| 摘要 |
According to the invention, a transmission quality is not deteriorated and, when a system is applied to a variable bit transmission, a high-precision transmission electric power control can be executed. An Eb/Io calculating circuit calculates and Eb/Io value of a signal electric energy per bit Eb and an interface electric power per Hz Io from a reception base-banding signal from a radio receiving unit for every bit rate. A maximum value detecting unit detects a maximum value from the Eb/Io values. The maximum Eb/Io value is compared with a target Eb/Io value by a comparing unit and a transmission electric power control bit for allowing the transmission electric power to be decreased when the maximum Eb/Io value is larger than the target Eb/Io value and, in the case contrary to the above, for allowing the transmission electric power to be increased. The transmission electric power control bit is sent to a multiplexing unit. The bit and transmission data are multiplexed. The multiplexed data is modulated, its frequency is converted, and the resultant data is transmitted at an electric power based on the TPC bit by a radio transmitting unit. |
