Patent ID: 7535971

Claim:
A receiver comprising: a plurality of antennas; a switching device coupled to the antennas for selecting one of the antennas to receive transmitted signals; a demodulator coupled to the switching device for demodulating the transmitted signals to generate demodulated signals; and a control circuit coupled to the demodulator and the switching device for counting packets of a specific type within the demodulated signals so as to accordingly control the switching device, wherein the control circuit comprises: a packet detector for counting an amount of packets of the specific type appearing within the demodulated signal to generate a counting value; and a decision unit coupled to the packet detector for comparing the counting value with a threshold value and for controlling the switching device according to the comparison result, for controlling the switching device to select another antenna for receiving the transmitted signals when the counting value is greater than the threshold value, and for increasing the threshold value while controlling the switching device to select another antenna to receive the transmitted signals.