Patent ID: 7519345

Claim:
A receiving apparatus for receiving radio waves via first and second antennas, said receiving apparatus comprising: an obtaining unit operable to obtain a reception level of a first radio wave received via one antenna of the first and second antennas, and a transmission rate representing a transmission speed of the first radio wave, the transmission rate being included in the first radio wave and being set by a transmitting apparatus transmitting the first radio wave; a storing unit operable to store, for each of a predetermined plurality of transmission rates in which each respective transmission rate is different from each other transmission rate, a predetermined range of reception levels in which a packet error rate is substantially 0%; a determining unit operable to obtain a first range of reception levels from the storing unit which corresponds to the transmission rate of the first radio wave, to determine whether the reception level of the first radio wave is within the first range by comparing the reception level of the first radio wave to the reception levels in the first range obtained from the storing unit, and to determine whether to switch from the one antenna to another antenna based on a result of the determination as to whether the reception level of the first radio wave is within the first range; and a controlling unit operable to control switching of the antennas when the determining unit determines to switch from the one antenna to the another antenna so as to receive via the another antenna a second radio wave of a packet different from a packet of the first radio wave.