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Downlink time-varying channel prediction method based on improved Prony method

A time-varying channel and prediction method technology, which is applied in radio transmission systems, transmission monitoring, electrical components, etc., to achieve the effect of improving overall performance

Active Publication Date: 2020-03-24
HANGZHOU DIANZI UNIV
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Problems solved by technology

The traditional channel estimation method can only be applied when the CSI of the channel is fixed. For the time-varying channel, the traditional method is no longer applicable.

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  • Downlink time-varying channel prediction method based on improved Prony method
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  • Downlink time-varying channel prediction method based on improved Prony method

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Embodiment Construction

[0046] The specific embodiment of the specific solution of the present invention will be further elaborated in conjunction with the accompanying drawings.

[0047] A downlink time-varying channel prediction method based on improved Prony method, the method is applied in TDD (time division duplex) system, it is characterized in that, described downlink time-varying channel prediction method comprises the following steps:

[0048] S1. Estimate the CSI (channel state information) of the uplink: assuming that the bit error rate of the uplink system is known, the base station obtains the decoded data symbols, and estimates the CSI of the uplink according to the received signal and the decoded data symbols;

[0049] S2. Calculate a Prony coefficient according to the estimated uplink CSI;

[0050] S3. Predict the CSI at the next moment according to the Prony coefficient and design the precoding;

[0051] The base station in the TDD system has M b root antenna, for a single user wit...

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Abstract

The invention provides a downlink time-varying channel prediction method based on an improved Prony method. The downlink time-varying channel prediction method is applied to a time division duplex system, and the downlink time-varying channel prediction method comprises the following steps: S1, estimating the CSI of an uplink: assuming that the bit error rate of the uplink system is known, obtaining decoded data symbols by a base station, and estimating the CSI of the uplink according to received signals and the decoded data symbols; S2, calculating a Prony coefficient according to the estimated uplink CSI; S3, predicting the CSI at the next moment according to the Prony coefficient and designing precoding; a base station in the TDD system being provided with Mb antennas, for a single userwith a single antenna, the number of clusters being Lc, each cluster being provided with a main path, and a communication system starting from an uplink. The method can be suitable for estimating thefast time-varying channel, can accurately predict the CSI of the downlink at the future moment, and can greatly improve the overall performance of a communication system.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a downlink time-varying channel prediction method based on an improved Prony method. Background technique [0002] In a massive MIMO system, the base station is equipped with dozens to hundreds of antennas. Thanks to the large-scale antennas at the base station, the channels between different users and the base station are gradually orthogonal. Therefore, only simple signal processing techniques are used, and the system Both the data transfer rate and energy efficiency can be greatly improved. However, this advantage is based on the assumption that the base station can accurately estimate the CSI, so the acquisition of the CSI is very important to the system. If the CSI is unknown, the overall performance of the system will be greatly reduced. [0003] Based on the reciprocity of the channel in the TDD system, the CSI of the downlink and the CSI of the uplink are ...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04B17/309
CPCH04B7/0456H04B17/309
Inventor 王海泉陈跃高丹蓓叶杭黄怡
Owner HANGZHOU DIANZI UNIV
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