Beam searching method and device

Abstract

The embodiment of the invention provides a beam searching method and device, and the method comprises the steps: transmitting a first target signal to a terminal through a first target downlink fine beam after an optimal downlink coarse beam is determined; acquiring a second downlink fine beam reported by the terminal, wherein the second downlink fine beam is determined by the terminal by using anadaptive moment estimation algorithm according to the spectral efficiency corresponding to each target fine beam pair; if the second downlink fine beam is not the optimal downlink fine beam, transmitting the first target signal to the terminal again by using the second target downlink fine beam until the optimal downlink fine beam and the optimal uplink fine beam are determined. According to thebeam search method and device provided by the embodiment of the invention, after the optimal coarse beam pair is determined, the optimal fine beam pair is determined by adopting the adaptive moment estimation algorithm, and the beam search complexity is reduced on the premise of ensuring good system performance, so that the beam search time delay is reduced.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a beam search method and device. Background technique [0002] Due to the high millimeter-wave frequency band, the antenna size and antenna spacing are greatly reduced, and more antenna units can be integrated on the same antenna panel, making Massive Multiple-Input Multiple-Output (Massive MIMO) easier in engineering accomplish. [0003] In the prior art, in order to solve the limitation of the hardware structure, the digital-analog hybrid transmitter / receiver structure has become the focus of attention of the academic and industrial circles. Large-scale radio frequency (Radio Frequency, RF) antenna units are fully connected (each RF link is connected to all antenna units) or partially connected (fixed RF link structure, each RF link is only connected to some antenna units) Connected with a small number of RF links, the entire signal path in the transceiver ca...

AI Technical Summary

Problems solved by technology

In this scenario, since the beams for communication between the base station and the terminal will become thinner and thinner (the degree of orientation of the communication will become higher and higher), it will take longer and longer to determine the optimal communication thin beam pair. If large-scale, Existing beam search schemes are used in ultra-large-scale MIMO, and the search complexity / delay is relatively high, which cannot meet the low-latency requirements of actual systems in large-scale MIMO scenarios

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