Mixed digital-analog pre-coding method for large-scale MIMO system

A digital-analog hybrid and precoding technology, applied in the field of communication, can solve the problems of high implementation complexity and achieve the effect of high spectral efficiency

Active Publication Date: 2017-04-26
SHAANXI REACTOR MICROELECTRONICS
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Problems solved by technology

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a digital-analog hybrid precoding method in a massive MIMO system, aiming to solve the problem of the existing digital-analog hybrid precoding scheme based on shared antenna design. Problems with high complexity

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Embodiment 1

[0049] The model of the digital-analog hybrid precoding scheme in the massive MIMO system adopted in the embodiment of the present invention is as follows figure 2 As shown, where the transmitter is equipped with N T transmitting antennas, N S RF links, and the receiving end is equipped with N R transmitting antennas, N S radio frequency link. The wireless link between transceiver can be divided by ×N R N T Dimensional channel matrix H represents.

[0050] like image 3 As shown, the implementation steps of the embodiment of the present invention are as follows:

[0051] Step 1, the transmitter calculates the ideal precoding matrix F opt ,Specific steps are as follows:

[0052] 1a) The transmitting end estimates the MIMO channel according to the feedback signal of the receiving end to obtain the estimation of the MIMO channel matrix The specific estimation method can be found in the literature: H.Jin, D.Gesbert, M.Filippou, and Y.Liu, "A coordinated approach to ch...

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Abstract

The invention discloses a mixed digital-analog pre-coding method for a large-scale MIMO system. The method comprises steps that an ideal pre-coding matrix is calculated by a transmitting end; pre-coding matrixes of a simulation domain and a digital domain are respectively calculated by the transmitting end; a sending signal is pre-coded by the transmitting end; an ideal merging matrix is calculated by a receiving end; merging matrixes of the simulation domain and the digital domain are respectively calculated by the receiving end; receiving signals are merged by the receiving end. The method is advantaged in that a problem of over-high realization complexity of a mixed digital-analog domain pre-coding scheme in the prior art is solved, moreover, relatively high frequency spectrum efficiency is acquired, and innovation and practicality are realized.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a digital-analog hybrid precoding method in a massive MIMO system. Background technique [0002] Multiple-input multiple-output (MIMO) technology can make full use of space resources to combat the fading of wireless channels, thereby improving the reliability and spectrum utilization of the communication system without increasing the system bandwidth and transmission power. At present, MIMO technology has been widely used in various mobile communication standards, such as HSDPA in UMTS system, LTE / LTE-A in 3GPP, WiMAX in IEEE 802.16e / m and WLAN / in IEEE 802.11n / ac / ah WI-F. In the above-mentioned systems, the antennas at both ends of the transceiver are relatively small, that is, the number of antennas of the base station or the access point does not exceed 8 at most, and the number of antennas of the user does not exceed 4 at most. [0003] The 5th generation (5G) mobile ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0413H04B7/0456
CPCH04B7/0413H04B7/0456
Inventor 高洋葛建华高宏伟高明刘刚李毅张南
Owner SHAANXI REACTOR MICROELECTRONICS
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