Omnidirectional precoding matrix generation method and device for 3D MIMO system configured with two-dimensional area array

Abstract

The invention discloses an omnidirectional precoding matrix generation method and device for a 3D MIMO system configured with the two-dimensional area array. The method simplifies design of an omnidirectional precoding matrix for a 3D large-scale MIMO system configured with the two-dimensional area array into design of a pair of complementary sequences with constant element modulus and meeting non-zero element position complementation and design of two complementary sequence sets with mutual correlation of zero, wherein all the sequences in the two sequence sets are mutually orthogonal and quadratic sum of element moduli at the same position is a constant. By simply constructing the designed complementary sequences and two complementary sequence sets, the omnidirectional precoding matrix can be obtained. The omnidirectional precoding disclosed by the invention is the same in power in each space direction in a coverage area, power of each antenna is the same, so as to improve radio frequency power utilization efficiency, and precoding matrixes on all the data flows are mutually orthogonal, so as to guarantee spectrum efficiency.

Description

technical field [0001] The present invention relates to a wireless communication method, in particular to a method and a device for generating an omnidirectional precoding matrix for a 3D massive MIMO system configured with a two-dimensional array in a ground wireless communication system and a satellite communication system. Background technique [0002] Massive MIMO can provide huge channel capacity gains and energy efficiency improvements by configuring large-scale antennas at the base station, and has become one of the key technologies for 5G mobile communications. For new technologies such as drones and the Internet of Things, massive MIMO can also provide effective support, improve the reliability and throughput of drone communications, and meet the needs of large-scale connection technologies that support the Internet of Things. At present, large-scale antenna configurations are used in satellite communication systems, and the integration of satellite mobile communica...

AI Technical Summary

Problems solved by technology

When the number of precoded data streams is two streams, the Golay complementary array extended from the Golay complementary sequence can satisfy omnidirectional constraints and antenna power constraints, but cannot satisfy semi-unitary constraints

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