Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Peter T. Gough"'
Publikováno v:
IEEE Annals of the History of Computing. 39:9-28
Haeff-type tubes formed the high-speed memory of Whirlwind I but had their greatest impact in graphics and display technology, remaining in widespread use until the 1980s. Haeff seems to have been the first to store and display graphics and text on a
Publikováno v:
Microwave and Optical Technology Letters. 53:1606-1610
A Doherty amplifier is described in which odd harmonics from the class-C peaking amplifier flow to the main amplifier to achieve class-F operation, without the need for complicated space consuming harmonic control circuits. The measured efficiency ex
Publikováno v:
IEEE Journal of Oceanic Engineering. 34:262-268
The effect that uncompensated motion errors have on synthetic aperture sonar (SAS) imagery can be severe. Time-domain beamforming SAS reconstruction is able to compensate arbitrary track errors, but the more efficient frequency-domain reconstruction
Autor:
Peter T. Gough, Michael H. B. Hayes
Publikováno v:
IEEE Journal of Oceanic Engineering. 34:207-224
This is a review paper that surveys past work in, and the recent status of, active synthetic aperture sonar (SAS). It covers the early historical development of SAS with its provenance in synthetic aperture radar (SAR) and flows through into what wor
Publikováno v:
IEEE Journal of Oceanic Engineering. 34:239-249
Synthetic aperture sonar (SAS) imaging algorithms assume a specific ping-to-ping phase relation in the collected data. The line-of-sight signal from a nonmoving object adds coherently from ping to ping in the image reconstruction process while any ra
Publikováno v:
Microwave and Optical Technology Letters. 51:2152-2156
This article introduces a gate bias control scheme for Doherty amplifiers, based on the measured gate-voltage to drain-current transfer characteristics of the FETs used, and their ideal fundamental output currents. An amplifier was realized at 800 MH
Autor:
Peter T. Gough, Geoff Chase, Paul Gaynor, Richard Duke, Richard King, XiaoQi Chen, Phil Bones
Publikováno v:
IFAC Proceedings Volumes. 41:15606-15611
The approach taken during restructuring the Mechatronics Program at the University of Canterbury is described, along with challenges faced. The background of the University of Canterbury Mechatronics program is examined, as are the challenges of inte
Publikováno v:
Microwave and Optical Technology Letters. 50:1861-1864
A Doherty amplifier's theoretical gain and efficiency characteristics significantly exceed those achieved by practical simulations and implementations. Analysis and simulation demonstrates that the FET gate voltage to drain current transfer character
Publikováno v:
IEEE Transactions on Communications. 49:1997-2005
To increase wireless system capacity using co-channel signals and multiple receiver antennas, we develop the partitioned Viterbi algorithm (PVA). The PVA estimation complexity increases linearly with each additional co-channel signal rather than expo
Autor:
Peter T. Gough, David W. Hawkins
Publikováno v:
International Journal of Imaging Systems and Technology. 8:343-358
Imaging using synthetic aperture techniques is a mature technique with a host of different reconstruction algorithms available. Often the same basic algorithm has a different name depending on where the particular algorithm is used, since it may have