Other

New Japan Radio Co., Ltd.

University of Tsukuba

Tama-tlo Corporation

Kohei Otake

Mitsuhiro Tomita

Naoki Suehiro

Noriyoshi Kuroyanagi

Satoru Ozawa

Hisao Kizaki

Yuji Maruyama

Masakazu Takahashi

Shinya Matsufuji

A de-correlating discriminating system of code division multiple access signals including a system structure composed of a plurality of cells, each of the plurality of cells including a base-station and a plurality of user-stations, each of the user-stations including a user-transmitter and a user-receiver, communicating through a multi-access channel with the base station which includes a base-station receiver and a base-station transmitter, and the user-transmitter is capable of transmitting a data symbol to convey a data with a spreading sequence and a pilot symbol that is the spreading sequence to identify a channel from the user transmitter to the base-station receiver and the base-station receiver includes a minimum means square error detector to analyze an input vector that is a received signal containing both multiple users specific data responses.

Decorrelating discrimination system of code division multiple access signals

This invention provides techniques for a CDMA system having high spectrum efficiency with low transmit power. Each transmitter comprises means of selecting some core-sequences out of multiple sequences to make them convey plural data, means of producing an enveloped selected sequence with such a method as to arrange as guard sequences to a repeated sequence made by repeating each of the selected core-sequences, means of modulating a user specific orthogonal carrier frequency by the enveloped selected sequence to produce a transmit-symbol, and means of transmitting the transmit-symbols. And a receiver comprises means of demodulating a receive-symbol with one of the user specific carrier frequencies to produce a base-band receive-symbol, means of separating respective components corresponding to the sequences selected by the user, by analyzing the base-band receive-symbol with a matrix composed of a channel response vector from the user to the receiver to detect plural data on the components.

CDMA communications system using multiple spreading sequences

A container for fixing an animal to be tested in a biochemical test comprises a tubular portion for covering a head of the animal, and a body portion for covering a body of the animal, wherein a microwave is applied to the tubular portion projected into an applicator, the container being improved in that at least a part of the tubular portion is made of a material having a high dielectric constant and a high dielectric loss. The container can make the interior of the head of the animal to be uniformly heated.

Container, for fixing an animal to be tested in a biochemical test

A microwave-heating apparatus comprising a high-power microwave oscillator which rises in its output power in a shorter time required than a time for irradiating a testing animal, a waveguide connected to the high-power microwave oscillator, a measuring member for measuring reflection coefficient connected to the waveguide and capable of being separated from the waveguide, an impedance matching part connected to the output part of the waveguide, an applicator formed by a short-circuited tapered rectangular waveguide connected to the output part of the impedance matching part, and a container for fixing a head of the animal which is inserted as a load peeping into the applicator through an insertion port provided in the wall of the applicator, whereby the measuring member for measuring reflection coefficient operates while the high-power microwave oscillator is switched off. According to the apparatus, the heads of animals can be heated under the same heating condition so as to obtain repeatable data.

Microwave-heating apparatus having means for measuring reflection

Growing community of inventors

Suginami-ku, Japan

Kohei Otake