science
Languages : en
Pages : 610

View

Book Description
The need for advanced transmission techniques over long haul optically amplified communications has prompted a convergence of digital and optical communications. Digital Optical Communications explores the practical applications of this union and applies digital modulation techniques to optical communications systems.After reviewing the fundamental