Active antenna associated equipment, system and transmitting and receiving calibration method

Abstract

The invention discloses active antenna associated equipment, a system and a transmitting and receiving calibration method. Extensible design of an antenna array is achieved, construction implementation difficulty is reduced, and meanwhile construction implementation reliability is provided. The active antenna equipment comprises N active antenna arrays, a main calibration coupling circuit unit, a transmitting and receiving calibration unit, a calibration parameter storage unit and a radio over fiber (ROF) photoelectricity conversion unit, wherein the N is larger than 1. Each active antenna array at least comprises an antenna coupling circuit unit and M antenna oscillators connected to the antenna coupling circuit unit, wherein the M is larger than 1. Antenna calibration coupling circuit units of the active antenna arrays are connected to the main calibration coupling circuit unit through a calibration channel. The main calibration coupling circuit is connected with the transmitting and receiving calibration unit. The transmitting and receiving calibration unit and the calibration parameter storage unit are respectively connected to the ROF photoelectricity 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, the jumpers usually use a certain The diameter of the RF cable, a large number of RF cables is 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 Massive MIMO communication system

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