A channel estimation method and device for mimo system

A channel estimation and channel technology, applied in the field of MIMO system channel estimation

Active Publication Date: 2019-05-10
ZHENGZHOU UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is how to reduce the computational complexity of the MMSE channel estimation algorithm in a massive MIMO system

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  • A channel estimation method and device for mimo system
  • A channel estimation method and device for mimo system
  • A channel estimation method and device for mimo system

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Embodiment Construction

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] This embodiment provides a MIMO system channel estimation method, including:

[0047] S1: According to the number of antennas at the receiving end and the number of antennas at the transmitting end of the MIMO system, as well as the preset pilot sequence and the length of the pilot sequence, establish a model for receiving signals at t...

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Abstract

The invention provides an MIMO (Multiple-Input Multiple-Output) system channel estimation method and device. A process of carrying out the inversion operation on a channel covariance matrix and an interference covariance matrix is converted into a problem of solving a linear equation, a matrix A is decomposed, the linear equation is converted into an iterative equation by adopting a Successive Over Relaxation (SOR) iterative method, a solution of an equation which meets requirements is obtained by an iterative equation, and the obtained solution of the equation is taken into an equation of a channel estimation result so as to obtain the channel estimation result. When complexity of channel estimation calculation is reduced by utilizing the SOR iterative method, each iteration only needs M2+2M times of multiplication, i.e., the integral calculation complexity of the SOR iterative method is (with reference to the specification), wherein N represents a number of iteration times of the SOR iterative method, and M represents a dimension of the covariance matrix. N is much smaller than M, so that calculation complexity of channel estimation is reduced by one order.

Description

technical field [0001] The invention belongs to the technical field of communications, and in particular relates to a channel estimation method and device for a MIMO system. Background technique [0002] MIMO (Multiple-Input Multiple-Output) technology refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end, respectively, so that signals are transmitted and received through multiple antennas at the transmitting end and receiving end, thereby improving communication quality. It can make full use of space resources, realize multiple transmissions and multiple receptions through multiple antennas, and can double the system channel capacity without increasing spectrum resources and antenna transmission power, showing obvious advantages, and is regarded as the next generation of mobile The core technology of communication. [0003] Existing massive MIMO systems are equipped with hundreds of antennas at the base station...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04L25/02H04B7/0413
CPCH04B7/0413H04L25/0204H04L25/025
Inventor高向川李臣阳张卫党王法松靳进朱政宇李臣辉
OwnerZHENGZHOU UNIV