DOWN CONVERTER EMPLOYED IN A DIGITAL DEMODULATOR

DOWN CONVERTER EMPLOYED IN A DIGITAL DEMODULATOR

PURPOSE: A down converter of a digital demodulator is provided to realize a decimation filter which improve processing speed of the down converter by applying polyphase filter theory to the decimation filter generating bottleneck. CONSTITUTION: A down converter(500) down-converts QAM signal transfor...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
1. Verfasser: LEE, CHANG EUI
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page
container_issue
container_start_page
container_title
container_volume
creator LEE, CHANG EUI
description PURPOSE: A down converter of a digital demodulator is provided to realize a decimation filter which improve processing speed of the down converter by applying polyphase filter theory to the decimation filter generating bottleneck. CONSTITUTION: A down converter(500) down-converts QAM signal transformed to digital samples in digital demodulator. The first multiplier(210) multiplies the digital samples by cosine coefficient to transform it to I samples of baseband. The second multiplier(310) multiplies the digital samples by sine coefficient(Fct) to transform it to Q samples of baseband. The first decimation filter(200) selects the I sample signal alternatively and adds the selected I samples to generates the selected baseband I signal. The second decimation filter(300) selects the Q sample signal alternatively and adds the selected Q samples to generates the selected baseband Q signal.
format Patent
fullrecord <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_KR100252341BB1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>KR100252341BB1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_KR100252341BB13</originalsourceid><addsrcrecordid>eNrjZDBw8Q_3U3D29wtzDQpxDVJw9Q3w8Y90dVHw9FNwVHDxdPcMcfRRcHH19XcJ9XEM8Q_iYWBNS8wpTuWF0twMym6uIc4euqkF-fGpxQWJyal5qSXx3kGGBgZGpkbGJoZOTobGxKkCAMFjJyQ</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>DOWN CONVERTER EMPLOYED IN A DIGITAL DEMODULATOR</title><source>esp@cenet</source><creator>LEE, CHANG EUI</creator><creatorcontrib>LEE, CHANG EUI</creatorcontrib><description>PURPOSE: A down converter of a digital demodulator is provided to realize a decimation filter which improve processing speed of the down converter by applying polyphase filter theory to the decimation filter generating bottleneck. CONSTITUTION: A down converter(500) down-converts QAM signal transformed to digital samples in digital demodulator. The first multiplier(210) multiplies the digital samples by cosine coefficient to transform it to I samples of baseband. The second multiplier(310) multiplies the digital samples by sine coefficient(Fct) to transform it to Q samples of baseband. The first decimation filter(200) selects the I sample signal alternatively and adds the selected I samples to generates the selected baseband I signal. The second decimation filter(300) selects the Q sample signal alternatively and adds the selected Q samples to generates the selected baseband Q signal.</description><edition>7</edition><language>eng</language><subject>ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</subject><creationdate>2000</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=20000415&amp;DB=EPODOC&amp;CC=KR&amp;NR=100252341B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20000415&amp;DB=EPODOC&amp;CC=KR&amp;NR=100252341B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>LEE, CHANG EUI</creatorcontrib><title>DOWN CONVERTER EMPLOYED IN A DIGITAL DEMODULATOR</title><description>PURPOSE: A down converter of a digital demodulator is provided to realize a decimation filter which improve processing speed of the down converter by applying polyphase filter theory to the decimation filter generating bottleneck. CONSTITUTION: A down converter(500) down-converts QAM signal transformed to digital samples in digital demodulator. The first multiplier(210) multiplies the digital samples by cosine coefficient to transform it to I samples of baseband. The second multiplier(310) multiplies the digital samples by sine coefficient(Fct) to transform it to Q samples of baseband. The first decimation filter(200) selects the I sample signal alternatively and adds the selected I samples to generates the selected baseband I signal. The second decimation filter(300) selects the Q sample signal alternatively and adds the selected Q samples to generates the selected baseband Q signal.</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>2000</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDBw8Q_3U3D29wtzDQpxDVJw9Q3w8Y90dVHw9FNwVHDxdPcMcfRRcHH19XcJ9XEM8Q_iYWBNS8wpTuWF0twMym6uIc4euqkF-fGpxQWJyal5qSXx3kGGBgZGpkbGJoZOTobGxKkCAMFjJyQ</recordid><startdate>20000415</startdate><enddate>20000415</enddate><creator>LEE, CHANG EUI</creator><scope>EVB</scope></search><sort><creationdate>20000415</creationdate><title>DOWN CONVERTER EMPLOYED IN A DIGITAL DEMODULATOR</title><author>LEE, CHANG EUI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_KR100252341BB13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2000</creationdate><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</topic><toplevel>online_resources</toplevel><creatorcontrib>LEE, CHANG EUI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>LEE, CHANG EUI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>DOWN CONVERTER EMPLOYED IN A DIGITAL DEMODULATOR</title><date>2000-04-15</date><risdate>2000</risdate><abstract>PURPOSE: A down converter of a digital demodulator is provided to realize a decimation filter which improve processing speed of the down converter by applying polyphase filter theory to the decimation filter generating bottleneck. CONSTITUTION: A down converter(500) down-converts QAM signal transformed to digital samples in digital demodulator. The first multiplier(210) multiplies the digital samples by cosine coefficient to transform it to I samples of baseband. The second multiplier(310) multiplies the digital samples by sine coefficient(Fct) to transform it to Q samples of baseband. The first decimation filter(200) selects the I sample signal alternatively and adds the selected I samples to generates the selected baseband I signal. The second decimation filter(300) selects the Q sample signal alternatively and adds the selected Q samples to generates the selected baseband Q signal.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record>
fulltext fulltext_linktorsrc
identifier
ispartof
issn
language eng
recordid cdi_epo_espacenet_KR100252341BB1
source esp@cenet
subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title DOWN CONVERTER EMPLOYED IN A DIGITAL DEMODULATOR
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-10T13%3A52%3A00IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=LEE,%20CHANG%20EUI&rft.date=2000-04-15&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EKR100252341BB1%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true