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本文主要讨论了OFDM系统中使用数字中频的优点,在发射机和接收机中的实现方案,重点叙述了数字中频中两个关键模块———数控振荡器和成型滤波器在FPGA中的设计,并分析了数字量化误差。
This paper mainly discusses the advantages of using digital IF in OFDM system and its implementation in transmitter and receiver. The design of two key modules in digital IF, ie NC oscillator and shaping filter, And analyzed the digital quantization error.