http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2410982-C
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| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L1-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04L1-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B7-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B7-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04J99-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B7-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04B7-26 |
| filingDate | 2001-06-01^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2009-03-17^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_781879dc7fc39d7904b4aad7d745ed9b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_04db7e4262b19e725ffcccb93680958e |
| publicationDate | 2009-03-17^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2410982-C |
| titleOfInvention | Closed loop feedback system for improved down link performance |
| abstract | A method includes receiving at least two space-time coded signals from an antenna system associated with a first station, determining complex channel state information based on the received space-time coded signals, and sendin g the complex channel state information to the first station. In an alternativ e embodiment, a method includes transmitting at least two space-time coded signals in respective beams of a multi-beam antenna array, measuring a chann el impulse response for each space-time coded signal at a second station, and sending an indicia of a selected set of least attenuated signals from the second station to the first station. The multi-beam antenna array is associated with a first station. The beams transmit a signature code embedde d in each respective space-time coded signal, and the signature codes are orthogonal so that the second station can separate and measure the channel impulse response corresponding to each space-time coded signal. The space-ti me coded signals include the selected set of least attenuated signals and a remaining set of most attenuated signals. In an alternative embodiment, a method includes selecting at least two beams of plural beams formed by a mul ti- beam antenna array associated with a first station for transmission of a corresponding at least two space-time coded signals produced by a space-time encoder, determining a time delay associated with each of the at least two space-time coded signals as received in each respective beam, and setting in to a variable delay line the time delay corresponding to each beam, each variab le delay line being coupled between the multi-beam antenna array the space-time encoder. |
| priorityDate | 2000-06-02^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID2159 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419480116 |
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