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Analog and digital mixed precoding mode based on codebook

An analog-to-digital mixing and precoding technology, which is applied in the directions of space transmit diversity, transmission system, energy consumption reduction, etc., can solve the problems of high energy consumption and hardware complexity, so as to ensure realizability, reduce system complexity, and improve The effect of energy efficiency

Active Publication Date: 2016-12-21
上海瀚芯实业发展合伙企业(有限合伙)
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Problems solved by technology

In mmWave systems with large-scale antennas, the application of digital precoding will bring high energy consumption and hardware complexity

Method used

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  • Analog and digital mixed precoding mode based on codebook
  • Analog and digital mixed precoding mode based on codebook
  • Analog and digital mixed precoding mode based on codebook

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Embodiment Construction

[0018] Application scenario: a downlink multi-user MISO (Multiple Input Single Output) system, in which the base station adopts a hybrid architecture, with M antennas and S radio frequency links, serving K users, and the user node is equipped with a single omnidirectional receiving antenna. Such as figure 1 shown.

[0019] Optimization objective: It can be any utility function or cost function and its corresponding constraints. Here, the minimization of transmit power is taken as the optimization objective, and the satisfied constraint is to ensure the user’s quality of service (QoS) requirements. The mathematical expression for

[0020]

[0021] in, Represents the analog domain precoding matrix;

[0022] Represents the digital domain precoding matrix;

[0023] Indicates the digital precoding matrix G BB The kth column of ;

[0024] Indicates the channel coefficient vector between the base station and the cooperative user k;

[0025] σ 2 Indicates the noise v...

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Abstract

The invention discloses an analog and digital mixed precoding mode based on a codebook. According to the method, through using analog code training, equivalent channel information can be effectively obtained, thus the optimization problem of NP-hard of analog code selection and digital precoding is converted into the optimization problem of sparse digital precoding, according to the optimized digital precoding matrix, the analog precoding code of each link is mapped, and finally the mixed precoding of analog precoding and diginal precoding is realized. The near optimal system performance can be obtained, the system complexity is reduced, the energy efficiency is improved, and the realization of the system is ensured.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a codebook-based modulus-digital hybrid precoding method. Background technique [0002] In order to meet the rapid growth of mobile data, the future wireless communication system needs to further increase the system capacity and ensure the user's QoS (Quality of Service) requirements. Since the millimeter wave (Millimeter wave) has a large bandwidth, the millimeter wave communication has become a technology with development potential in the future 5G wireless communication system. [0003] In mmWave communication systems, high-speed and high-quality communication can be achieved through beamforming technology. In order to eliminate interference between signals, a traditional MIMO communication system uses a baseband beamforming technology, and each transmitting antenna needs to be connected to an expensive radio frequency (Radio Frequency, RF) link. In mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04
CPCH04B7/0456Y02D30/70
Inventor 何世文叶日平黄永明杨绿溪洪伟
Owner 上海瀚芯实业发展合伙企业(有限合伙)
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