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能否有效地抑制上行信道的噪声，是ＨＦＣ（光纤同轴电缆混合网）能否正常传输数据信息的关键问题。本文分析了上行信道的噪声来源，探讨了抑制噪声的有效方法
The key issue of whether HFC (Fiber Coax Hybrid Network) can transmit data information normally can effectively suppress the noise of the uplink channel. This paper analyzes the sources of noise in the uplink channel and discusses the effective method of noise suppression