CAJ | 학술논문

基于直接序列（DSSS）扩频通信原理，阐述了直接序列扩频接收机的组成和工作原理，对解扩解调部分进行了详细设计，给出了关键模块的原理和实现方法；尤其对扩频信号的自动增益控制、伪码捕获、伪码跟踪、载波跟踪以及定时同步等电路进行了细致论述，并说明了注意事项；最后，给出了硬件实现方式和测试数据。设计采用低成本的现场可编程门阵列（FPGA）和数字信号处理器（DSP）实现，具有灵活性强、速度快等特点，而且通过工程应用证明了设计是正确可行的。
기우직접서렬（DSSS）확빈통신원리，천술료직접서렬확빈접수궤적조성화공작원리，대해확해조부분진행료상세설계，급출료관건모괴적원리화실현방법；우기대확빈신호적자동증익공제、위마포획、위마근종、재파근종이급정시동보등전로진행료세치논술，병설명료주의사항；최후，급출료경건실현방식화측시수거。설계채용저성본적현장가편정문진렬（FPGA）화수자신호처리기（DSP）실현，구유령활성강、속도쾌등특점，이차통과공정응용증명료설계시정학가행적。
Based on DSSS （Direct Sequence-Spread Spectrum） principle, the composition and working principles of DSSS receiver is studied. The parts of de-spread spectrum and de-modulation are discussed in details, and the principles and method of the key modules are put forward. Especially the automatic gain control, PN code acquisition, PN code tracking, carrier tracking, timing synchronization circuits and so on are discussed in detail and some adviees are presented. Finally, the method of hardware implementation and test data are given. The design is realized based on low-cost FPGA and DSP, with the characters of high agility, high speed and so on. The design is practiced and correct.