Wireless interference scanning method and device for adaptive frequency hopping

A wireless interference scanning device for adaptive frequency hopping, coupled to a wireless receiver, the wireless interference scanning device for adaptive frequency hopping comprising:

• a wide-band interference detecting circuit, coupled to an antenna and a base-band circuit of the wireless receiver, for receiving a wide-band signal by the antenna to generate a voltage value representing the overall signal magnitude over the wide-band;
• and
• a control circuit, coupled to the wide-band interference detecting circuit and the wireless receiver, determining whether the voltage value is larger than a threshold, and sequentially detecting a plurality of channels in the wide-band to determine whether there is an interference signal in the channels when the voltage value is larger than the threshold.

A wireless interference scanning device for adaptive frequency hopping, coupled to a wireless receiver, the wireless receiver having an antenna, a low-noise amplifier, a mixer, a filter, a variable gain amplifier and a base-band circuit, the wireless interference scanning device for adaptive frequency hopping comprising:

• a bypass switch, coupled to two terminals of the filter of the wireless receiver;
• and
• a control circuit, coupled to the bypass switch, the control circuit closing the bypass switch for causing a wide-band signal of a wide-band from the low-noise amplifier and the mixer be transmitted to the variable gain amplifier, the variable gain amplifier converting the wide-band signal to a voltage value, the voltage value representing the overall signal magnitude over the wide-band, the control circuit determining whether the voltage value is larger than a threshold, and sequentially detecting a plurality of channels in the wide-band to determine whether there is an interference signal in the channels when the voltage value is larger than the threshold.