Downlink precoding method, device and base station

A precoding and algorithmic technology, applied in the direction of radio transmission system, advanced technology, electrical components, etc., can solve problems such as multiple iterations
CN113746512AActive Publication Date: 2021-12-03HUAWEI TECH CO LTD
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUAWEI TECH CO LTD
Publication Date
2021-12-03

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The embodiment of the invention provides a downlink precoding method, a downlink precoding device and a base station. According to the downlink precoding method, after channel information of a downlink channel is obtained, a power allocation weight of the downlink channel is iteratively generated by using an MIMA algorithm, a target function of the MIMA algorithm is a mutual information lower bound function of the downlink channel, and initialization parameters of the MIMA algorithm are an initial weight and a channel feature matrix in the channel information; and performing precoding on the downlink data according to the power allocation weight to realize transmission of the downlink data. According to the downlink pre-coding method, a mutual information lower bound function is used as a target function, calculation of power and weight is completed through iteration so as to determine an optimal constellation combination, and under the condition of a small number of iterations, it is guaranteed that channel capacity allocation is maintained in a globally optimal solution when a discrete modulation constellation is conducted.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present application relates to the technical field of digital communication, and in particular to a downlink precoding method, device and base station. Background technique

[0002] Precoding is a signal processing link of digital communication, which is to pre-process the transmitted signal at the sending end when the channel state information is known. The precoding stage can be used to transmit multiple data streams in parallel through multiple transmit antennas to increase the peak transmission rate. In a multiple input multiple output (MIMO) scenario, if the number of antennas and antenna size remain unchanged, the performance of signal transmission in the scenario will be constrained, so that single user (single user, SU) and multiple user (multiple user, MU ) is limited in capacity.

[0003] In order to improve signal transmission performance, the transmission power of each channel can be allocated by adjusting the downlink weight in the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More