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| 1. |
Professional engineers and trade unions |
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Radio and Electronic Engineer,
Volume 46,
Issue 2,
1976,
Page 53-53
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PDF (135KB)
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DOI:10.1049/ree.1976.0007
出版商:IERE
年代:1976
数据来源: IET
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| 2. |
Facsimile—A review |
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Radio and Electronic Engineer,
Volume 46,
Issue 2,
1976,
Page 55-63
J.Malster,
M.J.Bowden,
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PDF (1237KB)
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摘要:
The development and potential of facsimile as an alternative means of communication over voicegrade telephone lines is discussed. The components of typical facsimile systems are described, and the characteristics of telephone channels in so far as they influence the performance of facsimile machines are covered, together with the problems confronting manufacturers. These include standardization, compatibility, and compliance with the requirements of national safety and telecommunications authorities. Future trends in the facsimile field are forecast.
DOI:10.1049/ree.1976.0008
出版商:IERE
年代:1976
数据来源: IET
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| 3. |
Hazards to inflammable fuels and vapours due to induced microwave radiation |
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Radio and Electronic Engineer,
Volume 46,
Issue 2,
1976,
Page 64-68
S.I.Ghobrial,
M.K.Verma,
D.P.Howson,
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PDF (485KB)
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摘要:
Experimental results are presented for the minimum energy required for ignition of various gas/air mixtures in a microwave test cell.
DOI:10.1049/ree.1976.0009
出版商:IERE
年代:1976
数据来源: IET
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| 4. |
An automatic clarifier for s.s.b. speech communication |
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Radio and Electronic Engineer,
Volume 46,
Issue 2,
1976,
Page 69-75
W.Gosling,
S.R.Al-Araji,
J.R.Olivera,
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PDF (721KB)
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摘要:
By introducing certain inaudible distortion into the audio wave-forms used to modulate an s.s.b. transmitter it becomes possible to detect any frequency translations in the system. Audio frequency circuits in the receiver generate an a.f.c. voltage proportional to any such translation, and and this is used automatically to correct the frequency of the local carrier generator without the need for pilot tones or carrier. At present the system has a lock-in range in excess of ± 200 Hz, and a locked-in error of a few hertz. It may make practicable s.s.b. operation at v.h.f, as well as simplifying the operation of h.f. equipment.
DOI:10.1049/ree.1976.0010
出版商:IERE
年代:1976
数据来源: IET
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| 5. |
A peripheral-sharing interlinked mini-computer system |
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Radio and Electronic Engineer,
Volume 46,
Issue 2,
1976,
Page 76-82
C.J.Kelley,
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PDF (654KB)
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摘要:
The system described allows several interlinked mini-computers to communicate with each other and to share a range of peripherals under software control, thus giving a wide variety of configurations depending upon program requirements.
DOI:10.1049/ree.1976.0011
出版商:IERE
年代:1976
数据来源: IET
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| 6. |
Performance of anM-ary p.s.k. system in the presence of additive noise, intersymbol interference and fading |
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Radio and Electronic Engineer,
Volume 46,
Issue 2,
1976,
Page 83-91
JanuszNowakowski,
IreneuszProtasewicz,
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PDF (1030KB)
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摘要:
The results of an investigation of the evaluation of energy signal degradation of anM-ary p.s.k. system due to intersymbol interference and fading are analysed.Attention is concentrated upon the influence of intersymbol interference caused by the limited band of the receiver filter as well as the transmitter one. As far as the channel is concerned, it has been assumed there is nonselective fading in it.Part 1 presents the analysis method being applied;Part 2 analyses the energy degradation characteristics ofM-ary signals resulting from intersymbol interference in the case when no fading occurs in the channel;Part 3 analyses the influence of intersymbol interference and fading jointly.
DOI:10.1049/ree.1976.0012
出版商:IERE
年代:1976
数据来源: IET
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