Unmanned aerial vehicle multi-beam forming method for base station based on optimization theory

Abstract

The invention discloses an unmanned aerial vehicle multi-beam forming method for a base station based on an optimization theory, which can balance the requirements of an unmanned aerial vehicle base station platform for the user access number and the communication quality. The method comprises the following steps: constructing a first objective function according to the difference between a detection beam expected pattern and a transmitted signal covariance matrix, and obtaining an optimized transmitted waveform covariance matrix after optimization; and constructing a second target function according to the difference between the generalized beam forming matrix and the optimized transmitted waveform covariance matrix; adding the SINR constraint item of the terminal user as a regularizationitem in a mean square sum form to the second target function according to a set weight to obtain a third target function; initializing the beam forming vector of each terminal user, solving the beamforming vector in the next iteration process according to the iteration step length in the conjugate gradient method until the beam forming vector converges to the preset convergence precision or theiteration times exceed the preset upper limit value, and obtaining the final optimized beam forming vector.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a multi-beam forming method for a base station unmanned aerial vehicle based on an optimization theory. Background technique [0002] In recent decades, with the rapid development of information technology, people's daily life has undergone revolutionary changes. Among them, wireless communication technology has played a vital role in the development of modern society and is a pioneer leading technological change. Today, through the ground base stations deployed around, terminal information is connected to the cellular network, thereby connecting sink terminals around the world, thus greatly shortening the distance between people. [0003] Today, with the increasing demand for high-speed, full-coverage communication, and the emergence of new technologies such as the Internet of Things and virtual reality, the upcoming fifth-generation wireless network is expected to fu...

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Problems solved by technology

However, the current academic and engineering circles have not considered this issue too much, and the research on the method of UAV multi-functional multi-beamforming is basically blank.

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