| 摘要: |
| 分析了基于多相滤波结构的宽带侦察接收机中频数字信号下变频处理方法。在简要说明多相滤波结构的基础上,介绍了基于多相滤波结构的数字下变频实现方法,重点分析了一种二次变频结构,该结构可以极大简化接收机设计,且具有很大的灵活性。最后通过Simulink仿真验证了该结构的合理性和正确性。 |
| 关键词: 电子侦察系统,宽带接收机,多相滤波,数字下变频,二次变频 |
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| Secondary Frequency Conversion Design for Wideband Digital Receiver Based on Polyphase Filtering |
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| Abstract: |
| This paper analyzes the digital down conversion(DDC) of wideband reconnaissance receiver IF digital signal based on polyphase filtering.After explaining the polyphase filtering structure,it introduces the implementation of DDC with emphasis on a secondary frequency conversion structure which can simplify the design of receiver and has more agility.Finally,the rationality and validity of this structure is verified through Simulink simulation. |
| Key words: electronic reconnaissance system,wideband receiver,polyphase filtering,digital down conversion,secondary frequency conversion |
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