Download or read book Enhancing the Instantaneous Dynamic Range of Electronic Warfare Receivers Using Statistical Signal Processing written by Bryan E. Smith and published by . This book was released on 2004-03 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurately processing multiple, time-coincident signals presents a challenge to Electronic Warfare (EW) receivers, especially if the signals are close in frequency and/or mismatched in amplitude. The metric that quantifies an EW receiver's ability to measure time-coincident signals is the Instantaneous Dynamic Range (IDR), defined for a given frequency estimation accuracy, a given frequency separation and a given SNR as the maximum signal amplitude ratio that can be accommodated. Using a two sinusoid time-series model, this thesis analyzes IDR for ideal intercept and parametric digital EW receivers. In general, the number of signals contained in the EW receiver measurement interval is unknown. Thus, the non-parametric Discrete Fourier Transform (DFT) is employed in an EW intercept receiver with the associated amplitude dependent spectral leakage which limits IDR. A novel method to improve the DFT-based intercept receiver IDR by compensating for the high amplitude signal's spectral leakage using computationally efficient 3 bin interpolation algorithms is proposed and analyzed. For a desired frequency estimation accuracy of 1.5 bins, the method achieves an IDR of 57 dB with little frequency separation dependence when the signals are separated by more than 2 bins with a low amplitude signal SNR of 10 dB. For situations where the number of signals contained in the measurement interval is known, the IDR of an Iterative Generalized Least Squares (IGLS) algorithm-based parametric receiver is analyzed. A real and complex signal IDR Cramer-Rao Bound (IDR-CRB) is derived for parametric receivers by extending results contained in Rife. For tight frequency estimate requirements (these requirements depend on the number of measurement samples), the IDR-CRB yields achievable bounds. For less stringent frequency estimate requirements, the IDR-CRB is unrealistic

Download or read book Digital Techniques for Wideband Receivers written by James Tsui and published by IET. This book was released on 2015-10-30 with total page 609 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital Techniques for Wideband Receivers is widely recognized as the definitive design guide on digital processing work with today's complex receiver systems. This third edition brings readers up-to-date with the latest information on wideband electronic warfare receivers, and includes new chapters on the detection of FM and BPSK radar signals, analog-to-information, time-reversal filter, monobit receivers with improved instantaneous dynamic range and it offers insights on building electronic warfare receivers. From fundamental concepts and procedures, to recent technology advances in digital receivers, readers get practical solutions to important wideband receiver problems. This book has been updated with many of the latest concepts to help users design receivers that are relevant for today's electronic warfare systems. It will be an ideal reference for defense digital signal processing engineers, in government and industry.

Download or read book Digital Techniques for Wideband Receivers written by James B. Tsui and published by SciTech Publishing. This book was released on 2004-06-30 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a current, comprehensive design guide for your digital processing work with today's complex receiver systems. This book brings you up-to-date with the latest information on wideband electronic warfare receivers, the ADC testing procedure, frequency channelization and decoding schemes, and the operation of monobit receivers.

Download or read book Electronic Warfare Receivers and Receiving Systems written by Richard A. Poisel and published by Artech House. This book was released on 2015-06-01 with total page 833 pages. Available in PDF, EPUB and Kindle. Book excerpt: Receivers systems are considered the core of electronic warfare (EW) intercept systems. Without them, the fundamental purpose of such systems is null and void. This book considers the major elements that make up receiver systems and the receivers that go in them. This resource provides system design engineers with techniques for design and development of EW receivers for modern modulations (spread spectrum) in addition to receivers for older, common modulation formats. Each major module in these receivers is considered in detail. Design information is included as well as performance tradeoffs of various components. Major factors that influence the functioning of the modules are identified and discussed. Key performance parameters are identified as well, and approaches to achieving design goals are considered.

Download or read book Special Design Topics in Digital Wideband Receivers written by James B. Y. Tsui and published by Artech House. This book was released on 2010 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering engineers a thorough examination of special, more advanced aspects of digital wideband receiver design, this practical book builds on fundamental resources on the topic, helping you gain a more comprehensive understanding of the subject. This in-depth volume presents a detailed look at a complete receiver design, including the encoder. Moreover, it discusses the detection of exotic signals and provides authoritative guidance on designing receivers used in electronic warfare. From frequency modulation and biphase shifting keys, to parameter encoders in electronic warfare receivers and the use of the simulation and probability density function to predict the false alarm parameter, this book focuses on critical topics and techniques that help you design digital wideband receivers for top performance. The authoritative reference is supported with over 310 illustrations and more than 180 equations.

Download or read book Modern Communications Receiver Design and Technology written by Cornell Drentea and published by Artech House. This book was released on 2010 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive sourcebook thoroughly explores the state-of-the-art in communications receivers, providing detailed practical guidance for constructing an actual high dynamic range receiver from system design to packaging. You also find clear explanations of the technical underpinnings that you need to understand for your work in the field . This cutting-edge reference presents the latest information on modern superheterodyne receivers, dynamic range, mixers, oscillators, complex coherent synthesizers, automatic gain control, DSP and software radios.You find in-depth discussions on system design, including coverage of all pertinent data and tools. Moreover, the book offers you a solid understanding of packaging and mechanical considerations, as well as a look at tomorrowOCOs receiver technology, including new Bragg-cell applications for ultra-wideband electronic warfare receivers. This one-stop resource is packed with over 300 illustrations that support critical topics throughout."

Download or read book Electronic Warfare Signal Processing written by James Genova and published by Artech House Publishers. This book was released on 2017-01-31 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a prominent expert in the field, this authoritative new resource presents anti-ship missile (ASM) electronic protection (EP) techniques designed to enhance accurate target classification. This book provides a comprehensive introduction to modern electronic warfare (EW) in an era of information warfare (IW). It explores the capabilities of coherent radar and digital signal processing to rapidly and accurately classify targets that ultimately save lives. Both naval and air electronic EW are covered in this resource. This book gives insight into modern EW as an information battle and includes guidance on properly testing the effectiveness of electronic attack (EA) systems.Pulsed Doppler radar basics including, electromagnetic pulse, dynamic range, gain control, and Doppler effects are presented. A summary of the ASM sensor and EA model is provided and readers find coverage of the radar range equation, burn through, and the range Doppler map and imaging. Special topic-extended target classifications including, false, decoys, and chaff are explained. Special topic ASM EP waveforms and multiple receiver EP are also covered. This book explores features of algorithms to optimize combining multiple parameters and systems. Moreover, it explains several algorithms proposed by PRC personnel to implement optimal two-channel processing that mitigates cover noise EA.

Download or read book Emitter Detection and Geolocation for Electronic Warfare written by Nicholas O'Donoughue and published by Artech House. This book was released on 2019-10-31 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive resource provides theoretical formulation for detecting and geolocating non-cooperative emitters. Implementation of geolocation algorithms are discussed, as well as performance prediction of a hypothetical passive location system for systems analysis or vulnerability calculation. Comparison of novel direction finding and geolocation algorithms to classical forms are also included. Rooted in statistical signal processing and array processing theory, this book also provides an overview of the application of novel detection and estimation algorithms to real world problems in EW. The book is divided into three parts: detection, angle of arrival estimation, and geolocation. Each section begins with an introductory chapter covering the relevant signal processing theory (either detection or estimation), then provides a series of chapters covering specific methods to achieve the desired end-product. MATLAB® code is provided to assist readers with relevant probability and statistics, RF propagation, atmospheric absorption, and noise, giving readers an understanding of the implementation of the algorithms in the book, as well as developing new approaches to solving problems. Packed with problem sets and examples, this book strikes a balance between introductory texts and reference manuals, making it useful for novice as well as advanced practitioners.

Download or read book Electronic Warfare Receiving Systems written by Dennis David Vaccaro and published by Artech House Radar Library (Ha. This book was released on 1993 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a reference work for EW engineers which is also intended for university use in advanced undergraduate or graduate-level courses in EW, radar, and aerospace systems. This text reviews the fundamental concepts and physical principles underlying EW receiving systems design analysis, and performance evaluation. The main discussion focuses on radar signals in military applications.

Download or read book Programmable High Dynamic Range Receiver Front Ends Using Periodically Time Varying Circuits written by Shi Bu and published by . This book was released on 2021 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the proliferation of frequency bands that need to be supported in wireless standards, such as LTE, GSM, 5G, etc., modern wireless transceiver designs rely on numerous off-chip SAW/BAW filters and many on-chip LC tanks, which are typically not very tunable. On the receiver end, this is because wireless signals typically possess vastly different strengths, and such large signal strength differences necessitate the receiver front-ends to be low-noise and linear, while providing sharp filtering. Hence, conventional approaches resort to passive off- and on-chip band-pass filters. Not only are these filters bulky, but they generally have fixed bandwidths and center frequencies, therefore a number of them are needed, occupying a lot of PCB and chip area to cover multiple bands. Consequently, it has been of significant interest in recent years to explore high-programmability SAW/BAW-less transceivers for emerging software-defined and cognitive radio applications. However, without the pre-filtering provided by SAW/BAW filters, such receivers face great challenges in providing sufficient performance in the aforementioned aspects simultaneously. Some recent approaches include N-path filters (NPFs), mixer-first receivers, and discrete-time (DT) charge-domain signal processing. They have demonstrated some level of programmability, while providing reasonably good performance, yet their overall performance has not reached that of their counterparts using off-chip SAW/BAW filters and/or on-chip LC filters. In this work, we explore the newly developed filtering-by-aliasing (FA) technique to build receiver front-ends using periodically time-varying (PTV) circuits. The FA technique essentially realizes sharp baseband analog FIR filtering. In conjunction with a mixer, the FA receivers offer one of the sharpest band-pass filters achieved with CMOS technologies to date and extremely high programmability. However, they also face a few problems, including relatively high noise, moderate linearity, sensitivity to parasitics at RF, and residual aliases that cannot be further filtered. They limit the ultimate dynamic range that FA receivers can achieve, and prevent wider adoption of FA receivers. This research looks into enabling techniques to enhance the dynamic range of FA receiver front-ends in order to make them more practical. A technique based on PTV noise cancellation was proposed to effectively lower the noise figure (NF) of the receiver, while maintaining the FA sharp filtering. Measurement results show an improvement of about 3 dB on NF, while simultaneously achieving 67-dB stopband rejection with a transition bandwidth of 4 the RF bandwidth. In conjunction with an up-front NPF, an out-of-band IIP3 of +18 dBm and a blocker 1-dB compression point of +9 dBm have been demonstrated. Moreover, an innovative slice-based FA architecture with all switches moved inside the feedback network has been proposed for FA receivers in this work to provide support for carrier aggregation and improve linearity. The fabricated prototype in 28-nm CMOS demonstrated two-channel concurrent reception with filters that achieve 50-dB stopband rejection with a transition bandwidth of 3.2 the RF bandwidth. It has also shown +35-dBm IIP3 and +12-dBm blocker 1-dB compression point with a supply voltage of only 0.9 V, whereas a low LO leakage of -81 dBm was also demonstrated. Further, a residual alias cancellation technique for FA receivers has been proposed and demonstrated on a dual-channel FA receiver. With measured frequency responses of the receiver, digital baseband filters are designed to cancel the residual aliases. Built in MATLAB, the proposed alias cancellation algorithm achieves about 15-dB alias suppression on measured data in addition to the analog FA filtering.

Download or read book Microwave Receivers with Electronic Warfare Applications written by James Bao-Yen Tsui and published by Wiley-Interscience. This book was released on 1986-09-02 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive introduction to microwave receivers stressing both the general characteristics of microwave devices and the uses of particular systems. Covers receiver definition and performance and discusses the important area of receiver systems. Emphasizes the necessity of designing microwave receiver systems to receive hostile communications during electronic warfare. Material has been collected from technical articles, specialists in the field, and the author's own experience. Written at a level appropriate for advanced undergraduates and first-year graduate students.

Download or read book Signal Processing in Electronic Warfare IEE Colloquium on written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Signal Processing Techniques for Electronic Warfare IEE Colloquium on written by Institute of Electrical and Electronics Engineers and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book FPGA based Implementation of a Digital Processor for an Instantaneous Frequency Measurement Receiver written by James M. Helton and published by . This book was released on 2007 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital wideband receivers are essential elements used in electronic warfare (EW) applications. Instantaneous Frequency Measurement (IFM) receivers are suitable for use in EW systems due to the ultrawide instantaneous radio-frequency (RF) bandwidth, fine-frequency resolution, and moderately high sensitivity and dynamic range. Conventional IFM receivers use analog components such as power dividers, crystal video detectors, and hybrids. This research presents the architecture and design implementation of a purely digital IFM receiver based on a patented algorithm courtesy of the United States Air Force. The invention is capable of detecting a short wave pulse with 1 MHz error for every 100 nsec. The benefits include a compact, lightweight, cost-effective alternative to its analog counterpart. The design was implemented and tested on Delphi’s ADC3255 (a PMC digitizer with Xilinx Virtex 4 FPGA). The outputs were verified using Xilinx’s ChipScope Pro.

Download or read book Signal Processing in Electronic Warfare written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Intermodulation in Channelized Digital ESM Receivers written by Ming-Jen Cheng and published by . This book was released on 1996-09-01 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates intermodulation distortion generated by analog-to-digital converters (ADCs) in a channelized digital ESM receiver when processing multiple signals simultaneously. The spurious free dynamic range (SFDR) associated with this distortion is discussed. Two methods for increasing the spurious free dynamic range are evaluated. First, by adding a small amount of Gaussian noise to the input of the receiver, the intermodulation distortion is found to be reduced significantly. Second, by using a narrow bandwidth sub- Nyquist sampling rate with high dynamic range ADCs it is possible to increase the spurious free dynamic range of the digital receiver. The first method is a simple approach but the ability to increase the SFDR is limited. The second method is more effective but requires greater computation and complex receiver design.

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1996 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt: