| 1. |
Early computers at Manchester University |
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Radio and Electronic Engineer,
Volume 45,
Issue 7,
1975,
Page 327-331
F.C.Williams,
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PDF (2150KB)
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DOI:10.1049/ree.1975.0062
出版商:IERE
年代:1975
数据来源: IET
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| 2. |
Early computer developments at Cambridge: The EDSAC |
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Radio and Electronic Engineer,
Volume 45,
Issue 7,
1975,
Page 332-335
M.V.Wilkes,
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PDF (2386KB)
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DOI:10.1049/ree.1975.0063
出版商:IERE
年代:1975
数据来源: IET
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| 3. |
The Pilot ACE at the National Physical Laboratory |
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Radio and Electronic Engineer,
Volume 45,
Issue 7,
1975,
Page 336-340
J.H.Wilkinson,
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PDF (774KB)
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DOI:10.1049/ree.1975.0064
出版商:IERE
年代:1975
数据来源: IET
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| 4. |
Computers in the University of London, 1945–1962 |
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Radio and Electronic Engineer,
Volume 45,
Issue 7,
1975,
Page 341-345
Andrew D.Booth,
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PDF (1659KB)
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DOI:10.1049/ree.1975.0065
出版商:IERE
年代:1975
数据来源: IET
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| 5. |
The effect of the polarization characteristics of the receiving feed on cross-polarization of receiving reflector antennas |
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Radio and Electronic Engineer,
Volume 45,
Issue 7,
1975,
Page 346-350
S.I.Ghobrial,
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PDF (530KB)
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摘要:
A method for calculating the co-polar and cross-polar radiation patterns of reflector antennas when operated in the receive mode is discussed. A formula for cross-polarization isolation is derived. Methods for cross-polarization reduction are discussed in the light of the obtained results. Numerical computations resulted in excellent agreement between the present method and previously used methods. Practical measurements also confirm the validity of the derived formulae and the conclusions drawn.
DOI:10.1049/ree.1975.0066
出版商:IERE
年代:1975
数据来源: IET
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| 6. |
Analysis of a dual-frequency moving target indication system |
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Radio and Electronic Engineer,
Volume 45,
Issue 7,
1975,
Page 351-356
J.K.Hsiao,
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PDF (687KB)
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摘要:
The problem of a two-frequency m.t.i. system is formulated for a general case. It is concluded that: (a) The two-frequency m.t.i. system sees an increased clutter Doppler variance as compared to that of a single frequency system. (From σ2to σ2(1 +r2) whereris the ratio of the carrier frequencies in the two frequency channels.) (b) The mean clutter-Doppler frequency, at the same time, is reduced accordingly fromf0tof0(1 −r).
DOI:10.1049/ree.1975.0067
出版商:IERE
年代:1975
数据来源: IET
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| 7. |
Diversity techniques for mobile radio reception |
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Radio and Electronic Engineer,
Volume 45,
Issue 7,
1975,
Page 357-367
J.D.Parsons,
M.Henze,
P.A.Ratliff,
M.J.Withers,
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PDF (1452KB)
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摘要:
After discussing the nature of the electromagnetic field in urban environments, and the use of diversity techniques in fading media, the paper presents a survey of these techniques as applied to mobile radio, with emphasis on systems designed for analogue communication. It includes a unified approach to systems based on the double-heterodyne phase-stripper principle. The discussion is not restricted to present-day receivers only, but includes considerations which may apply in future designs.
DOI:10.1049/ree.1975.0068
出版商:IERE
年代:1975
数据来源: IET
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