Phase-locked loop circuit, setting method thereof and communication equipment

Abstract

An embodiment of the invention provides a phase-locked loop circuit, a setting method of the phase-locked loop circuit and communication equipment. The phase-locked loop circuit comprises a phase-locked loop main body circuit and a phase temperature compensation circuit, wherein the phase-locked loop circuit is capable of configuring, according to a phase shift generated by the phase-locked main body circuit as a result of a temperature change, at least one phase delay unit of the phase temperature compensation circuit to be connected to the phase-locked loop main body circuit, and cancellingout the phase shift generated by the phase-locked loop main body circuit along with the temperature change by utilizing the phase shift generated by the phase delay unit which is connected to the phase temperature compensation circuit along with the temperature change. Therefore, the phase-locked loop circuit is ensured not to generate phase shift or generate phase shift in a very small range along with the temperature change in the working process. When the phase-locked loop circuit is applied to multi-channel communication, as the phase-locked loop circuit of each channel does not generate phase shift along with the temperature change or generates phase shift within a very small range, the phase difference between the channels can be as small as possible at any moment, and the synchronization requirement is fundamentally met.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a phase-locked loop circuit, a setting method thereof, and a communication device. Background technique [0002] And with the development of communication technology, multi-array antenna base stations and multi-transceiver channel complete machines are 4G and 5G (5G th -Generation, a typical application in the 5th generation) communication technology; in 5G communication, Space Division Multiple Access (SDMA) is an important example of the application of Maximum Input Minimum Output (MassiveMIMO) technology. SDMA uses beamforming technology to concentrate signal energy in a specific direction, thereby increasing spectrum utilization efficiency and reducing interference to other receivers. Beamforming has strict requirements on the phase difference of signals between multiple channels of transceivers. For example, the phase difference between multiple channels of sub 6G 5G ...

AI Technical Summary

Problems solved by technology

Due to the limitation of cost and board area, currently one channel corresponds to one PLL circuit. Since the PLL circuit has the characteristic of phase shift with temperature changes, the phase deviation between multiple channels varies with the temperature. increase with temperature change

For this problem, in order to meet the requirement that the phase difference between multiple channels is less than the set value (for example, 5°), the current practice is that the wireless base station system adopts a series of phase detection and adjustment measures to reduce the phase error between channels. Then align the phases of multi-channel signals; for example, phase detection and alignment control are performed every 30 minutes. This phase detection alignment processing method needs to occupy a lot of system resources and generate large power consumption, and it cannot guarantee that the detection time interval The phase difference between multiple channels within the set value is less than the requirement

Therefore, how to fundamentally ensure multi-channel phase synchronization is a major technical bottleneck in base station applications

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