一种用于无线通信的共时双频发射机设计与实现

In this paper, a novel concurrent dual-band transmitter architecture working in TD-SCDMA A band and TD-LTE D band is proposed. The proposed architecture is based on the concurrent dual-band technology and the traditional direct upconversion transmitter architecture, and the device selection and link budget are based on the transmitter performance requirements of the 3GPP protocol. According to the results of device selection and the outline circuit design, the transmitter PCB board design and transmitter PCB board fabrication are completed in this paper. Finally, a test platform was built to test the performance of the transmitter. The quality of the output signal was measured by the adjacent channel power ratio (ACPR) and error vector magnitude (EVM) of the output signal. The test results show that the output signal of the transmitter can be used for signal transmission of the wireless transceiver system.