Apparatus and method for cyclic delay diversity in multiple-antenna wireless communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsJae-Hyok Lee, Jae-Ho Jeon, Sung-Kwon Jo
Life of this patent
Estimating the term…
Abstract
A cyclic delay diversity (CDD) technique in a multiple-antenna broadband wireless communication system is provided. An apparatus in the multiple-antenna broadband wireless communication system includes: a controller for selecting at least one sub-carrier to which CDD is applied; at least one shifter for shifting a phase of a signal mapped to the at least one selected sub-carrier; and an operator for converting the signal, which is mapped to the at least one selected sub-carrier and whose phase is shifted, and other signals mapped to the remaining sub-carriers into time-domain signals.
Claims20
An apparatus for transmitting a signal in a multiple-antenna wireless communication system, the apparatus comprising:
- a controller configured to select at least one sub-carrier assigned to at least one receiving end to which beam-forming is not applied as the at least one selected sub-carrier to which a cyclic delay diversity is applied, and compute a phase shift value based on a sub-carrier index;
- at least one shifter configured to shift a phase of a signal mapped to the at least one selected sub-carrier by the phase shift value;
- and
- an operator configured to convert the signal, which is mapped to the at least one selected sub-carrier and whose phase is shifted by the phase shift value, and other signals mapped to the remaining sub-carriers into time-domain signals.
A method of transmitting a signal in a multiple-antenna wireless communication system, the method comprising:
- selecting at least one sub-carrier assigned to at least one receiving end, to which beam-forming is not applied, as the at least one sub-carrier to which a cyclic delay diversity is applied;
- compute a phase shift value based on a sub-carrier index;
- shifting a phase of a signal mapped to the at least one selected sub-carrier by the phase shift value;
- and
- converting the signal, which is mapped to the at least one selected sub-carrier and whose phase is shifted by the phase shift value, and other signals mapped to the remaining sub-carriers into time-domain signals.
An apparatus for transmitting a signal in a multiple-antenna wireless communication system, the apparatus comprising:
- a controller configured to use scheduling information to determine whether a sub-carrier is assigned to a receiving end that requires cyclic delay diversity, the receiving end that requires cyclic delay diversity comprising a receiving end to which beam-forming is not applied, and compute a phase shift value based on a sub-carrier index;
- and
- a shifter configured to shift a phase of a signal mapped to the sub-carrier by the phase shift value when the sub-carrier is determined to be assigned to a receiving end that requires cyclic delay diversity.
Dependencies are inferred from the claim text.