Granted Patent: All-Lag Spread-Spectrum Correlators With Rotating References
| Title | All-Lag Spread-Spectrum Correlators With Rotating References |
|---|---|
| Granted Patent | US 6847676 |
| Granted Date | 2005-01-25 |
| Priority Date | 2000-06-30 US 09/607647 1999-06-30 US 09/141732P |
| Inventors | Ng, Tung Sang Cheng, Chin Long Yip, Kun Wah |
| Citation | US Patent 6847676. Washington, DC: US Patent and Trademark Office (USPTO), 2005 [How to Cite?] |
| Abstract | An 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. |
| References | US 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.contributor.inventor | Ng, Tung Sang |
|---|---|
| dc.contributor.inventor | Cheng, Chin Long |
| dc.contributor.inventor | Yip, Kun Wah |
| dc.date.accessioned | 2011-10-19T06:30:02Z |
| patents.date.application | 2000-06-30 |
| dc.date.available | 2011-10-19T06:30:02Z |
| patents.date.granted | 2005-01-25 |
| patents.date.priority | 2000-06-30 US 09/607647 |
| patents.date.priority | 1999-06-30 US 09/141732P |
| dc.description.abstract | An 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.assignee | Univ Hong Kong [Hk] |
| patents.description.cc | US |
| patents.description.country | United States of America |
| patents.description.kind | B1 |
| dc.description.nature | published_or_final_version |
| patents.identifier.application | US 09/607647 |
| dc.identifier.citation | US Patent 6847676. Washington, DC: US Patent and Trademark Office (USPTO), 2005 [How to Cite?] |
| patents.identifier.granted | US 6847676 |
| dc.identifier.hkuros | 102739 |
| patents.identifier.hkutechid | EEE-1999-00027 |
| dc.identifier.uri | http://hdl.handle.net/10722/142125 |
| patents.relation.family | US 6847676 (B1) 2005-01-25 |
| patents.relation.family | US 6868115 (B1) 2005-03-15 |
| dc.relation.isreferencedby | US 2008298499 (A1) 2008-12-04 |
| dc.relation.isreferencedby | US 8121181 (B2) 2012-02-21 |
| dc.relation.isreferencedby | US 2007230633 (A1) 2007-10-04 |
| dc.relation.isreferencedby | US 7680229 (B2) 2010-03-16 |
| dc.relation.isreferencedby | US 2005035904 (A1) 2005-02-17 |
| dc.relation.isreferencedby | US 7057553 (B2) 2006-06-06 |
| dc.relation.isreferencedby | US 7072618 (B1) 2006-07-04 |
| dc.relation.references | US 5022047 (A) 1991-06-04 |
| dc.relation.references | US 6198765 (B1) 2001-03-06 |
| dc.relation.references | US 6208291 (B1) 2001-03-27 |
| dc.relation.references | US 6289041 (B1) 2001-09-11 |
| dc.relation.references | US 6330292 (B1) 2001-12-11 |
| dc.relation.references | US 6611512 (B1) 2003-08-26 |
| dc.rights | Creative Commons: Attribution 3.0 Hong Kong License For Public Patent Documents |
| dc.title | All-Lag Spread-Spectrum Correlators With Rotating References |
| dc.type | Patent |
| patents.type | Patent_granted |