Large-scale MIMO precoding transmission method and device

Abstract

The embodiment of the invention discloses a large-scale MIMO precoding transmission method, which is used for realizing wide-angle coverage of transmitting power of transmitting signals in a large-scale MIMO system and can improve the utilization efficiency of power. The method provided by the embodiment of the invention comprises the following steps: access network equipment determines a target function according to a preset target wide coverage power pattern; the access network equipment processes the precoding matrix corresponding to the target function by using a steepest descent method toobtain a wide coverage precoding matrix, a power pattern generated by the wide coverage precoding matrix approaches to a target wide coverage power pattern, the wide coverage precoding matrix is an M* N-dimensional precoding matrix, and M and N are integers greater than 0; the access network device multiplies the N-dimensional signal by the wide coverage precoding matrix to obtain an M-dimensional transmitting signal, and the N-dimensional signal is generated by the access network device; and the access network device sends the M-dimensional transmission signal, wherein the wide-coverage precoding matrix is a precoding matrix covered by the transmission power of the transmission signal at a wide angle.

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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