http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2001500707-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L7-0335 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L27-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L7-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L7-0029 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L27-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L7-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L7-00 |
| filingDate | 1997-09-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2001-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2001500707-A |
| titleOfInvention | Component timing recovery system for QAM |
| abstract | (57) [Summary] The present invention relates to a receiver for a transmission QAM signal composed of an in-phase (I) component and a quadrature (Q) component and representing a continuous symbol. The timing recovery system includes a source of samples (102) representing a QAM signal generated at a fixed frequency. The I component processing circuit is coupled to the sample source and demodulates the I component of the QAM signal to baseband at a first demodulator (104). And a first interpolator (108) for generating I component samples. The Q component processing circuit is coupled to the sample source and demodulates the Q component of the QAM signal to baseband, and is taken out at a timing synchronized with the transmission symbol in response to the control signal. And a second interpolator (118) for generating the Q component samples. A phase error detector (126) detects a phase error between the sample timing of the I and Q component samples from the first and second interpolators and the timing of the successive transmission symbols. An adder (130) is coupled to the phase error detector and the nominal delay source. A numerically controlled delay circuit (132) is coupled to the adder for generating respective control signals for the first and second interpolators. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7221718-B2 |
| priorityDate | 1996-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 19.