Fujitsu Corporation

Michiko Satou

Kenji Suzuki

Tadashi Saitou

Toshikazu Tsuchiya

A transmission apparatus of a receiving side to receive a signal transmitted from a transmission apparatus of a transmitting side, the transmission apparatus of the receiving side includes: a first monitor configured to measure an eye pattern indicating a signal waveform transition of the signal transmitted from the transmission apparatus of the transmitting side; a pattern analyzer configured to extract a first feature of the eye pattern measured by the first monitor; and a regulation controller configured to cause the transmission apparatus of the transmitting side to adjust at least one of rising and falling of a signal to be transmitted, based on the first feature extracted by the pattern analyzer.

Transmission apparatus

A communication device that compensates a distortion of a transmission signal, amplifies the compensated transmission signal by an amplifier, and outputs the signal. The device includes a storage unit that stores a transmission characteristic of a transmission power of the communication device, a correcting unit that calculates a power value at a set transmission frequency by referring to the storage unit and that corrects a feedback signal of the transmission signal amplifier by the amplifier based on the calculated power value and a maximum transmission power defined by the communication device, and a calculating unit that calculates a distortion compensation coefficient based on the transmission signal and the feedback signal corrected.

Communication device and power correction method

A wireless communication apparatus configured to amplify a transmission signal at an amplifier and transmit the amplified transmission signal, the wireless communication apparatus includes a memory configured to store a distortion compensation coefficient for compensating a distortion characteristic of the amplifier, and an electrical-power measuring unit configured to measure electrical power of the transmission signal. The wireless communication apparatus includes a gain control unit configured to calculate a gain adjustment value for correcting the distortion compensation coefficient stored in the memory based on a power value measured by the electrical-power measuring unit, and a distortion-compensation processing unit configured to perform distortion compensation on the transmission signal based on the distortion compensation coefficient stored in the memory and the gain adjustment value.

Growing community of inventors

Kawasaki, Japan

Michiko Satou