RU2008147673A

RU2008147673A - METHOD OF PHASE SHIFT, BASED ON PRELIMINARY CODING, AND RECEIVING DEVICE SUPPORTING IT

Info

Publication number: RU2008147673A
Application number: RU2008147673/09A
Authority: RU
Inventors: Мун-Иль ЛИ (KR); Мун-Иль ЛИ; Бин-Чхоль ИМ (KR); Бин-Чхоль ИМ; Чин-Ён ЧХОН (KR); Чин-Ён ЧХОН; Чжэ-Вон ЧХАН (KR); Чжэ-Вон ЧХАН; Чин-Хёк ЧЖОН (KR); Чин-Хёк ЧЖОН
Original assignee: Эл Джи Электроникс Инк. (Kr); Эл Джи Электроникс Инк.
Priority date: 2006-05-26
Filing date: 2007-05-23
Publication date: 2010-07-10
Also published as: RU2455765C2

Abstract

1. Способ передачи данных с использованием предварительного кодирования на основе фазового сдвига в системе со множеством антенн, использующий несколько поднесущих, содержащий: ! выбор матрицы предварительного кодирования из кодовой книги как части матрицы предварительного кодирования на основе фазового сдвига; ! определение диагональной матрицы для фазового сдвига как части матрицы предварительного кодирования на основе фазового сдвига; ! определение унитарной матрицы как части матрицы предварительного кодирования на основе фазового сдвига; и ! умножение произведения матрицы предварительного кодирования, диагональной матрицы и унитарной матрицы на символ соответствующей поднесущей или субполосы для выполнения предварительного кодирования. ! 2. Способ по п.1, в котором упомянутая унитарная матрица выбирается с использованием функционирующего по модулю индекса k кодовой книги для соответствующей поднесущей с размером N. ! 3. Способ по п.1, в котором упомянутое произведение матрицы предварительного кодирования, диагональной матрицы и унитарной матрицы имеет вид ! ! где k обозначает индекс поднесущей или субполосы, θi (i=1,…, R) обозначает фазовый угол, и R обозначает коэффициент пространственного мультиплексирования. ! 4. Способ по п.3, в котором, по меньшей мере, одна из упомянутых матриц: матрица предварительного кодирования, диагональная матрица и унитарная матрица изменяется со временем. ! 5. Способ по п.1, в котором упомянутая матрица предварительного кодирования выбирается на основе информации обратной связи от приемника. ! 6. Способ по п.5, в котором упомянутая информация обратной связи содержит индекс 1. A method of transmitting data using phase shift-based precoding in a multi-antenna system using multiple subcarriers, comprising:! selecting a precoding matrix from the codebook as part of a phase shift-based precoding matrix; ! determining a diagonal matrix for the phase shift as part of a precoding matrix based on the phase shift; ! determining a unitary matrix as part of a precoding matrix based on a phase shift; and! multiplying the product of the precoding matrix, the diagonal matrix and the unitary matrix by the symbol of the corresponding subcarrier or subband to perform precoding. ! 2. The method according to claim 1, wherein said unitary matrix is selected using a modulo codebook index k for the corresponding subcarrier with size N.! 3. The method according to claim 1, wherein said product of the precoding matrix, the diagonal matrix, and the unitary matrix has the form! ! where k is the index of the subcarrier or subband, θi (i = 1, ..., R) is the phase angle, and R is the spatial multiplexing coefficient. ! 4. The method of claim 3, wherein at least one of said matrices: a precoding matrix, a diagonal matrix, and a unitary matrix changes with time. ! 5. The method of claim 1, wherein said precoding matrix is selected based on feedback information from a receiver. ! 6. The method of claim 5, wherein said feedback information comprises an index

Claims

1. A method for transmitting data using phase shift-based precoding in a multi-antenna system using multiple subcarriers, comprising:

selecting a precoding matrix from the codebook as part of a phase shift-based precoding matrix;

determining a diagonal matrix for the phase shift as part of a precoding matrix based on the phase shift;

determining a unitary matrix as part of a precoding matrix based on a phase shift; and

multiplying the product of the precoding matrix, the diagonal matrix and the unitary matrix by the symbol of the corresponding subcarrier or subband to perform precoding.

2. The method according to claim 1, wherein said unitary matrix is selected using a modulo codebook index k for the corresponding subcarrier with size N.

3. The method according to claim 1, wherein said product of the precoding matrix, the diagonal matrix, and the unitary matrix has the form

where k is the index of a subcarrier or subband, θ _i (i = 1, ..., R) is the phase angle, and R is the spatial multiplexing coefficient.

4. The method of claim 3, wherein at least one of said matrices: a precoding matrix, a diagonal matrix, and a unitary matrix changes with time.

5. The method of claim 1, wherein said precoding matrix is selected based on feedback information from a receiver.

6. The method of claim 5, wherein said feedback information comprises a matrix index for a codebook.

7. A transceiver for transmitting data and performing phase shift-based precoding in a multi-antenna system using multiple subcarriers, comprising:

a precoding matrix determination unit for selecting a precoding matrix from the codebook as part of a phase shift-based precoding matrix, for determining a diagonal matrix for phase shift as a part of said phase-shift precoding matrix, for determining a unitary matrix as part of said precoding matrix phase shift coding, and to obtain a product of said precoding matrix, iagonalnoy matrix and the unitary matrix to determine said precoding matrix based on the phase shift; and

a precoding unit to multiply said specific phase-shift-based precoding matrix by the symbol of the corresponding subcarrier or subband index.

8. The transceiver according to claim 7, in which said unitary matrix is selected using a modulo codebook index k for the corresponding subcarrier with size N.

9. The transceiver according to claim 7, in which the product of the precoding matrix, the diagonal matrix and the unitary matrix has the form

10. The transceiver according to claim 9, in which at least one of said matrices: a precoding matrix, a diagonal matrix, and a unitary matrix changes with time.

11. The transceiver according to claim 7, in which said precoding matrix is selected based on feedback information from the receiver.

12. The transceiver according to claim 11, wherein said feedback information comprises a matrix index for a codebook.

13. A method for transmitting data using phase shift-based precoding in a multi-antenna system using multiple subcarriers, comprising:

determining a unitary matrix as part of said precoding matrix based on a phase shift; and

multiplying the product of the aforementioned diagonal matrix and the unitary matrix by the symbol of the corresponding subcarrier or subband to perform precoding,

wherein said phase shift-based precoding matrix according to said product of a unitary matrix and a diagonal matrix includes columns having an identical phase.

14. The method according to item 13, in which said product of the diagonal matrix and the unitary matrix has the form

where k is the index of a subcarrier or subband, θ _i (i = 1, ..., N,) is the phase angle, and R is the spatial multiplexing coefficient.

15. The method according to item 13, in which said product of the diagonal matrix and the unitary matrix has the form

16. A method of transmitting data using phase shift-based precoding in a multi-antenna system using multiple subcarriers, comprising:

determining the first and second diagonal matrices for the phase shift as part of the precoding matrix based on the phase shift;

selection from the codebook of the unitary matrix as part of said phase shift pre-coding matrix; and

multiplying the product of the first diagonal matrix, said unitary matrix and the second diagonal matrix by the symbol of the corresponding subcarrier to perform precoding.

17. The method according to clause 16, in which said product of the first diagonal matrix, the said unitary matrix and the second diagonal matrix has the form

where k is the subcarrier or subband index, θ _i (i = 1, ..., N _t ) and θ ' _j (j = 1, ..., R) are the phase angle, and R is the spatial multiplexing coefficient.