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IEEE Transactions on Aerospace and Electronic Systems

Issue 2 • March 1975

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Displaying Results 1 - 25 of 30
  • Table of contents

    Publication Year: 1975, Page(s): c1
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    Freely Available from IEEE
  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1975, Page(s):c2 - 296b
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  • From the Editors

    Publication Year: 1975, Page(s): 129
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  • Error Performance of Two-Channel Phase-Measurement Systems

    Publication Year: 1975, Page(s):130 - 136
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1395 KB)

    The problem of measuring a constant phase difference between two sinusoids which have been corrupted by two additive noise processes is investigated. For the case in which both noise processes are Gaussian and the signal-to-noise ratio is high, the variance of the time-averaged phase-difference estimate is found as a single integral over the noise power spectral densities and cross spectral densit... View full abstract»

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  • High-Resolution Imaging of Tropospheric Radio Scatterers

    Publication Year: 1975, Page(s):137 - 146
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1975 KB)

    A two-dimensional matched filter technique is described for processing ing the signal from a pulsed coherent troposcatter link to obtain high crosspath resolution "maps" showing the relative positions of individual scatterers. For a typical tropolink (station displacement 200 km; midpath beam halfwidth 2 km; wavelength 0.3 meters) crosspath resolution is about 4.5 meters under perfect conditions. ... View full abstract»

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  • Target Identification by Natural Resonance Estimation

    Publication Year: 1975, Page(s):147 - 154
    Cited by:  Papers (47)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1858 KB)

    This paper presents a target identification method based on an estimation of the natural frequencies of oscillation in transient radar signatures. The emphasis is placed upon signal modeling and estimation ation strategy rather than relating resonance locations to physical structures. Salient features of this identification method are: 1) target aspect angle is not needed, 2) multiple targets of t... View full abstract»

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  • VTOL Flight-Control System Design Using Sensitivity Analysis

    Publication Year: 1975, Page(s):155 - 161
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1682 KB)

    This paper considers the use of sensitivity and error analysis algorithms for combined estimation and control systems to conduct trade-off studies for sensor equipment packages for a simple longitudinal inal motion VTOL hover controller. Simulation results indicate that in many problems the extra effort expended in model identification ation is justified in order to reduce the sensitivity of the s... View full abstract»

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  • Binary Communication with Large Bandwidth to IF Frequency Ratios

    Publication Year: 1975, Page(s):162 - 168
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1311 KB)

    The effect of I F filter bandwidth to I F frequency ratio on the probability of error in a binary bandpass communication system with nonreturn-to-zero (NRZ) and split-phase (SP) signals is investigated. ed. Explicit results are given for the case when the bandpas I F filter is transformed from a single-pole low-pass filter. View full abstract»

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  • Nonlinear Analysis of a Family of LC Tuned Inverters

    Publication Year: 1975, Page(s):169 - 179
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2207 KB)

    four widely used self-oscillating dc-to-square-wave parallel inverters which employ an inductor-capacitor tuned network to determine the oscillation frequency are reduced to a common equivalent RLC network. The techniques of singular-point analysis and state-plane interpretations are employed to describe the steady-state and transient ient behavior of these circuits and to elucidate the three poss... View full abstract»

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  • False-Lock Detection in Costas Demodulators

    Publication Year: 1975, Page(s):180 - 182
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (617 KB)

    False lock occurs in Costas demodulators with sweep frequency acquisition because sideband energy is detected in the data channel. It is shown that utilizing the data and error channels to make the lock decision will prevent false lock from occurring. View full abstract»

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  • Slope Coding of Coherent Pulse-Burst Waveforms

    Publication Year: 1975, Page(s):183 - 189
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1431 KB)

    Useful new properties are obtained with a coherent pulse-burst waveform if the FM slopes are allowed to change from pulse to pulse. A design feature using such a "slope-coded" waveform is the ability to transfer, in a controllable manner, ambiguity volume from the range ambiguity peaks to regions located between the peaks (in the frequency direction). Slope coding thus provides a useful mechanism ... View full abstract»

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  • Worst Error Performance of Continuous Kalman Filters

    Publication Year: 1975, Page(s):190 - 194
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    The worst error performance of estimation filters is investigated for continuous systems in this paper. The pathological performance study, without assuming any dynamical model such as Markov processes for perturbations, except for its bounded amplitude, will give practical and dependable criteria in establishing the navigation and maneuver strategy in deep space missions. View full abstract»

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  • Attitude and Oribit Estimation Using Stars and Landmarks

    Publication Year: 1975, Page(s):195 - 203
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1594 KB)

    An extended Kalman filter is used to process line-of-sight measurements to stars and known landmarks providing a statistical indication of performance in estimating spacecraft attitude, orbital ephemeris, and the bias drift of a set of three strapdown gyros. The landmark measurements were assumed to have been taken from the imagery of an Earth-observing multispectral scanner. It is shown that filt... View full abstract»

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  • Numerical Results on the Convergence of Relative Efficiencies

    Publication Year: 1975, Page(s):204 - 209
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1541 KB)

    This paper considers the detection of a known constant signal in an additive non-Gaussian noise under the assumptions of discrete time and statistically independent noise samples. The objective is to determine how large sample size must be before the easily computed asymptotic relative efficiency becomes a valid measure of performance. The exact small-sample error probabilities are calculated for ... View full abstract»

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  • Uniform Sampling Analysis of a Hybrid Phase-Locked Loop with a Sample-and-Hold Phase Detector

    Publication Year: 1975, Page(s):210 - 216
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1434 KB)

    Phase-locked-loop (PLL) bit synchronizers often employ integrate-and-dump type phase detectors that provide phase error information only at discrete points in time. Usually these phase detectors are followed by sample-and-hold circuits to produce a stairstep error voltage as the input to a standard analog circuit loop filter. When the loop is configured in this manner, it is referred to as a hybri... View full abstract»

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  • Decision Cells for Positional Radar Identification of Satellites

    Publication Year: 1975, Page(s):217 - 228
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1859 KB)

    There is a problem in deciding whether a radar observation of an object in outer space is of a known catalogued satellite or of a newly launched satellite. With some radar systems joint or dumbell radar images of two satellites cause occasional confusion, and appropriate decision theory for this situation is derived. Decision theory for the individual image is given in an appendix. View full abstract»

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  • Computationally Efficient Bank of Rectangular Digital Filters

    Publication Year: 1975, Page(s):229 - 233
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (975 KB)

    A computationally efficient scheme for forming a bank of identical contiguous rectangular digital filters is described. The data processing is organized in a sequential form allowing use of the FFT algorithm as the first stage. An example is given in which a bank of 256 rectangular filters is formed using only a few percent of the number of complex multiplies required by straightforward procedures... View full abstract»

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  • Detection Statistics for Laser Radar in Atmospheric Turbulence with Fluctuating Targets

    Publication Year: 1975, Page(s):234 - 237
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (863 KB)

    The probability of detection and false-alarm rates are developed for laser radar systems perturbed by background radiation, fluctuating targets, and atmospheric turbulence. In particular, some results on the decibel loss due to atmospheric turbulence are presented. View full abstract»

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  • Relationships Among Classes of Self-Oscillating Transistor Parallel Inverters

    Publication Year: 1975, Page(s):238 - 244
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1292 KB)

    It recently has been shown in the literature that many dc-to-squarewave parallel inverters which are widely used in power-conditioning applications can be grouped into one of two families. Each family is characterized by an equivalent RLC network. Based on this approach, a classification procedure is presented for self-oscillating parallel inverters which makes evident natural relationships which ... View full abstract»

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  • Volterra Series Synthesis of Nonlinear Stochastic Tracking Systems

    Publication Year: 1975, Page(s):245 - 265
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2191 KB)

    One of the most important objectives of a radar angle-tracking loop is to keep the target within the beamwidth of the radar antenna. Thus, the behavior of the antenna pointing error is of vital interest in determination of tracking performance. For a tracker with a general polynomial linearity (representing nonlinear receiver characteristics), subjected to constant line-of-sight rate inputs, rando... View full abstract»

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  • The Effect of Pulse Shape and Duty Cycle on Laser Binary Communication Systems

    Publication Year: 1975, Page(s):266 - 270
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (978 KB)

    The result of an investigation of the effects of pulse shape and duty cycle on the probability of error are presented for a pulse-gated binary modulation (PGBM) laser communication system when the background irradiance has the important Lorentzian spectral shape. View full abstract»

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  • Comment on "Atomic Power Engineering Under Falsified Safety Standards"

    Publication Year: 1975, Page(s):271 - 272
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  • Corrections to "Radar Tracking of Low Altitude Targets"

    Publication Year: 1975, Page(s):272 - 273
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  • Multiple Signal Analysis for the Delay-Lock Discriminator

    Publication Year: 1975, Page(s):273 - 278
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    This correspondence deals with the effect of multiple signals on the control voltage of the delay-lock discriminator (tracker). Given n returned signals with known delay and power, a formula for the tracker estimate is derived. The analysis has specific application to low-altitude altimeters where the leak signal from the transmitter to the receiver may have delay comparable to the delay of the tr... View full abstract»

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  • Angle-of-Arrival Estimation Using an Adaptive Antenna Array

    Publication Year: 1975, Page(s):278 - 284
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1111 KB)

    A direction-finding technique is presented that is capable of simultaneously estimating the arrival angles of multiple signals. Pulsed as well as continuous signals can be handled with the signal form only approximately specified. An adaptive antenna array is used as a processing device in the estimation technique. The effect of input signal and feedback loop parameters upon estimate bias is discu... View full abstract»

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Aims & Scope

IEEE Transactions on Aerospace and Electronic Systems focuses on the organization, design, development, integration, and operation of complex systems for space, air, ocean, or ground environment.  These systems include, but are not limited to, navigation, avionics, spacecraft, aerospace power, radar, sonar, telemetry, defense, transportation, automated testing, and command and control. 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Lance Kaplan
Army Research Laboratory