Matsushita Electric Industrial Co., Ltd.

Ntt Docomo, Inc.

Hideki Yukitomo

Katsuhiko Hiramatsu

Akira Kinno

Takehiro Nakayama

Atsushi Takeshita

Minako Ide

Sadaki Futagi

Takashi Suzuki

Kazuyuki Miya

Mitsuru Uesugi

Hiroshi Fujimoto

Keiji Takakusaki

Keiji Takausaki

A data compressor including a separating unit configured to separate input data into cross reference data with the reference information between the vertices, and a vertex group including the plurality of vertices with the types and values, and to output data of the vertex group thus separated; a template storing unit configured to store reference information between vertices having a specific pattern, as a template; a template match detecting unit configured to detect a portion matching the template stored in the template storing unit, from the cross reference data separated by the separating unit; and a template replacing unit configured to replace the matched portion detected by the template match detecting unit with the template, in a state in which the reference information between the vertices can be referred to, and to output the replaced cross reference data.

Data compressor, data decompressor, and data management system

A communications terminal apparatus, a reception apparatus, and a method can enhance the effect of reducing the amount of information to be transmitted when text data is generated and transmitted. The communications terminal apparatusstores key identifier definition information in a key identifier definition-storage area. The communications terminal apparatusobtains a key identifier corresponding to an operated key from the key identifier definition-storage areawhen the key is operated, and adds and stores it as a key identifier string in the input key identifier storage area. The communications terminal apparatustransmits the key identifier string stored in the input key identifier storage areaby the transmission functionwhen a transmit instruction is detected.

Communications terminal apparatus, reception apparatus, and method therefor

A document transformation system comprises: template storing means for storing structure information having a specific pattern, as a template; template match detecting means for importing the structure information forming the structured document, and transformation location information indicating a transformation location of the structure information, and for detecting a match portion between the structure information and the template, excepting the transformation location indicated by the transformation location information, from objects of detection, in the structure information; template replacing means for importing the structure information forming the structured document, and match information indicating the match portion, for replacing the match portion indicated by the match information, in the structure information with the template, and for outputting replaced structure information; and transforming means for importing the character string information forming the structured document, the replaced structure information, and a transformation rule for transformation of the structure information and character string information forming the structured document, for transforming the replaced structure information and the character string information thus imported, according to the transformation rule, and for outputting transformed structure information and transformed character string information.

Document transformation system

A diversity receiver estimates a reception weight sing signals received at a plurality of antennas, a target pattern former forms a target radiation pattern based on the estimated reception weight, a transmission pattern former forms a transmission radiation pattern with a transmission weight using an arbitrary transmission weight as an initial value, a controller limits an angle range in which formation of the target radiation pattern and formation of the transmission radiation pattern are executed, an error detector detects an error between the target radiation pattern and the transmission radiation pattern, and subjects the detected error to logarithmic transformation, an updator updates the transmission weight so as to reduce the error subjected to logarithmic transformation, and a directivity former provides a transmission signal with a directivity according to the transmission radiation pattern formed using an updated transmission weight.

Adaptive directivity transmission device and method

When carrying out directive reception using an adaptive array antenna apparatus, a plurality of diversity reception circuits which differ in communication environment follow-up performance are used for reception and the reception output with the best reception quality is selected. The environment follow-up performance of the other non-selected diversity reception circuits is dynamically changed, preferably every time a selection is made by a selector based on the environment follow-up performance of a selected diversity reception circuit.

Method of directional reception using array antenna, and adaptive array antenna unit

An adaptive transmission diversity apparatus utilizes a spread spectrum system, detects radiation patterns of direct and indirect waves, which have arrived in a time-shifted manner, by reception radiation pattern controllers. A transmission radiation pattern controller is utilized in accordance with a transmission radiation pattern. The transmission radiation pattern is determined by selecting a pattern from reception radiation patterns obtained by the reception radiation pattern controllers. This can ensure a higher transmission performance.

Adaptive transmission diversity apparatus and adaptive transmission diversity method

By estimating the movement direction of a communication partner, the radiation pattern is forcibly rotated to thereby form a correct radiation pattern. Specifically, an apparatus of the present invention includes reception radiation pattern control section for providing a reception signal from an antenna with a first reception radiation pattern by a first control signal, radiation pattern control section for providing the abovementioned reception signal with a second reception radiation pattern by a second control signal based on an output of movement direction estimating section for estimating a movement direction of a transmitting side, and a reception signal processing system having multiplication section for multiplying the abovementioned reception signal by the first control signal and the second control signal. Consequently, even when the movement speed of the transmitting side or the receiving side is high, by causing a reception radiation pattern controller or a transmission radiation pattern controller to respond to the movement to thereby form a correct radiation pattern, the transmission and reception performance can be improved.

Adaptive reception diversity method and adaptive transmission diversity method

Received signal provided via plural antennas,are memorized in memory,. First weight controller,calculates the first weights by which the received signals are weighted, and second weight controller,calculates the second weights using the received signals. Multipliers,and,multiply the memorized received signals by the first weights, while multiply the memorized received signals by the second weights when a channel quality of radio signals deteriorates due to a change of the radio signal's direction of arrival Adder,synthesizes the multiplication results. Propagation path distortion compensator,estimates a deterioration of the channel quality using synthesis result to compensate. Detector,detects the compensation result that is used as a parameter to calculate the first and second weights, which allows the apparatus to receive radio signals without deteriorating reception qualities when the channel quality deteriorates rapidly due to the change of the radio signal's direction of arrival.

Data communication apparatus and data communication method

Adaptive reception diversity apparatus and adaptive transmission

A CMA-based antenna system is disclosed which shows an improved receiving performance by reducing phase differences in the received signals which have been weighted. The CMA-based antenna system comprises a plurality of antenna, weight circuits, an adder, an error detector and a synthesis controller. The synthesis controller controls the weight circuits so as not only to make the adder output at a preset level but also to cause any differences among the weight circuit outputs not to increase. In order to cope with an error of symbol synchronization and a delayed wave, the CMA-based antenna system may further have a kind of equalizer inserted before the weight circuit in each antenna circuit.

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Yokohama, Japan

Hideki Yukitomo