Fsk discriminator
The outputs of two filter channels for accepting two keying frequencies are compared to produce the output. Each channel uses finite impulse response transversal filters; preferably with an impulse response of duration comparable with the symbol period of the incoming signal. Each channel has a pair...
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| creator | HUGHES PATRICK MICHAEL HALL MARTIN CHRISTOPHER LIND LARRY FREDERICK |
| description | The outputs of two filter channels for accepting two keying frequencies are compared to produce the output. Each channel uses finite impulse response transversal filters; preferably with an impulse response of duration comparable with the symbol period of the incoming signal. Each channel has a pair of filters for accepting phase quadrature components (or, alternatively, quadrature synchronous demodulators followed by filters): the filter coefficients differ from sinusoidal by (or, in the alternative case, are formed by) a modification function which is the same for both filters of the pair. |
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Each channel uses finite impulse response transversal filters; preferably with an impulse response of duration comparable with the symbol period of the incoming signal. Each channel has a pair of filters for accepting phase quadrature components (or, alternatively, quadrature synchronous demodulators followed by filters): the filter coefficients differ from sinusoidal by (or, in the alternative case, are formed by) a modification function which is the same for both filters of the pair.</description><edition>5</edition><language>eng</language><subject>ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</subject><creationdate>1994</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19941130&DB=EPODOC&CC=IE&NR=61886B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19941130&DB=EPODOC&CC=IE&NR=61886B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HUGHES PATRICK MICHAEL</creatorcontrib><creatorcontrib>HALL MARTIN CHRISTOPHER</creatorcontrib><creatorcontrib>LIND LARRY FREDERICK</creatorcontrib><title>Fsk discriminator</title><description>The outputs of two filter channels for accepting two keying frequencies are compared to produce the output. Each channel uses finite impulse response transversal filters; preferably with an impulse response of duration comparable with the symbol period of the incoming signal. Each channel has a pair of filters for accepting phase quadrature components (or, alternatively, quadrature synchronous demodulators followed by filters): the filter coefficients differ from sinusoidal by (or, in the alternative case, are formed by) a modification function which is the same for both filters of the pair.</description><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRICITY</subject><subject>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1994</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBB0K85WSMksTi7KzM3MSyzJL-JhYE1LzClO5YXS3Axybq4hzh66qQX58anFBYnJqXmpJfGermaGFhZmTobGBBUAACdiHoY</recordid><startdate>19941130</startdate><enddate>19941130</enddate><creator>HUGHES PATRICK MICHAEL</creator><creator>HALL MARTIN CHRISTOPHER</creator><creator>LIND LARRY FREDERICK</creator><scope>EVB</scope></search><sort><creationdate>19941130</creationdate><title>Fsk discriminator</title><author>HUGHES PATRICK MICHAEL ; HALL MARTIN CHRISTOPHER ; LIND LARRY FREDERICK</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_IE61886B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1994</creationdate><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</topic><toplevel>online_resources</toplevel><creatorcontrib>HUGHES PATRICK MICHAEL</creatorcontrib><creatorcontrib>HALL MARTIN CHRISTOPHER</creatorcontrib><creatorcontrib>LIND LARRY FREDERICK</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>HUGHES PATRICK MICHAEL</au><au>HALL MARTIN CHRISTOPHER</au><au>LIND LARRY FREDERICK</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Fsk discriminator</title><date>1994-11-30</date><risdate>1994</risdate><abstract>The outputs of two filter channels for accepting two keying frequencies are compared to produce the output. Each channel uses finite impulse response transversal filters; preferably with an impulse response of duration comparable with the symbol period of the incoming signal. Each channel has a pair of filters for accepting phase quadrature components (or, alternatively, quadrature synchronous demodulators followed by filters): the filter coefficients differ from sinusoidal by (or, in the alternative case, are formed by) a modification function which is the same for both filters of the pair.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| subjects | ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION |
| title | Fsk discriminator |
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