Massive MIMO precoding transmission method and device

Abstract

The embodiment of the present application discloses a massive multiple-input multiple-output MIMO precoding transmission method, which is used to realize wide-angle coverage of transmit power of a transmit signal in a massive MIMO system, and can improve power utilization efficiency. The method in the embodiment of the present application includes: the access network device determines the objective function according to the preset target wide coverage power pattern; the access network device uses the steepest descent method to process the precoding matrix corresponding to the objective function to obtain the wide coverage precoding matrix, and the wide coverage The power pattern generated by the precoding matrix approaches the target wide coverage power pattern, and the wide coverage precoding matrix is ​​an M×N dimensional precoding matrix, where M and N are integers greater than 0; The M-dimensional transmission signal is obtained by covering the precoding matrix, and the N-dimensional signal is generated by the access network device; the access network device sends the M-dimensional transmission signal, and the wide-coverage precoding matrix is ​​a precoding matrix for wide-angle coverage of the transmission power of the transmission signal.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a massive MIMO wide-coverage precoding transmission method and device. Background technique [0002] The large-scale multiple-input multiple-output (MIMO) technology, which can greatly improve the system capacity by installing a large-scale antenna array on the base station (BS), is one of the key technologies for the future generation of wireless networks. coming research hotspots. One of the challenging technical difficulties of massive MIMO (multiple-input multiple-output) technology is to design the signal transmission process for common channels. At present, there are relatively few researches on common channel transmission technology. Public channels play an important role in cellular systems, and many necessary public information and services are delivered to users through public channels. Because the common channel serves all users in the c...

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Problems solved by technology

[0004] However, applying this scheme to a massive MIMO system will lead to inefficient use of power amplifiers, because the 180-degree omnidirectional coverage scheme can be realized by a single antenna transmission signal, and the total transmission power of the base station is often determined by the individual power capacity of each antenna limited, so the power utilization efficiency needs to be further improved

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