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.
Table Of Contents
Preface.; Receiving Systems and Receiving System Architectures -Introduction. Electronic Support Systems. The Electromagnetic Spectrum. Receiving System Architectures. Fundamental Receiving System Model. Monitor Receivers. Search Receiver Architectures. Key System Performance Parameters. Spread Spectrum. Collection Management. Concluding Remarks. Appendices. ; Signals and Modulation Systems -Introduction. Representing Signals. Complex Signals and Systems. System Definition. Modulations. Random Modulation. Access Methods. Pulse-Shaping Filters. Concluding Remarks.; RF Stage -Introduction. Normalized Input Referred Added Noise. Noise Factor/Figure. Low Noise Amplifiers. Noise Reduction with an Input Transformer. Band Select Filtering/Preselector Filters. Concluding Remarks. ; Bandwidth Expansion for Small Signal Amplifiers -Introduction. Shunt Peaking. Input and Output Matching. Lossy Matching. Feedback. Balanced Amplifiers. Distributed Amplifier. Concluding Remarks. ; RF Mixers and Mixing -Introduction. RF Mixers. Local Oscillators. Concluding Remarks. ; IF Amplifiers -Introduction. Amplifier Input and Output Impedances and Gain. RF Amplifiers. Transformer Coupling. Automatic Gain Control. Concluding Remarks. ; IF Filters -Introduction. Filters and Signals. Basic Filter Types. Filter Approximations. Approaches to Implementing Filters. Concluding Remarks. ; Narrowband Receivers -Introduction. Superheterodyne Receivers. Homodyne (Zero-IF) Receiver. Tuned Radio Frequency Receivers. Concluding Remarks. ; Compressive Receivers -Introduction. Compressive Receiver Configurations. Fundamentals of CxRx Operation. Dispersive Delay Lines. M-C CxRx Operation. The C-M-C Chirp Transform Arrangement. Concluding Remarks. ; Digital Receivers Overview -Introduction. Digital Receiver Architectures. Digital Receiver Technology Drivers. ElementaryIntroduction to RF/IF Digital Signal Processing. Digital EW Receivers. Gain and Phase Imbalance. Concluding Remarks. ; Sampling and Analog-to-Digital Converters -Introduction. Wideband Receivers. Sampling Methods and Analog Filtering. Effects of Quantization Noise, Distortion, and Receiver Noise. Flash ADC. Sigma-Delta ADCs. Flash ADC versus Other ADC Architectures. Other Sampling and ADC Considerations. Concluding Remarks.; Digital Filtering -Introduction. Operation of Digital Filters. Simple Digital Filters. Recursive and Nonrecursive Filters. The Transfer Function of a Digital Filter. Multirate Processing of Bandpass and I/Q Signals. Hilbert Transform and Delay. Concluding Remarks.; Digital Demodulation -Introduction. Digital I/Q Demodulation. Direct IF Digital Demodulator. Direct IF-Processing Elements. I/Q Imbalance Compensation. Concluding Remarks.; Digital-to-Analog Converters -Introduction. Digital-to-Analog Converter Architectures. Error Sources in DACs. Reconstruction Filters. Concluding Remarks. ; Appendices.;