Carrier reset device

Carrier reset device

The invention relates to device for recovering carrier wave of digital TV set in VSB mode, spatially, recovering carrier wave is carried out under case that base band Q signal in path low pass filter is divided to base band I signal. Thus, even if linear noise (Ghost) exists in received signal, Q si...

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1. Verfasser: ZHENGZHI JIN
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator ZHENGZHI JIN
description The invention relates to device for recovering carrier wave of digital TV set in VSB mode, spatially, recovering carrier wave is carried out under case that base band Q signal in path low pass filter is divided to base band I signal. Thus, even if linear noise (Ghost) exists in received signal, Q signal passing through low pass filter being near to zero, phase lock up can well be carried on. In addition, when output of divider is multiplied by gain, gradient of S curve is similar to the case, where there is no ghost echo. Thus, there is large ghost echo in transmission channel and pilot signal becomes small, but the disclosed device carries out recovering carrier wave correctly.
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Thus, even if linear noise (Ghost) exists in received signal, Q signal passing through low pass filter being near to zero, phase lock up can well be carried on. In addition, when output of divider is multiplied by gain, gradient of S curve is similar to the case, where there is no ghost echo. Thus, there is large ghost echo in transmission channel and pilot signal becomes small, but the disclosed device carries out recovering carrier wave correctly.</description><edition>7</edition><language>eng</language><subject>ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; PICTORIAL COMMUNICATION, e.g. TELEVISION ; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</subject><creationdate>2005</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&amp;date=20050330&amp;DB=EPODOC&amp;CC=CN&amp;NR=1602070A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20050330&amp;DB=EPODOC&amp;CC=CN&amp;NR=1602070A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ZHENGZHI JIN</creatorcontrib><title>Carrier reset device</title><description>The invention relates to device for recovering carrier wave of digital TV set in VSB mode, spatially, recovering carrier wave is carried out under case that base band Q signal in path low pass filter is divided to base band I signal. 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Thus, there is large ghost echo in transmission channel and pilot signal becomes small, but the disclosed device carries out recovering carrier wave correctly.</description><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRICITY</subject><subject>PICTORIAL COMMUNICATION, e.g. TELEVISION</subject><subject>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2005</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBBxTiwqykwtUihKLU4tUUhJLctMTuVhYE1LzClO5YXS3Azybq4hzh66qQX58anFBYnJqXmpJfHOfoZmBkYG5gaOxoRVAAC_cR-y</recordid><startdate>20050330</startdate><enddate>20050330</enddate><creator>ZHENGZHI JIN</creator><scope>EVB</scope></search><sort><creationdate>20050330</creationdate><title>Carrier reset device</title><author>ZHENGZHI JIN</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN1602070A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2005</creationdate><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>PICTORIAL COMMUNICATION, e.g. TELEVISION</topic><topic>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</topic><toplevel>online_resources</toplevel><creatorcontrib>ZHENGZHI JIN</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>ZHENGZHI JIN</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Carrier reset device</title><date>2005-03-30</date><risdate>2005</risdate><abstract>The invention relates to device for recovering carrier wave of digital TV set in VSB mode, spatially, recovering carrier wave is carried out under case that base band Q signal in path low pass filter is divided to base band I signal. Thus, even if linear noise (Ghost) exists in received signal, Q signal passing through low pass filter being near to zero, phase lock up can well be carried on. In addition, when output of divider is multiplied by gain, gradient of S curve is similar to the case, where there is no ghost echo. Thus, there is large ghost echo in transmission channel and pilot signal becomes small, but the disclosed device carries out recovering carrier wave correctly.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record>
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title Carrier reset device
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