TIMING SYNCHRONIZATION AND PHASE/FREQUENCY CORRECTION OF QPSK SIGNALS

A method and apparatus for digitally demodulating QPSK signals includes a first portion in which the digitally sampled data burst is resampled with a plurality of predetermined timing hypotheses. The timing offset is determine d according to an analysis of the resampled data. The digitally sampled d...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	LEIGH, WILLIAM E. L, BECKER, DONALD W
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SELECTING RESONANT CIRCUITS TRANSMISSION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION TUNING RESONANT CIRCUITS
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	LEIGH, WILLIAM E. L BECKER, DONALD W
description	A method and apparatus for digitally demodulating QPSK signals includes a first portion in which the digitally sampled data burst is resampled with a plurality of predetermined timing hypotheses. The timing offset is determine d according to an analysis of the resampled data. The digitally sampled data burst is then resampled according to the timing estimation. Modulation of th e resampled data burst is then removed by twice squaring the complex I/Q pairs . The data with the modulation removed is then subjected to a Chirp-Z Transfor m to move the data into the frequency domain. The highest spectral power is us ed to determine the frequency offset. The phase offset is determined and the resampled data burst is derotated and dephased according to the phase offset and the frequency offset.
format	Patent
fullrecord	<record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_CA2386766A1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>CA2386766A1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_CA2386766A13</originalsourceid><addsrcrecordid>eNrjZHAN8fT19HNXCI70c_YI8vfzjHIM8fT3U3D0c1EI8HAMdtV3C3INDHX1c45UcPYPCnJ1Bkv7uykEBgR7KwR7uvs5-gTzMLCmJeYUp_JCaW4GBTfXEGcP3dSC_PjU4oLE5NS81JJ4Z0cjYwszczMzR0NjIpQAAGESK_o</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>TIMING SYNCHRONIZATION AND PHASE/FREQUENCY CORRECTION OF QPSK SIGNALS</title><source>esp@cenet</source><creator>LEIGH, WILLIAM E. L ; BECKER, DONALD W</creator><creatorcontrib>LEIGH, WILLIAM E. L ; BECKER, DONALD W</creatorcontrib><description>A method and apparatus for digitally demodulating QPSK signals includes a first portion in which the digitally sampled data burst is resampled with a plurality of predetermined timing hypotheses. The timing offset is determine d according to an analysis of the resampled data. The digitally sampled data burst is then resampled according to the timing estimation. Modulation of th e resampled data burst is then removed by twice squaring the complex I/Q pairs . The data with the modulation removed is then subjected to a Chirp-Z Transfor m to move the data into the frequency domain. The highest spectral power is us ed to determine the frequency offset. The phase offset is determined and the resampled data burst is derotated and dephased according to the phase offset and the frequency offset.</description><edition>7</edition><language>eng ; fre</language><subject>BASIC ELECTRONIC CIRCUITRY ; CALCULATING ; COMPUTING ; COUNTING ; ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRIC DIGITAL DATA PROCESSING ; ELECTRICITY ; PHYSICS ; PICTORIAL COMMUNICATION, e.g. TELEVISION ; SELECTING RESONANT CIRCUITS ; TRANSMISSION ; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION ; TUNING RESONANT CIRCUITS</subject><creationdate>2001</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=20010308&DB=EPODOC&CC=CA&NR=2386766A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20010308&DB=EPODOC&CC=CA&NR=2386766A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>LEIGH, WILLIAM E. L</creatorcontrib><creatorcontrib>BECKER, DONALD W</creatorcontrib><title>TIMING SYNCHRONIZATION AND PHASE/FREQUENCY CORRECTION OF QPSK SIGNALS</title><description>A method and apparatus for digitally demodulating QPSK signals includes a first portion in which the digitally sampled data burst is resampled with a plurality of predetermined timing hypotheses. The timing offset is determine d according to an analysis of the resampled data. The digitally sampled data burst is then resampled according to the timing estimation. Modulation of th e resampled data burst is then removed by twice squaring the complex I/Q pairs . The data with the modulation removed is then subjected to a Chirp-Z Transfor m to move the data into the frequency domain. The highest spectral power is us ed to determine the frequency offset. The phase offset is determined and the resampled data burst is derotated and dephased according to the phase offset and the frequency offset.</description><subject>BASIC ELECTRONIC CIRCUITRY</subject><subject>CALCULATING</subject><subject>COMPUTING</subject><subject>COUNTING</subject><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRIC DIGITAL DATA PROCESSING</subject><subject>ELECTRICITY</subject><subject>PHYSICS</subject><subject>PICTORIAL COMMUNICATION, e.g. TELEVISION</subject><subject>SELECTING RESONANT CIRCUITS</subject><subject>TRANSMISSION</subject><subject>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</subject><subject>TUNING RESONANT CIRCUITS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2001</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHAN8fT19HNXCI70c_YI8vfzjHIM8fT3U3D0c1EI8HAMdtV3C3INDHX1c45UcPYPCnJ1Bkv7uykEBgR7KwR7uvs5-gTzMLCmJeYUp_JCaW4GBTfXEGcP3dSC_PjU4oLE5NS81JJ4Z0cjYwszczMzR0NjIpQAAGESK_o</recordid><startdate>20010308</startdate><enddate>20010308</enddate><creator>LEIGH, WILLIAM E. L</creator><creator>BECKER, DONALD W</creator><scope>EVB</scope></search><sort><creationdate>20010308</creationdate><title>TIMING SYNCHRONIZATION AND PHASE/FREQUENCY CORRECTION OF QPSK SIGNALS</title><author>LEIGH, WILLIAM E. L ; BECKER, DONALD W</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CA2386766A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>2001</creationdate><topic>BASIC ELECTRONIC CIRCUITRY</topic><topic>CALCULATING</topic><topic>COMPUTING</topic><topic>COUNTING</topic><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRIC DIGITAL DATA PROCESSING</topic><topic>ELECTRICITY</topic><topic>PHYSICS</topic><topic>PICTORIAL COMMUNICATION, e.g. TELEVISION</topic><topic>SELECTING RESONANT CIRCUITS</topic><topic>TRANSMISSION</topic><topic>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</topic><topic>TUNING RESONANT CIRCUITS</topic><toplevel>online_resources</toplevel><creatorcontrib>LEIGH, WILLIAM E. L</creatorcontrib><creatorcontrib>BECKER, DONALD W</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>LEIGH, WILLIAM E. L</au><au>BECKER, DONALD W</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>TIMING SYNCHRONIZATION AND PHASE/FREQUENCY CORRECTION OF QPSK SIGNALS</title><date>2001-03-08</date><risdate>2001</risdate><abstract>A method and apparatus for digitally demodulating QPSK signals includes a first portion in which the digitally sampled data burst is resampled with a plurality of predetermined timing hypotheses. The timing offset is determine d according to an analysis of the resampled data. The digitally sampled data burst is then resampled according to the timing estimation. Modulation of th e resampled data burst is then removed by twice squaring the complex I/Q pairs . The data with the modulation removed is then subjected to a Chirp-Z Transfor m to move the data into the frequency domain. The highest spectral power is us ed to determine the frequency offset. The phase offset is determined and the resampled data burst is derotated and dephased according to the phase offset and the frequency offset.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record>
fulltext	fulltext_linktorsrc
identifier
ispartof
issn
language	eng ; fre
recordid	cdi_epo_espacenet_CA2386766A1
source	esp@cenet
subjects	BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SELECTING RESONANT CIRCUITS TRANSMISSION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION TUNING RESONANT CIRCUITS
title	TIMING SYNCHRONIZATION AND PHASE/FREQUENCY CORRECTION OF QPSK SIGNALS
url	https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-04T23%3A37%3A27IST&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=LEIGH,%20WILLIAM%20E.%20L&rft.date=2001-03-08&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3ECA2386766A1%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