Remote radio unit and remote ratio method

Abstract

The invention claims a remote radio unit (RRU) and a remote ratio method. The RRU comprises an uplink frequency mixer, a downlink orthogonal modulator, and a local vibration generator which is connected with the uplink frequency mixer and the downlink orthogonal modulator; the uplink frequency mixer is used for receiving an uplink simulative radio frequency signal, performing down-conversion to the uplink simulative radio frequency signal according to the local vibration frequency provided by the local vibration frequency mixer, acquiring an uplink intermediate-frequency simulative signal, and sending the intermediate-frequency simulative signal to an uplink intermediate-frequency band-pass filter; the downlink orthogonal modulator is used for receiving a downlink simulative intermediate-frequency signal, performing up-conversion to the downlink simulative intermediate-frequency signal according to the local vibration frequency provided by the local vibration generator, acquiring a downlink simulative radio frequency signal, and sending the downlink simulative radio frequency signal to a downlink adjustable gain amplifier; and the local vibration generator is used for providing two frequency ranges of local vibration frequency for the uplink frequency mixer and the downlink orthogonal modulator. When the scheme provided by the invention is adopted, the multiplexing of the local vibration generator is realized, and the cost of the RRU is reduced.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a remote radio unit (RRU, Remote Radio Unit) and a remote radio method. Background technique [0002] At present, in TD-SCDMA system and Time Division-Long Term Evolution (TD-LTE, Time Division-Long Term Evolution) system, etc., RRU and base band processing unit (BBU, Base Band Unit) are commonly used to form a distributed base station architecture. figure 1 It is a schematic diagram of an existing RRU structure. RRUs can be placed anywhere as needed, with one base station as the center, by laying out multiple RRUs to form a sub-cellular network of a single base station consisting of a baseband pool and multiple radio remote units, which can effectively solve the coverage and capacity issues. [0003] see figure 1 , the existing RRU includes at least: an uplink mixer 1105, a downlink quadrature modulator 1111, a power divider 1115, a switch 1116, a local oscillator generator 1...

AI Technical Summary

Problems solved by technology

[0029] In the existing solution, two local oscillator generators are set in the RRU, combined with a switch and a power divider, to provide local oscillator frequencies for the two frequency bands applicable to the RRU, which is costly to implement

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