Back to results
US 6,807,234 B2Granted
Method and apparatus for constellation mapping and bitloading in multi-carrier transceivers, such as DMT-based DSL transceivers
AssigneeIntel Corporation
InventorCarl Christian Hansen
Life of this patent
Estimating the term…
Abstract
A multi-carrier transceiver, such as a DMT-based ADSL transceiver, has separate processing paths for different information types, such as voice, data, video, etc. Each processing path can include separate scrambling, interleaving, bit loading or tone ordering, and constellation encoding. In this manner, specific bit loading or tone ordering can be performed for each of the different information types, such that transmission carriers are selected for optimal bit rates and error rates.
Claims29
An apparatus, comprising:
- a plurality of separate processing paths, each of the separate processing paths having a tone ordering unit coupled to receive information of a type different from information received by another processing path and to assign the received information to carrier channels designated for that information type based on use of a separate bit loading algorithm for each processing path;
- and
- a constellation encoder unit coupled to receive outputs of the tone ordering units and to generate signals corresponding to constellations representative of the carrier channels to which the received information are assigned.
A system, comprising:
- a plurality of information sources, each information source generates information of a type different from information generated by another information source;
- a plurality of separate processing paths correspondingly coupled to the plurality of information sources, each of the separate processing paths having a tone ordering unit coupled to receive information sent by the information source that corresponds to that processing path and to assign the received information to carrier channels designated for the information type sent along that processing path based on use of a separate bit loading algorithm for each processing path;
- and
- a constellation encoder unit coupled to receive outputs of the tone ordering units and to generate signals corresponding to constellations representative of the carrier channels to which the received information are assigned.
1 more element
A method, comprising:
- designating a plurality of separate processing paths to each process information of a type different from information capable of being processed by another processing path;
- for one of the separate processing paths, identifying carrier channels designated for the information type corresponding to information processed along that processing path based on use of a separate bit loading algorithm for each processing path;
- and
- generating signals corresponding to constellations representative of the identified carrier channels.
1 more element
An article of manufacture, comprising:
- a machine-readable medium having stored thereon instructions to:
- determine a type of information received along separate processing paths, each of the separate processing paths corresponding to a different information type;
- select a tone ordering unit in one of the separate processing paths that corresponds to the determined information type;
- using the selected tone ordering unit, assign the received information to carrier channels designated for the determined information type based on use of a separate bit loading algorithm for each processing path.
1 more element
Dependencies are inferred from the claim text.