为了满足直接序列扩频体制下航天器测控应答机的需求,对伪码跟踪环进行了研究.提出了一种新的全数字伪码跟踪环:采用新的超前滞后鉴别器,再生伪码相位精确可控的伪码发生器,环路自适应调整相关间距和环路带宽,解决了伪码跟踪环的入锁时间、收敛范围与跟踪精度之间的矛盾,并采用分时复用的方式实现鉴别、滤波等计算功能.仿真和实测结果均验证了研究的有效性,已成功应用于某航天工程. In order to meet the demand of spacecraft TT & C transponder in direct sequence spread spectrum system, a pseudo-code tracking loop is studied. A new all-digital pseudo-code tracking loop is proposed, which uses a new lead-lag discriminator, Precisely controllable pseudo-code generator, loop adaptive adjustment of the relevant spacing and loop bandwidth, to solve the pseudo-code tracking loop locking time, the convergence range and the tracking accuracy of the conflict, and the use of time-sharing mode Realize the calculation function of identification, filtering, etc. The validity of the research has been verified by the simulation and the measured results and has been successfully applied to a space project.