| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6d62cf1765af61a8e8ec164a053b29a7 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S19-246
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B2201-70715 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S19-29
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S5-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S19-21
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S19-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S19-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B1-7085
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S19-37
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S19-31
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01S19-23 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01S19-23
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01S19-31
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01S19-37
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01S19-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01S19-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01S19-21
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01S5-14 |
| filingDate |
2012-12-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f62a509c6b82443e442535b6337ccdc3 |
| publicationDate |
2013-08-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
GB-2499082-A |
| titleOfInvention |
Managing Tracking Loops for Enhanced Sensitivity Tracking of GNSS Signals |
| abstract |
The present invention relates to a method and apparatus for making accuracy improvements to a GPS receiver's navigation calculations especially when satellite signals are weak. According to a first aspect, the invention includes extreme sensitivity GNSS tracking loops such as first order code tracking loop 202 and a second order carrier AFC tracking loop 204. In embodiments, the tracking loops are self-bandwidth normalizing and the loop bandwidths automatically narrow with reduced signal strength eg. CNO. A claimed embodiment comprises a magnitude estimator that determines an estimate of GNSS signal strength, formed in block 206 from the on-frequency I and Q correlators. A tracking loop discriminator 208,212 receives the estimate and automatically sets a bandwidth of the tracking loop discriminator based on the estimate. A loop filter 210, 214 that receives an output from a tracking loop discriminator provides a value that is used to control an oscillator in a tracking loop. |
| priorityDate |
2011-12-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |