http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0169811-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c191525eb7dae96e5dd6937f7fdf5242 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7690b3418a8fd338a2bb17755ba470fb http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_88a55b300825bce9daa28f6141977ef6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_be83525a5906fa38dd58351192044e86 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04B3-23 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B3-23 |
| filingDate | 2001-02-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d7ab4d1048da7300d4b864f98b48ed2b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f2191384027354a1a598e812a80f5d34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f4f7b53899eedf94aa6a4fb75d4437d7 |
| publicationDate | 2001-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-0169811-A1 |
| titleOfInvention | Non-linear echo cancellation for wireline modems and the like |
| abstract | The present invention, generally speaking, provides for cancellation of non-linear distortions within the echo path of a communications system by characterizing the nonlinearity, performing digital processing of a data signal to cause substantially the same nonlinearity to be applied to the data signal, and inputting a resulting data signal to a non-linear echo-cancellation path. In an exemplary embodiment, the non-linear echo-cancellation path includes as a nonlinear echo canceller a transversal filter or the like. A separate linear echo cancellation path is also provided. Training of the nonlinear echo canceller follows training of the linear echo canceller. This technique is particularly applicable to cancelling the effects of DAC nonlinearity, which can be readily characterized. Using this technique, cancellation improvement of about 3dB can readily be obtained. Alternatively, instead of achieving a lower residual echo floor, the linearity requirements for the transmit DAC can be relaxed. A lower number of bits of precision allows for lower DAC power consumption. The technique is particularly applicable to DSL applications. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-10305077-A1 |
| priorityDate | 2000-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.