Back to results
US 8,036,286 B2Granted
Signal generation using phase-shift based pre-coding
AssigneeLG Electronics Inc.
InventorsMoon-Il Lee, Bin-Chul Ihm, Jin-Young Chun, Jae-Won Chang, Jin-Hyuk Jung
Life of this patent
Estimating the term…
Abstract
A phase-shift based pre-coding scheme used in a transmitting side and a receiving side that has less complexity than those of a space-time coding scheme, that can support various spatial multiplexing rates while maintaining the advantages of the phase-shift diversity scheme, that has less channel sensitivity than that of the pre-coding scheme, and that only requires a low capacity codebook is provided.
Claims4
A method of transmitting data sequences via two antennas, the method comprising:
- modulating at least one source signal to produce a plurality of modulated symbols;
- inputting the plurality of modulated symbols to a pre-coder;
- performing, at the pre-coder, a phase-shift-based pre-coding of the plurality of modulated symbols using a first matrix
- 1
- 2
-
- (
- 1
- -
- ⅇ
- j
-
-
- θ
- 1
-
- k
- ⅇ
- j
-
-
- θ
- 1
-
- k
- 1
- )
- when a multiplexing rate equals 2, and using a second matrix when the multiplexing rate equals 1, the second matrix being a 2×1 matrix and comprising only the first column of the first matrix or the second column of the first matrix,
- wherein k denotes a resource index and θ1 denotes a phase angle;
- and
- transmitting the phase-shift-based pre-coded plurality of modulated symbols via the two antennas.
28 more elements
An apparatus for transmitting data sequences via two antennas, the apparatus comprising:
- a mapper for modulating at least one source signal to produce a plurality of modulated symbols;
- a pre-coder for receiving the plurality of modulated symbols from the mapper and performing a phase-shift-based pre-coding of the plurality of modulated symbols using a first matrix
- 1
- 2
-
- (
- 1
- -
- ⅇ
- j
-
-
- θ
- 1
-
- k
- ⅇ
- j
-
-
- θ
- 1
-
- k
- 1
- )
- when a multiplexing rate equals 2, and using a second matrix when the multiplexing rate equals 1, the second matrix being a 2×1 matrix and comprising only the first column of the first matrix or the second column of the first matrix,
- wherein k denotes a resource index and θ1 denotes a phase angle;
- and
- a transmitter for transmitting the phase-shift-based pre-coded plurality of modulated symbols via the two antennas.
27 more elements
Dependencies are inferred from the claim text.