http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109462419-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B1-40 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B1-40 |
| filingDate | 2018-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2019-12-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2019-12-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109462419-B |
| titleOfInvention | A kind of LoRa scatter communication system based on DDS direct digital synthesis technique |
| abstract | The invention discloses a kind of LoRa scatter communication systems based on DDS direct digital synthesis technique, include digital baseband processor, a RF switch, an impedance matching circuit and antenna, the output end of the control terminal connection digital baseband processor of RF switch, one switch connecting pin connects the antenna, concatenates the impedance matching circuit between another switch connecting pin and ground；Digital baseband processor is used for according to LoRa protocol specification, Whitenning scrambling, Hamming Error Correction of Coding, Interleaving intertexture and De-Gray is carried out to LoRa data frame by way of programming or Digital Logical Circuits to encode, obtained Symbol symbol is subjected to CSS chirped modulation using DDS power Direct Digital Frequency Synthesis again, digital square-wave is obtained and is successively sent to RF switch；RF switch is used to control the switch state of RF switch according to the digital square-wave, signal is sent in a manner of scattering.The present invention can be realized in numeric field, at low cost, low in energy consumption, and robustness is good. |
| priorityDate | 2018-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 19.