Transmission power control apparatus, propagation path estimating apparatus, transmission power control method, and propagation path estimating method

A reception apparatus comprising:

• a reception section that receives a pilot signal and a data signal;
• a setting section that sets a first attenuation value by subtracting a reception quality value of the received pilot signal from a target reception value of the pilot signal, sets an amplification value which is set to be larger when a number of repetitions of the received data signal increases, and sets a second attenuation value by subtracting the amplification value from the first attenuation value;
• an attenuation section that attenuates power of the received pilot signal according to the second attenuation value;
• and
• a transmission channel estimation section that executes transmission channel estimation using the pilot signal with attenuated power.

A transmission power control method comprising:

• setting a first amplification value by subtracting a reception quality value reported from a receiving side from a target reception value of a pilot signal used for transmission channel estimation;
• setting an attenuation value which is set to be larger when a number of repetitions of a data signal increases;
• setting a second amplification value by subtracting the attenuation value from the first amplification value;
• and
• amplifying power of the pilot signal according to the second amplification value.

A transmission channel estimation method comprising:

• receiving a pilot signal and a data signal;
• setting a first attenuation value by subtracting a reception quality value of the received pilot signal from a target reception value of the pilot signal;
• setting an amplification value which is set to be larger when a number of repetitions of the received data signal increases;
• setting a second attenuation value by subtracting the amplification value from the first attenuation value;
• attenuating power of the received pilot signal according to the second attenuation value;
• and
• executing transmission channel estimation using the pilot signal with attenuated power.