| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4785f22f2e53fdf8d51c9dbf8ee2a170 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L2027-0057
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L2027-0036
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L2027-0067
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L2001-0096 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L27-2647
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B10-25
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L1-203
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N21-6118
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L27-2657
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L27-2665
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L5-023
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L5-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L25-03866
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L12-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L27-2626
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L27-2614
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L27-2652
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L1-0061
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L27-2601
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B10-272
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L1-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N21-6168
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04J14-0298
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N7-17309
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B1-707
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04J3-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04L1-0057 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L27-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N7-173
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L1-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L1-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04M3-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04J14-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04J3-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B10-272
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L27-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L25-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04J11-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L5-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L5-06 |
| filingDate |
1996-02-06^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0fcf9845abdfc2bf2d1d0eda62134201
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_56f1e2a4c39f185fc59b74d6275e0c15
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8506f41a7aa6cbe5a0072bf2989cb602
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c7806b0e03d92de0c12b0b6c714fd761
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e24e9a123483800ae3e2d87d5e6595af
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c3d727b1c110b2e3983b28ec46094dee
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d9b4c4066d0225cd847038bcb56fb18b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9f61fb6e0bd510dbd502fc93d529cdf9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_77f62eba7e0c879a2e3a5ce9fde4c108
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_653e2c8deddcf02af9c9d3b366a73666
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_898de3f8b7d8ec030d61c5c278bf7bd3 |
| publicationDate |
1997-12-17^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CZ-248797-A3 |
| titleOfInvention |
Bidirectional multipoint communication system |
| abstract |
The communication system includes a hybrid fiber/coax distribution network. A head end provides for downstream transmission of telephony and control data in a first frequency bandwidth over the hybrid fiber/coax distribution network and reception of upstream telephony and control data in a second frequency bandwidth over the hybrid fiber/coax distribution network. The head end includes a head end multicarrier modem for modulating at least downstream telephony information on a plurality of orthogonal carriers in the first frequency bandwidth and demodulating at least upstream telephony information modulated on a plurality of orthogonal carriers in the second frequency bandwidth. The head end further includes a controller operatively connected to the head end multicarrier modem for controlling transmission of the downstream telephony information and downstream control data and for controlling receipt of the upstream control data and upstream telephony information. The system further includes service units, each service unit operatively connected to the hybrid fiber/coax distribution network for upstream transmission of telephony and control data in the second frequency bandwidth and for receipt of the downstream control data and telephony in the first frequency bandwidth. Each service unit includes a service unit multicarrier modem for modulating at least the upstream telephony information on at least one carrier orthogonal at the head end terminal to another carrier in the second frequency bandwidth and for demodulating at least downstream telephony information modulated on at least a band of a plurality of orthogonal carriers in the first frequency bandwidth. Each service unit also includes a controller operatively connected to the service unit multicarrier modem for controlling the modulation of and demodulation performed by the service unit multicarrier modem. A method of monitoring communication channels, a distributed loop method for adjusting transmission characteristics to allow for transmission of data in a multi-point to point communication system, a polyphase filter technique for providing ingress protection and a scanning method for identifying frequency bands to be used for transmission by service units are also included. <IMAGE> |
| priorityDate |
1995-02-06^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |