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US 12,671,470 B2Granted
Receiving method and receiving apparatus
AssigneeSun Patent Trust
InventorsYutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
Life of this patent
Estimating the term…
Abstract
All data symbols used in data transmission of a modulated signal are precoded by switching between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol along the frequency axis and the time axis all differ. A modulated signal with such data symbols arranged therein is transmitted.
Claims4
An integrated circuit comprising:
- generation circuitry, which in operation, controls a generation of first precoded symbols z1(t) and second precoded symbols z2(t), the first precoded symbols z1(t) and the second precoded symbols z2(t) being generated by performing a precoding process on the first modulated symbols s1(t) and the second modulated symbols s2(t), t being an integer starting from 0 and incrementing in steps of 1;
- and
- transmission circuitry, which in operation, controls a transmission of the first precoded symbols z1(t) and the second precoded symbols z2(t) from different antennas,
- wherein the precoding process is expressed by the following Equation 1:
- [
- z
-
- 1
-
- (
- t
- )
- z
-
- 2
-
- (
- t
- )
- ]
- =
- 1
- a
- 2
- +
- 1
- [
- e
- j
- *
- 0
- α
- *
- e
- j
- *
- 0
- α
- *
- e
- j
- *
- θ
- e
- j
- *
- (
- θ
- +
- λ
- )
- ]
- [
- s
-
- 1
-
- (
- t
- )
- s
-
- 2
-
- (
- t
- )
- ]
- (
- Equation
-
- 1
- )
- θ changes in turn according to t within a period N, θ is a value expressed in radians, λ is a value expressed in radians, and α is a value which is less than 1.
71 more elements
A integrated circuit comprising:
- generation circuitry, which in operation, controls a generation of first precoded symbols z1(t) and second precoded symbols z2(t), the first precoded symbols z1(t) and the second precoded symbols z2(t) being generated by performing a precoding process on the first modulated symbols s1(t) and the second modulated symbols s2(t), t being an integer starting from 0 and incrementing in steps of 1;
- and
- transmission circuitry, which in operation, controls a transmission of the first precoded symbols z1(t) and the second precoded symbols z2(t) from different antennas,
- wherein the precoding process is expressed by the following Equation 1:
- [
- z
-
- 1
-
- (
- t
- )
- z
-
- 2
-
- (
- t
- )
- ]
- =
- 1
- a
- 2
- +
- 1
- [
- 1
- a
- α
- *
- e
- j
- *
- θ
- e
- j
- *
- (
- θ
- +
- λ
- )
- ]
- [
- s
-
- 1
-
- (
- t
- )
- s
-
- 2
-
- (
- t
- )
- ]
- (
- Equation
-
- 1
- )
- θ changes in turn according to t within a period N, θ is a value expressed in radians, λ is a value expressed in radians, and α is a value which is less than 1.
63 more elements
Dependencies are inferred from the claim text.