Active antenna related equipment, system and method for transmitting and receiving calibration

Abstract

The invention discloses an active antenna related device, a system and a sending and receiving calibration method, which are used to realize the scalable design of the antenna array, reduce the difficulty of engineering implementation and provide engineering implementation reliability. The active antenna device includes: N active antenna arrays, a main calibration coupling circuit unit, a transceiver calibration unit, a calibration parameter storage unit, and an optical radio communication ROF photoelectric conversion unit, wherein the N is greater than 1; the active antenna array At least including an antenna coupling circuit unit and M antenna elements connected to the antenna coupling circuit unit, where M is greater than 1; the antenna calibration coupling circuit unit of the active antenna array is connected to the main calibration coupling circuit through a calibration channel unit, the main calibration coupling circuit is connected to the transceiver calibration unit, and the transceiver calibration unit and the calibration parameter storage unit are respectively connected to the ROF photoelectric conversion unit.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an active antenna-related device, system and transceiver calibration method. Background technique [0002] At present, in the third-generation mobile communication (3G) network, a communication system architecture composed of a baseband processing unit (BBU) and a remote radio unit (RRU) is adopted. Among them, the BBU and the RRU are connected by optical fiber, and one BBU can support multiple RRUs. [0003] Such as figure 1 Shown is a schematic diagram of the communication system composed of BBU+RRU, where the BBU is connected to the optical interface of the RRU through an optical fiber, the optical interface in the RRU is connected to the digital intermediate frequency, and the digital intermediate frequency is respectively connected to the transceiver array and the transceiver calibration unit. Wherein, the transceiver array is connected to the PA / LNA, and the PA / LNA...

AI Technical Summary

Problems solved by technology

[0004] In a Massive MIMO communication system, the number of antenna channels N is greater than or equal to 64, that is, the number of jumpers on the radio frequency is greater than 64. In order to reduce the transmission loss between the antenna and the RRU, usually the jumpers with a certain diameter are used. RF cables, a large number of RF cables are quite difficult in engineering implementation, and it is difficult to provide reliability guarantee

[0005] Therefore, the existing communication system solution combining BBU, RRU and passive antenna is not feasible in the MassiveMIMO communication system

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