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Aerospace and Electronic Systems Magazine, IEEE

Issue 8 • Date Aug. 2008

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  • Front cover - IEEE Aerospace and Electronic Systems Magazine

    Publication Year: 2008 , Page(s): c1
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  • This month's covers ...

    Publication Year: 2008 , Page(s): c2
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  • Table of contents

    Publication Year: 2008 , Page(s): 1
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  • In this issue - technically

    Publication Year: 2008 , Page(s): 2
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  • Exemplum [From the Editor-in-Chief]

    Publication Year: 2008 , Page(s): 3
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  • How we see

    Publication Year: 2008 , Page(s): 4 - 9
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4129 KB) |  | HTML iconHTML  

    The visual world is imaged on the retinas of our eyes. However, "seeing"' is not a result of neural functions within the eyes but rather a result of what the brain does with those images. Our visual perceptions are produced by parts of the cerebral cortex dedicated to vision. Although our visual awareness appears unitary, different parts of the cortex analyze color, shape, motion, and depth information. There are also special mechanisms for visual attention, spatial awareness, and the control of actions under visual guidance. Often lesions from stroke or other neurological diseases will impair one of these subsystems, leading to unusual deficits such as the inability to recognize faces, the loss of awareness of half of visual space, or the inability to see motion or color. View full abstract»

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  • Ground-to-satellite laser communication experiments

    Publication Year: 2008 , Page(s): 10 - 18
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5141 KB) |  | HTML iconHTML  

    Ground-to-satellite laser communication experiments between the optical ground station located in Koganei, central Tokyo, and a low earth orbit (LEO) satellite were jointly performed by the Japan Aerospace Exploration Agency and the National Institute of Information and Communications Technology. In 18 trials during three non-consecutive months, the satellite was acquired and tracked 61 % of the time, when clear or partly-clear conditions were predominant. The optical link was maintained for about 6 minutes when the satellite was visible in spite of the high angular velocity of the satellite. In 3 of the 18 trials, the link was not interrupted due to clouds during the six-minute transit. The failures (39% of the time) occurred when cloudy or rainy conditions were predominant. Fluctuation in the uplink received signal power was minimized by using multiple laser beam transmissions. The measured uplink and downlink bit error ratios were 10-7-10-4. These results demonstrate the applicability of free-space laser communication for not only geostationary earth orbit-LEO optical links but also ground-to-LEO optical links. View full abstract»

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  • Reliable electro-mechanical actuators in aircraft

    Publication Year: 2008 , Page(s): 19 - 25
    Cited by:  Papers (18)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3829 KB) |  | HTML iconHTML  

    There is a general trend in the aerospace industry toward increasing the use of electrically-powered equipment. This trend is usually referred to as "Power-by-Wire" in the "More Electric Aircraft" (MEA) concept and it leads, among others, to the substitution of hydraulic actuators by electro-mechanical actuators (EMA). Its benefits are a decrease in maintenance effort and weight, and an increase in efficiency. However, jamming case obstacles stop the massive use of EMAs in flight-control actuators. The aim herein is to introduce the safety needs of electro-mechanical actuators in aircraft applications, and Its major goal is to present the suitability and reliability of such actuator systems, including electric motors and power converters. View full abstract»

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  • WiMAX dynamnic beamforming antenna

    Publication Year: 2008 , Page(s): 26 - 31
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3787 KB) |  | HTML iconHTML  

    This presents our design and development of an 8-channel adaptive beamforming antenna for new developments in radio technology: the emergence of chip-based components implementing the recently completed IEEE 802.16d-2004 (WiMAX) radio standard [1-4]. WiMAX offers the potential of long-range (up to 50 miles) and high bandwidth (up to 50 Mb/s) radio links. Although the new WiMAX standard offers the potential for using smart, adaptive antennas, this functionality has not been implemented. Our design will serve as a common platform for testing adaptive array algorithms including direction of arrival (DOA) estimation, beamforming, and adaptive tracking, as well as complete wireless communication with a WiMAX radio. Heavy emphasis will be placed on ease of implementation in a multi-channel/multi-user environment. In the future, we hope to expand this interface to support dynamic radio channel selection via direct interaction with radio hardware or implementation of a cognitive radio system. View full abstract»

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  • Fiber lasers: A future space technology [same article as "Fiber lasers: A future technology for lasers in space", ibid, vol. 23, n. 4, pp. 25-30, 08]

    Publication Year: 2008 , Page(s): 32 - 37
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4298 KB) |  | HTML iconHTML  

    The constraints of operation in space have largely precluded the use of conventional solid-state laser systems for applications including remote sensing, communication relays, and active laser radars. A new technology, fiber lasers, may offer all of the needed features at an affordable price. An appealing aspect of the fiber laser is that it does not need a rigid optical bench. Only the output end of the fiber need be held in rigid reference to the optical tracking system. Design, fabrication, and testing of the laser resonator is generally the most expensive and longest lead part of the effort for conventional solid-state lasers. Advances in Fiber Optic technology and devices mean that the "fiber laser" need not be a simple device but may be a complex system employing sophisticated technology such as wavelength selective Bragg reflectors and nonlinear optical frequency shifters. Three companies have recently obtained single-mode outputs of 3540 watts single mode at 1.03-1.1 microns. View full abstract»

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  • Bispectral analysis of atmospheric radar signals

    Publication Year: 2008 , Page(s): 38 - 41
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2100 KB) |  | HTML iconHTML  

    The bispectral analysis techniques have been applied on signals received from the back-scattered signals by the MST radar. The results of this analysis are compared with that of the conventional power spectral analysis using the fast Fourier transform (FFT) technique. Our results showed that there is a significant advantage in using the bispectral technique over the conventional FFT technique. This study focuses on the importance of bispectral analysis in applications to atmospheric signals. View full abstract»

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  • Modified multiple sample correlation algorithm for electronic target location

    Publication Year: 2008 , Page(s): C-1 - C-8
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3461 KB) |  | HTML iconHTML  

    This research proposes a modification to the multiple sample correlation algorithm (MSCA) where some statistical concepts are aggregated to the original method. With our modifications we were able to improve the emitter position fix estimate more than 240% compared to the original MSCA and more than 1,200% compared to the extended Kalman filter methodology. View full abstract»

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  • Waveform Diversity & Design Conference in Orlando

    Publication Year: 2008 , Page(s): 42
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  • PLANS 2008 award recipients

    Publication Year: 2008 , Page(s): 43
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  • Evolution of aircraft avionics

    Publication Year: 2008 , Page(s): 44 - 45
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  • Directory of IEEE-AESS Personnel

    Publication Year: 2008 , Page(s): 46
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  • IEEE Aerospace & Electronic Systems Society Organization

    Publication Year: 2008 , Page(s): 47
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  • 2008 IEEE Aerospace and Electronic Systems Society - Membership application

    Publication Year: 2008 , Page(s): 48
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  • AESS Meetings & Conferences

    Publication Year: 2008 , Page(s): c3
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  • [Back cover]

    Publication Year: 2008 , Page(s): c4 - 4
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Aims & Scope

The IEEE Aerospace and Electronic Systems Magazine publishes articles and tutorials concerned with the various aspects of systems for space, air, ocean, or ground environments.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Teresa Pace, PhD EE
Chief Engineer SenTech
SenTech, LLC - A DSCI Company
12601 Research Parkway
Orlando, FL 32826
(407) 207-1900 ext: 2102
(407) 450-0929 (BB)
tpace@sentech.dsci.com