CAJ | 학술논문

根据某侦察接收机的需要，基于软件无线电设计思想，分析了影响解调性能的主要因素以及解决方法，提出了一种偏移正交相移键控（OQPSK）解调器的全数字实现结构。介绍了数字下变频滤波抽取、符号同步和载波同步等模块的详细设计与实现。解调器结构简单，具有高度的稳定性、灵活性和可扩展空间，可以应用于通信、侦察接收机中。
근거모정찰접수궤적수요，기우연건무선전설계사상，분석료영향해조성능적주요인소이급해결방법，제출료일충편이정교상이건공（OQPSK）해조기적전수자실현결구。개소료수자하변빈려파추취、부호동보화재파동보등모괴적상세설계여실현。해조기결구간단，구유고도적은정성、령활성화가확전공간，가이응용우통신、정찰접수궤중。
In this paper, the main factors that affect the demodulator performance are analyzed. A design of all digital OQPSK demodulator based on software defined radio is presented. The demodulator includes digital down converter, carrier recovery and timing recovery, etc. The demodulator achieves high performance by using a joint architecture of timing and carrier synchronization. The system has good extensibility and flexibility and it can be applied to demodulation for communication or receiver