Maximum Bandwidth Utilization Demodulator
In narrow-band transmission of television or radar over telephone lines it is necessary to use a carrier system to avoid phase distortion normally present at the lower end of the transmission band. Using ordinary modulation and demodulation techniques, the usable video bandwidth is limited to one-ha...
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| Veröffentlicht in: | I.R.E. transactions on communications systems 1960-06, Vol.8 (2), p.83-86 |
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| container_title | I.R.E. transactions on communications systems |
| container_volume | 8 |
| creator | Gatfield, A. |
| description | In narrow-band transmission of television or radar over telephone lines it is necessary to use a carrier system to avoid phase distortion normally present at the lower end of the transmission band. Using ordinary modulation and demodulation techniques, the usable video bandwidth is limited to one-half the carrier frequency. In the limiting case in which the carrier is placed at the extreme upper end of the band, thin is one-half the total available bandwidth.A new modulation-demodulation system has been developed which is basically amplitude modulation but which is not subject to the normal two-to-one limitation. Using this system, it is possible to use a video frequency of as much as nine-tenths that of the carrier. For example, one may use a video frequency of 3.2 kc on a 3.5-kc carrier. |
| doi_str_mv | 10.1109/TCOM.1960.1097611 |
| format | Article |
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Using ordinary modulation and demodulation techniques, the usable video bandwidth is limited to one-half the carrier frequency. In the limiting case in which the carrier is placed at the extreme upper end of the band, thin is one-half the total available bandwidth.A new modulation-demodulation system has been developed which is basically amplitude modulation but which is not subject to the normal two-to-one limitation. Using this system, it is possible to use a video frequency of as much as nine-tenths that of the carrier. 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For example, one may use a video frequency of 3.2 kc on a 3.5-kc carrier.</description><subject>Amplitude modulation</subject><subject>Bandwidth</subject><subject>Demodulation</subject><subject>Envelope detectors</subject><subject>Frequency conversion</subject><subject>Narrowband</subject><subject>Phase distortion</subject><subject>Radar</subject><subject>Telephony</subject><issn>0096-2244</issn><issn>2162-2132</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1960</creationdate><recordtype>article</recordtype><recordid>eNpNj8tOwzAQRS0EEqHwAYhNtixSZiaOYy8hPKVW3bRry_VDGCUNSlLx-HoStQtWV6M7Z0aHsWuEOSKou3W1Ws5RiXEEVQrEE5YQCsoIczplCYASGRHn5-yi7z8AcigVJOx2ab5js2_SB7NzX9EN7-lmiHX8NUNsd-mjb1q3r83QdpfsLJi691fHnLHN89O6es0Wq5e36n6R2fHTkBmprCN0igpB4IUkq0QBxC3QFgUEjnIblCNVcihMoaQRZXAYgFtJIPMZw8Nd27V93_mgP7vYmO5HI-jJVU-uenLVR9eRuTkw0Xv_b__Q_gEGhE52</recordid><startdate>196006</startdate><enddate>196006</enddate><creator>Gatfield, A.</creator><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>196006</creationdate><title>Maximum Bandwidth Utilization Demodulator</title><author>Gatfield, A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c132t-a89cd21d925620e682c965024c02b160f418bf9d297405a598a67fd1f04c82083</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1960</creationdate><topic>Amplitude modulation</topic><topic>Bandwidth</topic><topic>Demodulation</topic><topic>Envelope detectors</topic><topic>Frequency conversion</topic><topic>Narrowband</topic><topic>Phase distortion</topic><topic>Radar</topic><topic>Telephony</topic><toplevel>online_resources</toplevel><creatorcontrib>Gatfield, A.</creatorcontrib><collection>CrossRef</collection><jtitle>I.R.E. transactions on communications systems</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Gatfield, A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Maximum Bandwidth Utilization Demodulator</atitle><jtitle>I.R.E. transactions on communications systems</jtitle><stitle>IRET-COMS</stitle><date>1960-06</date><risdate>1960</risdate><volume>8</volume><issue>2</issue><spage>83</spage><epage>86</epage><pages>83-86</pages><issn>0096-2244</issn><eissn>2162-2132</eissn><abstract>In narrow-band transmission of television or radar over telephone lines it is necessary to use a carrier system to avoid phase distortion normally present at the lower end of the transmission band. Using ordinary modulation and demodulation techniques, the usable video bandwidth is limited to one-half the carrier frequency. In the limiting case in which the carrier is placed at the extreme upper end of the band, thin is one-half the total available bandwidth.A new modulation-demodulation system has been developed which is basically amplitude modulation but which is not subject to the normal two-to-one limitation. Using this system, it is possible to use a video frequency of as much as nine-tenths that of the carrier. For example, one may use a video frequency of 3.2 kc on a 3.5-kc carrier.</abstract><doi>10.1109/TCOM.1960.1097611</doi><tpages>4</tpages></addata></record> |
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| identifier | ISSN: 0096-2244 |
| ispartof | I.R.E. transactions on communications systems, 1960-06, Vol.8 (2), p.83-86 |
| issn | 0096-2244 2162-2132 |
| language | eng |
| recordid | cdi_ieee_primary_1097611 |
| source | IEEE Electronic Library (IEL) |
| subjects | Amplitude modulation Bandwidth Demodulation Envelope detectors Frequency conversion Narrowband Phase distortion Radar Telephony |
| title | Maximum Bandwidth Utilization Demodulator |
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