信号捕获和跟踪是无线通信中的关键技术。文章针对卫星扩频通信，设计了一种信号捕获及跟踪方案，包括伪噪声(PN)码捕获跟踪和载波捕获跟踪两大部分。从理论上对各模块的性能进行了分析，并利用可编程逻辑阵列(FPGA)验证了该方案的可行性和稳健性。

Signal acquisition and tracking is a key technology in wireless communications. A signal acquisition and tracking scheme has been designed for spread-spectrum satellite communications, which consists of pseudonoise code acquisition and tracking and carrier acquisition and tracking. Theoretical analysis has been made of the performances of the modules and the scheme verified by using a prototype receiver based on FPGA for its feasibility and robustness.