Patent ID: 7418242

Claim:
A transmission apparatus comprising: a gain control signal generating section that generates a gain control signal comprising a signal for adjusting a gain for a received signal of a communicating party; a gain control signal multiplex section that time division multiplexes a directional transmission signal and the gain control signal so that the gain control signal is transmitted a predetermined time before a frame in which the directional transmission signal is transmitted in bursts; a transmission level control section that sets a transmission power level of the gain control signal so that a transmission power level of the gain control signal is smaller than a transmission power level of the directional transmission signal and a received power level of the gain control signal is larger than a received power level at a communicating party of a nondirectional transmission signal; and a transmission section that transmits the directional transmission signal and the gain control signal at the transmission power level set at said transmission level control section with directivity, and transmits the nondirectional transmission signal without directivity.