Abstract: A communication receiving end for receiving an inputted signal includes a signal amplifier for adjusting the inputted signal according to a first predetermined gain or a second predetermined gain to generate a first adjusted signal; an analog-to-digital converter (ADC), coupled to the signal amplifier, for converting the first adjusted signal; and a control unit, coupled to the ADC, for determining whether the ADC is saturated or not according to an output of the ADC. The first predetermined gain is associated with a first inputted signal power processed by the communication receiving end and a quantization noise of the ADC. The second predetermined gain is associated with a second inputted signal power processed by the communication receiving end and a full scale level of the ADC. The first inputted signal power is smaller than the second inputted signal power.

Abstract: The present invention discloses a network service extension method and device capable of extending the range of a network service. An embodiment of said method comprises the following steps: establishing a link between a substantial network unit of a wireless network relay device and a wireless network serving device; configuring a virtual wireless network serving unit according to the link setting of the wireless network serving device, so as to make the link settings of the virtual wireless network serving unit and the wireless network serving device the same; establishing a link between the virtual wireless network serving unit and a wireless network demand device; and establishing the connection between the wireless network serving device and the wireless network demand device via the virtual wireless network serving unit and the substantial network unit.