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Precoding method and device

A precoding and iterative technology, applied in the field of communication, can solve the problems of antenna transmission power reduction, antenna power utilization reduction, power waste, etc.

Active Publication Date: 2020-12-29
HUAWEI TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

In this way, except for the antenna with the highest transmission power, the transmission power of other antennas is reduced, resulting in a reduction in the power utilization of the antenna, which in turn causes a problem of power waste

Method used

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Embodiment Construction

[0054] First of all, when words such as "exemplary" or "for example" are mentioned below, they are used as examples, illustrations or illustrations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application shall not be construed as being more preferred or more advantageous than other implementations or design solutions. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

[0055] Unless otherwise specified, " / " herein generally means that the contextual objects are an "or" relationship, for example, A / B can mean A or B. The term "and / or" is only an association relationship describing associated objects, indicating that there may be three types of relationships, for example, A and / or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. situation. In addition, in the description of the present application, "pl...

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Abstract

The invention provides a precoding method and device, relates to the technical field of communication, and can improve the power utilization rate of an antenna. The method comprises the following steps: determining a generalized inverse matrix m = 1, 2,..., J of a channel value matrix Hm of K users in the mth iteration of J times of iteration operation, J being greater than or equal to 1 and lessthan or equal to M-K + 1, J being an integer, and M being the number of antennas; selecting an antenna index nm and an updating coefficient alpha m corresponding to the antenna index nm according to the set S1m-1, wherein S1m-1 is a set of n which is not selected in the antenna indexes n of the M antennas until the m-1th iteration is finished; determining a weight matrix Wm according to the sum alpha m; and assigning a row corresponding to nm in the Wm to a row corresponding to nm in a final weight matrix Wopt, the Wopt being used for adjusting the transmitting power of at least J antennas inthe M antennas to a preset maximum transmitting power P after the J iterative operations are finished.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a precoding method and device. Background technique [0002] In a multi-antenna multi-user transmission system, in order to avoid the influence of the orthogonality between multi-users, the transmission power of the antenna exceeds the maximum value. The base station generally uses a Power Limited Eigen Beamforming (PEBF) algorithm to perform maximum transmit power normalization processing on transmit power of multiple antennas. That is, the initial transmit power of the multiple antennas is divided by the transmit power of the antenna with the highest transmit power among the multiple antennas. In this way, except for the antenna with the highest transmission power, the transmission power of the other antennas is reduced, resulting in a reduction in the power utilization rate of the antennas, and further causing a problem of power waste. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0426H04W52/36H04B7/0456
CPCH04B7/0456H04W52/367H04B7/0426H04W52/42H04B7/0452
Inventor 郭森宝李桂宝王智鹰
Owner HUAWEI TECH CO LTD
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