Key Techniques in Research and Implementation of the Direct Quadrature Conversion Transceiver

查看全文 作　　者：CAOPeng LIWeiqiang QIWei [1]FEIYuanchun 机构地区：[1]TheDepartmentofElectronics,SchoolofInformationScienceandTechnology,BeijingInstituteofTechnology,Beijing100081,China 出　　处：《Chinese Journal of Electronics》索引2004年第13卷第4期,共5页 摘　　要：This paper analyzed the key techniques of direct quadrature conversion transceiver, and designed an 800MHz-2.4GHz transmitter, using the state of art of direct quadrature up-converter. Comparing with traditional transmitters, it had made great breakthroughs in dimension, power consumption and cost. The result of the key parameters (local oscillator leakage < -38dBc, image rejection ratio < -37.2dBc) excelled the typical specifications (local oscillator leakage -34dBc, image rejection ratio36dBc). With the technology of pre-distortion, RF power amplifier had the maximum output power of 33dBm andefficiency of 40% approximately. This transmitter can be used in transmitting signals of AM, QAM, BPSK, QPSK, GSM, CDMA, WCDMA etc, and can be adapted to mobile communication equipments and miniaturized weapon systems. 关 键 词：直接正交变换 镜频抑制比 振幅平衡 相位平衡 移动通信