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Patent History
  • Application
    US 09/607647 2000-06-30
  • Granted
    US 6847676 2005-01-25
 
Supplementary

Granted Patent: All-Lag Spread-Spectrum Correlators With Rotating References
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TitleAll-Lag Spread-Spectrum Correlators With Rotating References
 
Granted PatentUS 6847676
 
Granted Date2005-01-25
 
Priority Date2000-06-30 US 09/607647
1999-06-30 US 09/141732P
 
InventorsNg, Tung Sang
Cheng, Chin Long
Yip, Kun Wah
 
Issue Date2005
 
CitationUS Patent 6847676. Washington, DC: US Patent and Trademark Office (USPTO), 2005 [How to Cite?]
 
AbstractAn All-Lag Rotating-Reference Correlator Correlates A Received Spread-Spectrum Signal With A Rotating Reference Code, And Produces In Each Sampling Instance N Correlation Lags Corresponding To The Correlation Of The Received Signal With 0, 1, . . . , N-1 Lags (Or Delays) Of The Rotating Reference Code, Wherein N Is The Length Of The Rotating Reference Code. The Rotating Reference Code Is Time-Variant And Is Generated By A Rotation Of A Basic Reference Code. The Received Signal, Possibly Embedded In Noise And Interference, Consists Of Periodic Replicas Of The Basic Reference Code With Or Without Data Modulation. The First Embodiment Of The Present Invention Describes A Method And Apparatus Of An All-Lag Rotating-Reference Correlator Which Is Applicable To Situations Where Data Modulation Is Not Present In The Received Signal. The Second Embodiment Of The Present Invention Describes A Method And Apparatus Of An All-Lag Rotating-Reference Correlator Which Is Applicable For Situations Where Data Modulation Is Present In The Received Signal. Corresponding Methods And Apparatus Are Also Described When Only A Number Of Selected Correlation Lags Are Required To Be Generated. Each Apparatus Comprises Storage Means For Storing Spread-Spectrum Signal Samples, Subtraction Means, A Plurality Of Multiplication Means Each Of Which Computes The Multiplication Result For The Output Of Subtraction Means And An Element Of Rotating Reference Code, Storage Means For Storing Correlation Lags, And A Plurality Of Addition Means.
 
ReferencesUS 5022047 (A) 1991-06-04

US 6198765 (B1) 2001-03-06

US 6208291 (B1) 2001-03-27

US 6289041 (B1) 2001-09-11

US 6330292 (B1) 2001-12-11

US 6611512 (B1) 2003-08-26
 
DC FieldValue
dc.contributor.inventorNg, Tung Sang
 
dc.contributor.inventorCheng, Chin Long
 
dc.contributor.inventorYip, Kun Wah
 
dc.date.accessioned2011-10-19T06:30:02Z
 
patents.date.application2000-06-30
 
dc.date.available2011-10-19T06:30:02Z
 
patents.date.granted2005-01-25
 
dc.date.issued2005
 
patents.date.priority2000-06-30 US 09/607647
 
patents.date.priority1999-06-30 US 09/141732P
 
dc.description.abstractAn All-Lag Rotating-Reference Correlator Correlates A Received Spread-Spectrum Signal With A Rotating Reference Code, And Produces In Each Sampling Instance N Correlation Lags Corresponding To The Correlation Of The Received Signal With 0, 1, . . . , N-1 Lags (Or Delays) Of The Rotating Reference Code, Wherein N Is The Length Of The Rotating Reference Code. The Rotating Reference Code Is Time-Variant And Is Generated By A Rotation Of A Basic Reference Code. The Received Signal, Possibly Embedded In Noise And Interference, Consists Of Periodic Replicas Of The Basic Reference Code With Or Without Data Modulation. The First Embodiment Of The Present Invention Describes A Method And Apparatus Of An All-Lag Rotating-Reference Correlator Which Is Applicable To Situations Where Data Modulation Is Not Present In The Received Signal. The Second Embodiment Of The Present Invention Describes A Method And Apparatus Of An All-Lag Rotating-Reference Correlator Which Is Applicable For Situations Where Data Modulation Is Present In The Received Signal. Corresponding Methods And Apparatus Are Also Described When Only A Number Of Selected Correlation Lags Are Required To Be Generated. Each Apparatus Comprises Storage Means For Storing Spread-Spectrum Signal Samples, Subtraction Means, A Plurality Of Multiplication Means Each Of Which Computes The Multiplication Result For The Output Of Subtraction Means And An Element Of Rotating Reference Code, Storage Means For Storing Correlation Lags, And A Plurality Of Addition Means.
 
patents.description.assigneeUniv Hong Kong [Hk]
 
patents.description.ccUS
 
patents.description.countryUnited States of America
 
patents.description.kindB1
 
dc.description.naturepublished_or_final_version
 
patents.identifier.applicationUS 09/607647
 
dc.identifier.citationUS Patent 6847676. Washington, DC: US Patent and Trademark Office (USPTO), 2005 [How to Cite?]
 
patents.identifier.grantedUS 6847676
 
dc.identifier.hkuros102739
 
patents.identifier.hkutechidEEE-1999-00027
 
dc.identifier.urihttp://hdl.handle.net/10722/142125
 
patents.relation.familyUS 6847676 (B1) 2005-01-25
 
patents.relation.familyUS 6868115 (B1) 2005-03-15
 
dc.relation.isreferencedbyUS 2008298499 (A1) 2008-12-04
 
dc.relation.isreferencedbyUS 8121181 (B2) 2012-02-21
 
dc.relation.isreferencedbyUS 2007230633 (A1) 2007-10-04
 
dc.relation.isreferencedbyUS 7680229 (B2) 2010-03-16
 
dc.relation.isreferencedbyUS 2005035904 (A1) 2005-02-17
 
dc.relation.isreferencedbyUS 7057553 (B2) 2006-06-06
 
dc.relation.isreferencedbyUS 7072618 (B1) 2006-07-04
 
dc.relation.referencesUS 5022047 (A) 1991-06-04
 
dc.relation.referencesUS 6198765 (B1) 2001-03-06
 
dc.relation.referencesUS 6208291 (B1) 2001-03-27
 
dc.relation.referencesUS 6289041 (B1) 2001-09-11
 
dc.relation.referencesUS 6330292 (B1) 2001-12-11
 
dc.relation.referencesUS 6611512 (B1) 2003-08-26
 
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License For Public Patent Documents
 
dc.titleAll-Lag Spread-Spectrum Correlators With Rotating References
 
dc.typePatent
 
patents.typePatent_granted
 
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