宽带数字矢量调制通道的校准与补偿  

Calibration and Compensation of Wideband Digital Vector Modulation Channel

作　　者：肖鹏[1] 王青松[2] 

机构地区：[1]中国西南电子设备研究所,四川成都610036 [2]信息综合控制国家重点实验室,四川成都610036

出　　处：《现代电子技术》2009年第7期55-57,61,共4页Modern Electronics Technique

摘　　要：在利用数字矢量调制技术实现信号模拟瞬时带宽拓展过程中,数字矢量调制上变频通道的失配会严重恶化变频通道镜频和本振抑制指标。为此,深入分析了上述通道因幅相不平衡和直流偏置等因素引起的失配。通过对通道的输出信号进行多次功率测量,实现了整个通道预失真校准补偿模型的建立和求解。仿真结果表明,建立的预失真校准补偿模型对改善调制通道的性能显著有效。In the course of broadening the signal simulation instantaneous bandwidth by using digital vector modulation technology,the frequency- conversion channel mismatch on digital vector modulation can badly worsen mirror frequency and LO suppression parameter. The mismatch caused by channel amplitude and phase imbalance and DC bias are analyzed,and the modeling and computation of channel pre - distortion calibration and compensation on whole channel are realized by repetitious power measurements of channel output signal. Simulation results demonstrate the pre - distortion calibration and compensation model is effective markedly to improve the performance of modulation channel.

关 键 词：正交通道 幅相校准 直流偏差 矢量调制 

分 类 号：TN914[电子电信—通信与信息系统]