Method and Associated Apparatus Applied to Receiver of Wireless Network for Determining Quantity of Antennas of Transmitter

An apparatus applied to a receiver of a wireless network for determining an unknown quantity of antennas of a transmitter, the receiver receiving a network signal synthesized from a plurality of single-antenna signals corresponding to the unknown quantity of antennas, each of the single-antenna signals being transmitted from a corresponding antenna among the antennas and comprising a plurality of reference messages, each of the reference messages lasting for a reference period;

• the apparatus comprising:
• a delay module, for delaying the network signal according to the reference period and an estimated shift interval to provide a delayed signal;
• a delay correlation calculation module, for calculating a correlation between the delayed signal and the network signal to generate a correlation index;
• a comparing module, for comparing the correlation index with a threshold to provide a comparison result;
• and
• a determining module, for determining the unknown quantity according to the comparison result.