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A channel prediction method based on hf MIMO precoding system

A channel prediction and precoding technology, applied in baseband system components, transmission systems, radio transmission systems, etc., to achieve the effect of reducing the impact

Active Publication Date: 2018-06-26
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a channel prediction method based on the HF MIMO precoding system in order to overcome the above-mentioned defects in the prior art, which effectively solves the problem of feedback delay in the shortwave time-varying channel, and provides a reference for deploying the HF MIMO precoding system significance

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  • A channel prediction method based on hf MIMO precoding system
  • A channel prediction method based on hf MIMO precoding system
  • A channel prediction method based on hf MIMO precoding system

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[0045] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0047]A design method of HF MIMO precoding system based on channel prediction, such as figure 1 As shown, consider with N t root transmit antenna and N r For a MIMO system with one receiving antenna, the transmitted symbol vector s=[s 1 (n),s 2 (n),...,s M (n)] T , M represents the number of sub-streams, and n represents the discrete time sequence number. The transmitted symbol power satisfies tr[ss * ]=P 0 . Assuming that the MIMO channel ...

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Abstract

The invention relates to a channel prediction method based on an HF MIMO precoding system. A short wave time-varying channel is molded into an ARMA filter, time domain characteristics of the short wave channel are extracted for parameter estimation, and precoding is carried out according to SVD of predicated values of the channel. Compared with the prior art, feedback delay in the short wave channel and channel estimation error are taken into consideration, the predicated values of a channel matrix are utilized for design of the precoding matrix and a reception merging matrix, and influence of the feedback delay on the system performance can be reduced.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a channel prediction method based on an HF MIMO precoding system. Background technique [0002] Precoding technology can improve the capacity and transmission quality of MIMO systems by feeding back Channel State Information (CSI) to the transmitter. One of the important assumptions is that the feedback channel has zero delay and channel estimation is perfect. However, in an actual system, the CSI obtained by channel estimation at the receiving end and the CSI at the time of signal transmission at the sending end are not completely consistent due to the time-varying channel and the existence of feedback delay. Channel estimation at the receiving end is the starting point for obtaining CSI, and the accuracy of CSI largely depends on the accuracy of channel estimation. For a time-varying channel, the CSI must be updated continuously, otherwise the outdated C...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04B7/0456
Inventor 杨峰李悦王坤丁良辉钱良支琤
Owner SHANGHAI JIAOTONG UNIV