摘  要：介绍了TD-SCDMA系统的N频点小区中，数字预失真(DPD)系统无法开启的原因。提出了在N频点小区无主载波设备的时隙0处发送测试数据，在DPD开启前用此数据进行源信号和反馈信号的延时测量，以解决DPD在无主载波时无法开启的问题。
关键词：数字预失真（DPD）；辅载波；TD-SCDMA；测试数据

Abstract: In equipment where the carriers are all non-main carriers, the DPD can’t be opened because of the non-existence of power in TS0. In order to solve this problem, a method of sending test data in TS0 was employed. By this mean, the delay of source signal and feedback signal was measured, assisting the opening of DPD in non-main-carrier N-frequency cell.
Key words: digital predistortion; non-main carrier; TD-SCDMA; test data