http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0120834-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d8ad4c8dd41faccabf61f84234d6cf55 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04J13-0048 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B2201-70701 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04J13-12 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L1-006 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L1-0041 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L27-186 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04J13-00 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04J13-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B1-707 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L27-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04J11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04J13-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L1-00 |
| filingDate | 1999-09-13^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a14b56093aaef892647c9441462e522a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e307ce5317f5a45eb040d583a7bd2315 |
| publicationDate | 2001-03-22^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-0120834-A1 |
| titleOfInvention | Method and apparatus for encoding of trellis coded direct sequence spread spectrum communication signals |
| abstract | A method and an apparatus for encoding of trellis coded direct sequence spread spectrum communication signals are provided. An input data bit sequence is received into a transmitter (900) where it is encoded and modulated using trellis code modulation. The encoding (904) comprises encoding the signal using a convolutional coder having a rate equal to 1/log2 (M), where M is a number of biorthogonal Walsh sequences. The encoded and modulated signal is spread by mapping a number of branches of the trellis code to a number of biorthogonal Walsh sequences. The mapping comprises labeling the branches of the trellis code using the biorthogonal Walsh sequences. This mapping uses the output of a convolutional coder as a memory address where the memory address contains one of a number of biorthogonal Walsh sequences. The spread signal may be a binary phase-shift keyed (BPSK) data signal, but is not so limited. A pilot signal (906) is embedded into the spread BPSK data signal to provide phase coherency between the reverse link transmitter and receiver. The BPSK data signal is then multiplexed (914) to form a quadrature phase-shift keyed (QPSK) signal. The QPSK signal is spread (930, 932) using a pseudo-random noise (PN) sequence prior to being transmitted. |
| priorityDate | 1999-09-13^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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