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Massive MIMO Robust Precoding Transmission Method

A transmission method and precoding technology, which is applied in the field of massive MIMO robust precoding transmission, can solve the problems that the BDMA transmission method cannot be applied, and achieve the effects of reducing complexity, high spectral efficiency, and improving overall efficiency

Active Publication Date: 2021-05-04
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

Since the CSI obtained by the base station has both channel mean and variance information, neither the BDMA transmission method nor the JSDM method can be applied

Method used

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  • Massive MIMO Robust Precoding Transmission Method
  • Massive MIMO Robust Precoding Transmission Method
  • Massive MIMO Robust Precoding Transmission Method

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Embodiment Construction

[0046] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0047] Such as figure 1 As shown, a massive MIMO downlink robust precoding transmission method disclosed in the embodiment of the present invention includes that the base station obtains the prior joint correlation channel model of each user channel through uplink channel detection; the base station uses the uplink pilot signal and the prior joint correlation channel model Channel model, through channel estimation and prediction to obtain the posterior joint correlation channel model of each user channel, including channel mean and variance information; the base station uses the posterior joint correlation channel model including channel mean and variance informat...

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Abstract

The invention discloses a large-scale MIMO robust precoding transmission method under imperfect channel state information. In the disclosed method, the imperfect channel state information obtained by the base station of the massive MIMO system is modeled as an a posteriori statistical channel model including channel mean value and variance information. The model takes into account the influence of channel estimation error, channel aging and spatial correlation. In the present invention, the base station uses the posterior statistical channel model to perform robust precoding transmission, which can solve the universality problem of massive MIMO to various typical mobile scenarios, and achieve high spectrum efficiency. The present invention utilizes the posterior statistical channel model including the channel mean value and variance information to perform robust precoding transmission, and the statistical channel model used is more sufficient and accurate; the robust precoding method can realize dimensionality reduction transmission, which can reduce the time required for data transmission. Pilot overhead, reducing the complexity of demodulation or detection, and improving the overall efficiency of transmission.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a large-scale MIMO robust precoding transmission method. Background technique [0002] In order to improve user experience and cope with the challenges brought about by the rapid growth of wireless data service demands and new service demands, the next-generation mobile network in the future needs to support scenarios such as high quality, high transmission rate, high mobility, high user density, and low latency. The Massive Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Ouput) technology, which greatly improves the system capacity by configuring large-scale antenna arrays in the base station (BS, BaseStation), is one of the key technologies for the future generation of wireless networks. It is also a research hotspot in recent years. [0003] The massive MIMO precoding transmission method is related to whether the performance gain that massive MIMO can provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/0456H04B17/391
CPCH04B7/0413H04B7/0456H04B17/3912H04B7/0417
Inventor 高西奇卢安安仲文
Owner SOUTHEAST UNIV
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