BASE STATION DEVICE

摘要

Disclosed is a base station device, comprising a transmitter and a receiver. The transmitter comprises a digital uplink frequency converter, a digital-to-analog converter, a harmonic filter and a mixer. The receiver comprises a digital downlink converter, an analog-to-digital converter, an anti-aliasing filter and a mixer. The mixer of the transmitter and the mixer of the receiver share a local oscillator. The digital downlink converter is of a fixed intermediate frequency, and the digital uplink converter is of a variable intermediate frequency. The technical solution provided by the embodiments of the present invention not only supports an asymmetrical TDD system, but also achieves frequency conversion of uplink and downlink signals of different frequency points only by adopting a local oscillator circuit of ordinary performance, thereby reducing the cost and complexity of an asymmetrical TDD base station. In addition, the local oscillator solution proposed in the technical solution is applicable to both a traditional symmetrical TDD system and a traditional FDD system.