Apparatus, and associated method, for communication system utilizing space-generated multilevel coding
AssigneeNokia Corporation
InventorAdrian Boariu
Life of this patent
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Abstract
Apparatus, and an associated method, for forming a space-generated multilevel coding scheme for a radio communication system. Two or more modulators are positioned at a sending station. The modulators modulate, pursuant to separate modulation schemes, data that is to be communicated by the sending station. The modulation schemes are lower-order modulation schemes. The modulated data is communicated to a receiving station, and detected at a least single receive antenna. The modulated symbols formed by the separate modulators are superimposed theretogether and form symbols of a higher order modulation scheme.
Claims18
Apparatus for a first communication station operable in a communication system at least to send data, sourced at a data source, upon a communication channel, said apparatus comprising:
- a set of at least two modulators coupled to receive corresponding portions of a representation of the data to be sent by the communication station, said set of modulators for modulating the corresponding portions of the representation of the data pursuant to the corresponding modulation scheme to form the corresponding modulated symbols, the said corresponding modulated symbols being allowable values selected from the corresponding constellation of the corresponding modulator;
- and
- the said constellations pertaining to corresponding modulators forming a set of constellations, selected such that due to superimposition effect upon one another, generate higher-order modulation symbols, selected pursuant to a higher-order constellation.
In a radio communication system having a first communication station operable at least to send data pursuant to a space diversity scheme upon a communication channel formed of a first and at least a second communication channel path, an improvement of apparatus for a second communication station positioned to receive the data sent by the first communication station, said apparatus comprising:
- at least one antenna positioned to detect the data pursuant to the space diversity scheme, said antenna for converting the data detected thereat into electrical form as a receive signal, the receive signal of values of the data sent upon the first and the at least the second communication path superimposed theretogether;
- a feedback generator adapted to receive indications of communication channel indicia associated with the first and the at least second communication channel paths, said feedback generator for generating feedback values for return to the first communication station to be used thereat, the feedback values selected to facilitate increase of constellation-symbol separation distance of data symbols of the receive signal formed of the data sent upon the first and the second communication path superimposed theretogether.
A method for facilitating communications in a communication system having a first communication station operable at least to send data, sourced at a data source, upon a communication channel, said method comprising:
- modulating at least a first portion of a representation of the data pursuant to a first modulation scheme to form first modulated symbols, the first modulation scheme utilizing a first constellation set of allowable symbol values;
- and
- modulating at least a second portion of the representation of the data pursuant to at least a second modulation scheme to form at least second modulated symbols, the second modulation scheme utilizing a second constellation set of allowable symbol values, the first and second modulation schemes, respectively, selected such that the first and second modulated symbols, due to a superimposition effect upon one another, form higher-order modulation symbols, selected pursuant to a higher-order modulation scheme.
Dependencies are inferred from the claim text.