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A precoding processing method and system for uplink open-loop spatial multiplexing

A technology for open-loop spatial multiplexing and processing methods, which is applied in the field of precoding processing methods and systems for uplink open-loop spatial multiplexing, and can solve the problem that the open-loop spatial multiplexing of the LTE-A system cannot be realized, and the LTE-A system is not provided. System precoding processing method Precoding codebook and other issues

Active Publication Date: 2011-12-07
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0022] In order to ensure the performance of users with higher mobile speeds, the LTE-A system needs to introduce uplink open-loop spatial multiplexing, but the precoding processing method and precoding for the uplink open-loop spatial multiplexing of the LTE-A system are not given in the prior art The precoding codebook used during processing, so that the uplink open-loop spatial multiplexing of the LTE-A system cannot be realized

Method used

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  • A precoding processing method and system for uplink open-loop spatial multiplexing
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  • A precoding processing method and system for uplink open-loop spatial multiplexing

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Embodiment 1

[0054] The N precoding codewords means that when the N elements corresponding to the same element index are sorted along the granularity sequence number corresponding to the precoding codeword to which the element belongs, the phase angles of the N elements change in a clockwise or counterclockwise order N codewords of ;

[0055] or,

[0056] The N precoding codewords means that the N elements corresponding to the same element index are the same, or the phase angles of the N elements are clockwise or counterclockwise when sorting along the granularity sequence numbers corresponding to the precoding codewords to which the elements belong. N codewords whose order changes;

[0057] Wherein, the element index refers to the row and column index of the element in the precoding codeword.

[0058] In the application, the above N elements change in a clockwise or counterclockwise order, and can be changed in accordance with equal phase angle spacing, for example, the phase angle spac...

Embodiment 2

[0060] The N precoding codewords in the second embodiment refer to: the maximum N precoding codewords satisfying the minimum chordal distance value.

[0061] If the maximum value of the minimum chord distance value of the precoding codewords in multiple sets of precoding codebooks is the same, the predefined rule is the precoding codebook corresponding to the maximum value of the average chord distance; if there are multiple sets of precoding codebooks The maximum value of the average chord distance is the same, and the predefined rule is to randomly select a group. The formula for calculating the chord distance is in‖‖ F is the Frobenius norm (Frobenius norm), and the minimum chord distance refers to the minimum value of all chord distances calculated by combining 4 codewords in pairs. The average chord distance refers to the average value of all chord distances calculated by combining four codewords in pairs.

[0062] For example, when the number of transmission antenna ...

specific Embodiment 1

[0068] Assuming that the N precoding codewords of open-loop spatial multiplexing are used in units of subcarriers; the precoding codewords of uplink open-loop spatial multiplexing are selected from the existing codebooks of closed-loop spatial multiplexing, and the uplink open-loop spatial multiplexing The maximum number of layers supported by multiplexing is 2; the N value agreed upon by the base station and the UE in advance: when there are 2 transmission antenna ports, when the number of layers υ=1, N=4; when 4 transmission antenna ports, when the number of layers υ= When 1, N=4; when the number of layers υ=2, N=4.

[0069] 2 Transmission antenna ports, when the number of layers υ=1, an example of performing uplink open-loop spatial multiplexing precoding processing according to the above rules is: cyclically use 4 precoding codewords of open-loop spatial multiplexing in units of subcarriers, That is, the four precoding codeword indexes used by the subcarrier m are n=mod(m,...

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Abstract

A precoding method and system for uplink open-loop spatial multiplexing cyclically use N precoding code words for open-loop spatial multiplexing by utilizing different granularity-units. The above technical solution solves the problem of transmission during open-loop spatial multiplexing in an uplink direction in an LTE-A system, thereby ensuring good transmission performance.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to an uplink open-loop spatial multiplexing precoding processing method and system. Background technique [0002] In wireless communication, if multiple antennas are used to transmit and receive at both the transmitting end and the receiving end, then a higher data rate can be obtained by using spatial multiplexing technology, that is, the same time-frequency resource is used at the transmitting end to send multiple Data streams, and the channel coefficient matrix can be obtained through channel estimation at the receiving end, and then the data on each data stream can be demodulated. [0003] The spatial multiplexing manner includes open-loop spatial multiplexing (Open-loop spatial multiplexing) and closed-loop spatial multiplexing (Close-loop spatial multiplexing). The closed-loop spatial multiplexing refers to performing precoding processing on the signal at the trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00
CPCH04B7/0417H04B7/0404H04L1/00H04L1/06
Inventor 杨维维王瑜新郝鹏戴博梁春丽
Owner ZTE CORP
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