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US 2022/0190893 A1Published application
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.
Claims8
(canceled)
(canceled)
An integrated circuit comprising:
- circuitry, which, in operation, controls
- performing a precoding process on first modulated symbols s1(t) and second modulated symbols s2(t) to generate first precoded symbols z1(t) and second precoded symbols z2(t), t being an integer starting from 0 and incrementing in steps of 1;
- and
- transmitting 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:
- [
- Iz
-
-
- 1
-
- (
- t
- )
- +
- Qz
-
-
- 1
-
- (
- t
- )
- Iz
-
-
- 2
-
- (
- t
- )
- +
- Qz
-
-
- 2
-
- (
- t
- )
- ]
- =
- 1
- 2
-
- [
- 1
- 1
- 1
- 1
- e
- j
-
-
- θ
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- ]
-
- [
- Is
-
-
- 1
-
- (
- t
- )
- Qs
-
-
- 1
-
- (
- t
- )
- Is
-
-
- 2
-
- (
- t
- )
- Qs
-
-
- 2
-
- (
- t
- )
- ]
- (
- Equation
-
-
- 1
- )
- θ changes in turn according to t within a period N, θ is a value expressed in radians, and Iz1(t), Iz2(t), Is1(t), Is2(t) are in-phase component of z1(t), z2(t), s1(t), s2(t), respectively, and Qz1(t), Qz2(t), Qs1(t), Qs2(t) are quadrature component of z1(t), z2(t), s1(t), s2(t), respectively.
112 more elements
An integrated circuit comprising:
- circuitry, which, in operation, controls
- receiving first precoded symbols z1(t) and second precoded symbols z2(t) transmitted from different antennas, 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;
- performing a demodulation process on the first precoded symbols z1(t) and the second precoded symbols z2(t);
- wherein the precoding process is expressed by a following Equation 1:
- [
- Iz
-
-
- 1
-
- (
- t
- )
- +
- Qz
-
-
- 1
-
- (
- t
- )
- Iz
-
-
- 2
-
- (
- t
- )
- +
- Qz
-
-
- 2
-
- (
- t
- )
- ]
- =
- 1
- 2
-
- [
- 1
- 1
- 1
- 1
- e
- j
-
-
- θ
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- ]
-
- [
- Is
-
-
- 1
-
- (
- t
- )
- Qs
-
-
- 1
-
- (
- t
- )
- Is
-
-
- 2
-
- (
- t
- )
- Qs
-
-
- 2
-
- (
- t
- )
- ]
- (
- Equation
-
-
- 1
- )
- θ changes in turn according to t within a period N, θ is a value expressed in radians, and Iz1(t), Iz2(t), Is1(t), Is2(t) are in-phase component of z1(t), z2(t), s1(t), s2(t), respectively, and Qz1(t), Qz2(t), Qs1(t), Qs2(t) are quadrature component of z1(t), z2(t), s1(t), s2(t), respectively.
111 more elements
A communication apparatus comprising:
- a receiver, which in operation, receives first precoded symbols z1(t) and second precoded symbols z2(t) transmitted from different antennas, the first precoded symbols z1(t) and the second precoded symbols z2(t) being generated by precoding first modulated symbols s1(t) and second modulated symbols s2(t) with a precoding matrix, t being an integer an integer starting from 0 and incrementing in steps of 1;
- and
- circuitry, which in operation, performed a demodulation process of the first precoded symbols z1(t) and the second precoded symbols z2(t), wherein the precoding process is expressed by a following Equation 1:
- [
- Iz
-
-
- 1
-
- (
- t
- )
- +
- Qz
-
-
- 1
-
- (
- t
- )
- Iz
-
-
- 2
-
- (
- t
- )
- +
- Qz
-
-
- 2
-
- (
- t
- )
- ]
- =
- 1
- 2
-
- [
- 1
- 1
- 1
- 1
- e
- j
-
-
- θ
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- ]
-
- [
- Is
-
-
- 1
-
- (
- t
- )
- Qs
-
-
- 1
-
- (
- t
- )
- Is
-
-
- 2
-
- (
- t
- )
- Qs
-
-
- 2
-
- (
- t
- )
- ]
- (
- Equation
-
-
- 1
- )
- θ changes in turn according to t within a period N, θ is a value expressed in radians, and Iz1(t), Iz2(t), Is1(t), Is2(t) are in-phase component of z1(t), z2(t), s1(t), s2(t), respectively, and Qz1(t), Qz2(t), Qs1(t), Qs2(t) are quadrature component of z1(t), z2(t), s1(t), s2(t), respectively.
110 more elements
A communication method comprising:
- receiving first precoded symbols z1(t) and second precoded symbols z2(t) transmitted from different antennas, the first precoded symbols z1(t) and the second precoded symbols z2(t) being generated by precoding first modulated symbols s1(t) and second modulated symbols s2(t) with a precoding matrix, t being an integer starting from 0 and incrementing in steps of 1;
- and
- performing a demodulation process on the first precoded symbols z1(t) and the second precoded symbols z2(t),
- wherein the precoding process is expressed by a following Equation 1:
- [
- Iz
-
-
- 1
-
- (
- t
- )
- +
- Qz
-
-
- 1
-
- (
- t
- )
- Iz
-
-
- 2
-
- (
- t
- )
- +
- Qz
-
-
- 2
-
- (
- t
- )
- ]
- =
- 1
- 2
-
- [
- 1
- 1
- 1
- 1
- e
- j
-
-
- θ
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- ]
-
- [
- Is
-
-
- 1
-
- (
- t
- )
- Qs
-
-
- 1
-
- (
- t
- )
- Is
-
-
- 2
-
- (
- t
- )
- Qs
-
-
- 2
-
- (
- t
- )
- ]
- (
- Equation
-
-
- 1
- )
- θ changes in turn according to t within a period N, θ is a value expressed in radians, and Iz1(t), Iz2(t), Is1(t), Is2(t) are in-phase component of z1(t), z2(t), s1(t), s2(t), respectively, and Qz1(t), Qz2(t), Qs1(t), Qs2(t) are quadrature component of z1(t), z2(t), s1(t), s2(t), respectively.
111 more elements
A base station comprising:
- circuitry, which in operation, performs a precoding process on first modulated symbols s1(t) and second modulated symbols s2(t) to generate first precoded symbols z1(t) and second precoded symbols z2(t), t being an integer starting from 0 and incrementing in steps of 1;
- and
- a transmitter, which in operation, transmits the first precoded symbols z1(t) and the second precoded symbols z2(t) from different antennas;
- wherein the precoding process is expressed by a following Equation 1:
- [
- Iz
-
-
- 1
-
- (
- t
- )
- +
- Qz
-
-
- 1
-
- (
- t
- )
- Iz
-
-
- 2
-
- (
- t
- )
- +
- Qz
-
-
- 2
-
- (
- t
- )
- ]
- =
- 1
- 2
-
- [
- 1
- 1
- 1
- 1
- e
- j
-
-
- θ
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- ]
-
- [
- Is
-
-
- 1
-
- (
- t
- )
- Qs
-
-
- 1
-
- (
- t
- )
- Is
-
-
- 2
-
- (
- t
- )
- Qs
-
-
- 2
-
- (
- t
- )
- ]
- (
- Equation
-
-
- 1
- )
- θ changes in turn according to t within a period N, θ is a value expressed in radians, and Iz1(t), Iz2(t), Is1(t), Is2(t) are in-phase component of z1(t), z2(t), s1(t), s2(t), respectively, and Qz1(t), Qz2(t), Qs1(t), Qs2(t) are quadrature component of z1(t), z2(t), s1(t), s2(t), respectively.
111 more elements
A communication method comprising:
- performing a precoding process on first modulated symbols s1(t) and second modulated symbols s2(t) to generate first precoded symbols z1(t) and second precoded symbols z2(t), t being an integer starting from 0 and incrementing in steps of 1;
- and
- transmitting the first precoded symbols z1(t) and the second precoded symbols z2(t) from different antennas;
- wherein the precoding process is expressed by a following Equation 1:
- [
- Iz
-
-
- 1
-
- (
- t
- )
- +
- Qz
-
-
- 1
-
- (
- t
- )
- Iz
-
-
- 2
-
- (
- t
- )
- +
- Qz
-
-
- 2
-
- (
- t
- )
- ]
- =
- 1
- 2
-
- [
- 1
- 1
- 1
- 1
- e
- j
-
-
- θ
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- -
- e
- j
-
-
- θ
- ]
-
- [
- Is
-
-
- 1
-
- (
- t
- )
- Qs
-
-
- 1
-
- (
- t
- )
- Is
-
-
- 2
-
- (
- t
- )
- Qs
-
-
- 2
-
- (
- t
- )
- ]
- (
- Equation
-
-
- 1
- )
- θ changes in turn according to t within a period N, θ is a value expressed in radians, and Iz1(t), Iz2(t), Is1(t), Is2(t) are in-phase component of z1(t), z2(t), s1(t), s2(t), respectively, and Qz1(t), Qz2(t), Qs1(t), Qs2(t) are quadrature component of z1(t), z2(t), s1(t), s2(t), respectively.
111 more elements
Dependencies are inferred from the claim text.