一种新的双模应答机全数字中频接收机设计

Design of the IF all digital receiver for a novel dual-mode transponder

讨论了一种新的USB和TDRSS系统兼容型双模应答机中频数字接收机的工作原理和处理算法,并对该系统的实现进行了可行性分析。在此基础上,提出了一种简单实用的模式控制策略。最后采用FPGA+DSP方案实现了该系统。由于采用中频全数字化,使得本系统通用性强、灵活性高,可以实现硬件资源共享。测试结果完全满足指标要求,验证了算法的有效性和正确性。

The operating principle and processing algorithm of IF compatible receiver for a novel dual-mode transponder with USB and TDRSS system is discussed, and the legibility of the system realization is also analyzed. On this basis, a simple but practical mode control strategy is proposed and the hardware design with FPGA ＋ DSP is adopted to realize the system. This design strategy makes the system both universal and flexible, and furthermore, the hardware resources can be shared in different modes. The testing results meet the requirements perfectly, which shows the effectiveness and correcmess of the presented algorithms.