Fujitsu Corporation

Kenichi Oide

Yoshihiro Ito

Takanori Iwamatsu

Manabu Miyamoto

Hiroshi Yano

Tadashi Nakamura

Eiji Suzuki

Satoru Abe

Yoshihiro Nozue

Takao Tomiyama

Yuichi Hagiwara

Kohji Takahashi

Yoshihiko Taki

An electronic device housing, includes: a housing case including a housing area which houses a heat generating component; a duct, including ends which are in communication with the housing area at different positions respectively and a body portion disposed outside the housing area, in which first air inside housing case which is heated by the heat generating component flows; and a flow device, disposed in the housing case, configured to circulate the first air and make second air which radiates heat in the duct flow towards a side of the housing area side.

Electronic device housing and electronic device

A method of preventing an error of a pointer process in an SDH radio device which receives an STM frame having a section overhead and a payload therein includes the steps of distributing a pointer to unused bytes or undefined bytes in the section overhead of the STM frame, the pointer indicating a start position of multiplex data in the payload of the STM frame, and transmitting the STM frame to the SDH radio device.

Method and device for avoiding error of pointer process in SDH radio communication

Herein disclosed are a radio receiving apparatus and a receiving system switching control method used in the radio receiving apparatus. The radio receiving apparatus has an active receiving system and a standby receiving system including respective equalizers, and a changeover switch for performing a switching between the active receiving system and the standby receiving system. The radio receiving apparatus further includes an alarm predicting information predicting means for detecting alarm predicting information in each of the equalizers and a switching control means for controlling a switching condition of the changeover switch on the basis of the alarm predicting information detected by the alarm predicting information detecting means, where the alarm predicting information as internal information of the equalizers is monitored to predict a malfunction of a receiving circuit to switch the circuit before the circuit is hit. It is therefore possible to reduce a hit rate of the circuit.

Receiving apparatus and method for switching between active and standby

A Viterbi decoder decodes a received signal having Ich and Qch components obtained by modulating a convolutional coded multi-valued QAM signal. The Viterbi decoder includes a first unit which inputs the received signal having the Ich and Qch components, a second unit which finds Euclidean distance between a predetermined signal point, which is one of a plurality of predetermined signal points allocated on a plane formed of Ich and Qch axes orthogonally crossed, and a signal point of the received signal, and a third unit which performs a Viterbi decoding based on the Euclidean distance obtained by the second unit.

Decoder employing viterbi decoding method for decoding coded

A radio receiver gradually changes the phase of a regenerated clock when an abnormal receiving condition is detected. Since clock phase changes gradually, an equalizer which reduces receiving distortion and a discriminator are periodically synchronized. As a result, if receiving distortion is reduced at this time, the operation of the equalizer and discriminator are normalized and the normal receiving condition can be recovered quickly.

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Fukaya, Japan

Kenichi Oide