Fujitsu Corporation

Tomohiro Nakamura

Takeshi Ohba

Yasuhito Funyu

Hiroaki Abe

Takanori Iwamatsu

Toshiaki Suzuki

Fumihiko Kobayashi

Toshiyuki Ito

Yoshiyasu Tsuruoka

Isamu Umino

Junichi Hasegawa

Junya Hiramatsu

Yasuomi Iriyama

Atsushi Yoshida

Hirokazu Sato

Tomonori Ota

Yuta Inoue

Yasumasa Oshiro

Teruhiko Kitazawa

Mitsunori Hanaka

Hitoshi Tominaga

Yasunori Noritake

A distortion compensation apparatus includes: a filtering unit that is provided with a plurality of storing units each of which is capable of storing a signal therein and that filters an input signal by sequentially moving the input signal starting from a storing unit provided on a first stage up to another storing unit provided on a final stage; a calculating unit that calculates a power level of a signal output from a storing unit that is provided on an earlier stage than the storing unit provided on the final stage; an output unit that, on the basis of the power level calculated, outputs a distortion compensation coefficient used for cancelling out non-linear distortion occurring in an amplifier; and a distortion compensation unit that performs a distortion compensation process on a signal output from the storing unit provided on the final stage, by using the distortion compensation coefficient.

Distortion compensation apparatus and distortion compensation method

A storage unit stores information indicting the past execution records of a plurality of related tasks. An operating unit obtains information indicating the execution status of a plurality of tasks. After obtaining the information, the operating unit obtains the execution status of an unexecuted task included in the plurality of related tasks, which was not yet executed, at an estimated time by which the unexecuted task is completed and which is estimated based on the information stored in the storage unit.

Information acquisition method and information acquisition apparatus

A monitoring apparatus includes a processor that executes a procedure, the procedure including outputting an alert when observation data satisfies a certain condition, the observation data being obtained at a certain time interval, suppressing the outputting of the alert in accordance with control, and performing control the suppressing until the certain time elapses since one of the outputting of the alert and the suppressing is performed.

Monitoring apparatus, monitoring method and recording medium of monitoring program

A computer-readable medium recorded with a deadlock pre-detection program for making a computer execute a first procedure of making the computer read job logic design information structured of a plurality of process steps including an access step involving an access to any one of a plurality of databases, a second procedure of generating a process route configured of at least two access steps on the basis of the job logic design information, a third procedure of acquiring the first access step and the second access step from the process route, a fourth procedure of judging whether a data base access sequence based respectively on the first step and the second step is a predetermined access sequence or not, and a fifth procedure of notifying of, in the case of judging that the access sequence is not the predetermined access sequence, a purport of deviating from the predetermined access sequence.

Computer-readable medium recorded with a deadlock pre-detection program

A distortion compensator updating and selecting a distortion compensation coefficient applied to a digital transmission signal so as to reduce the difference between the digital transmission signal and a digital feedback signal is disclosed. The distortion compensator includes a control part that controls the level of an input signal to an analog-to-digital conversion part outputting the digital feedback signal in accordance with the magnitude of the amplitude of the digital transmission signal.

Distortion compensator

A power correction value generating unit determines a power correction value for minimizing an error, from a reference output power value of a carrier multiplexed signal, generating due to peak power suppression under a carrier setting based on the carrier setting relating to either one or both of the number of carrier signals and frequency arrangement, and peak suppression setting. An output power error correcting unit corrects a signal gain before or after the carrier signals are multiplexed, using the power correction value obtained by the power correction value generating unit. In an apparatus performing peak suppression according to an input limitation power of the power amplifier, it is possible to always obtain a desirable transmission (output) power even when the number of carriers or carrier frequency arrangement varies.

Output power error absorbing circuit and multi-carrier transmitter having the same

A radio relay apparatus complying with SDH is provided which permits the value of B2 bytes received from a transmitting-side terminal station to be sent to a receiving-side terminal station even in the case where resetting of a pointer value is performed. B2 sampling means of the radio relay apparatus samples B2 byte information, and B2 recomputing means again performs B2 parity computation of received transmission information which has been subjected to the pointer value resetting. Adding means adds bit by bit the data sampled by the B2 sampling means to the data obtained by the B2 recomputing means, and transmitting means transmits the sum obtained by the adding means to a subsequent radio relay apparatus. Based on the sum transmitted from the transmitting means, the subsequent radio relay apparatus judges that data which is a subject of B2 parity computation and which corresponds to a bit having the value '1' is erroneous.

Radio relay apparatus

Feed forward amplifier

Growing community of inventors

Kawasaki, Japan

Tomohiro Nakamura