Abstract: The threshold value of the cell center is increased or decreased depending on the communication quality of a mobile station in the cell center. For example, if the block error rate in the communication of a mobile station in the cell center is high, the threshold value of the cell center is increased so that the mobile station in the cell center is limited to mobile stations closer to the base station.

Abstract: In a method of allocating carriers of a cellular system comprising mobile stations and a wireless network of multiple base stations, multiple carriers being available for communication between base and mobile stations, the wireless network performs the following. Carriers are divided into first and second carriers, and allocated the same for each cell formed by the base stations. Each mobile station is classified as an intracell-inner-area or an intracell-outer-area mobile station. Communication is performed with the intracell-inner-area and intracell-outer-area mobile stations by the first and second carriers, respectively. A status of use of the first carriers in a first cell is measured based on communicated data, as is that of the second carriers in a second cell. The number of second carriers in the second cell is changed based on at least the status of use of the first carriers and the status of use of the second carriers.

Abstract: A disclosed radio communications apparatus adaptively controls a modulation method and coding rate (MCS) of a data channel in accordance with received channel quality information (CQI). This apparatus includes a first data table indicating a first corresponding relationship of the MCS with respect to the CQI; a second data table indicating a second corresponding relationship of transmission power of a control channel with respect to the CQI; a first selection portion that accesses the first data table so as to select the MCS of the data channel in accordance with the received CQI; a second selection portion that accesses the second data table so as to select the transmission power of the control channel in accordance with the received CQI; and a transmission portion that transmits the data channel in accordance with the selected MCS and the control channel at the selected transmission power.

Abstract: The threshold value of the cell center is increased or decreased depending on the communication quality of a mobile station in the cell center. For example, if the block error rate in the communication of a mobile station in the cell center is high, the threshold value of the cell center is increased so that the mobile station in the cell centre is limited to mobile stations closer to the base station.

Abstract: In a method of allocating carriers of a cellular system comprising mobile stations and a wireless network of multiple base stations, multiple carriers being available for communication between base and mobile stations, the wireless network performs the following. Carriers are divided into first and second carriers, and allocated the same for each cell formed by the base stations. Each mobile station is classified as an intracell-inner-area or an intracell-outer-area mobile station. Communication is performed with the intracell-inner-area and intracell-outer-area mobile stations by the first and second carriers, respectively. A status of use of the first carriers in a first cell is measured based on communicated data, as is that of the second carriers in a second cell. The number of second carriers in the second cell is changed based on at least the status of use of the first carriers and the status of use of the second carriers.

Abstract: When channel allocation is scheduled in a dynamic TDMA frame for communications with a plurality of terminals and then the scheduling results are reflected in a frame table, a shift register is used as the frame table. The shift register comprises a plurality of register units coupled in tandem. Each of the register units is allocable to a channel for one of the plurality of terminals. A shift controller is coupled to the shift register, and controls the shift register such as to write a new channel defining data at a given register unit and collectively shift a plurality of channel defining data respectively stored in a plurality of register units so as to make space for said new channel defining data at said given shift register.

Abstract: An antenna device of transmission line type having two antenna elements opposed to each other, and a signal is fed between the two antenna elements. A variable-capacitance unit capable of changing the electrostatic capacity is provided at one or both of connection points at which opposite ends of the two antenna elements are connected to each other. Each variable-capacitance unit has a variable-capacitance diode, the electrostatic capacity of which changes according to a direct-current voltage applied between the anode and the cathode.

Abstract: A shift register includes bidirectional register units, a direction switching section, a register unit selecting section, and a shift clock supply section. The bidirectional register units are cascaded through first input/output terminals for data shifting and perform data shifting operation. The bidirectional register units have second input/output terminals which separately and directly input/output data. The direction switching section switches the shifting directions of the bidirectional register units. The register unit selecting section selects one of the bidirectional register units and inputs/outputs data through the second input/output terminal. The shift clock supply section supplies shift clocks to the bidirectional register units ranging from the bidirectional register unit selected by the register unit selecting section to the last-stage bidirectional register unit.

Abstract: An antenna device of transmission line type having two antenna elements opposed to each other, and a signal is fed between the two antenna elements. A variable-capacitance unit capable of changing the electrostatic capacity is provided at one or both of connection points at which opposite ends of the two antenna elements are connected to each other. Each variable-capacitance unit has a variable-capacitance diode, the electrostatic capacity of which changes according to a direct-current voltage applied between the anode and the cathode.

Abstract: A shift register allowing high-speed data insertion into a string of data with a relatively simple hardware-like configuration is disclosed. A plurality of register units connected in series, each of the register units having a direct input port which is selected for direct data input only when the register unit is designated.

Abstract: A shift register includes bidirectional register units, a direction switching section, a register unit selecting section, and a shift clock supply section. The bidirectional register units are cascaded through first input/output terminals for data shifting and perform data shifting operation. The bidirectional register units have second input/output terminals which separately and directly input/output data. The direction switching section switches the shifting directions of the bidirectional register units. The register unit selecting section selects one of the bidirectional register units and inputs/outputs data through the second input/output terminal. The shift clock supply section supplies shift clocks to the bidirectional register units ranging from the bidirectional register unit selected by the register unit selecting section to the last-stage bidirectional register unit.

Abstract: When channel allocation is scheduled in a dynamic TDMA frame for communications with a plurality of terminals and then the scheduling results are reflected in a frame table, a shift register is used as the frame table. The shift register comprises a plurality of register units coupled in tandem. Each of the register units is allocable to a channel for one of the plurality of terminals. A shift controller is coupled to the shift register, and controls the shift register such as to write a new channel defining data at a given register unit and collectively shift a plurality of channel defining data respectively stored in a plurality of register units so as to make space for said new channel defining data at said given shift register.

Abstract: The ultrasonic diagnostic apparatus of the present invention comprises an operation panel 11 through which different diagnostic conditions are set, a system controller 12 for controlling the frequency of the ultrasonic wave to be transmitted according to the field of view, a transmitting circuit 13 for transmitting ultrasonic wave, a receiving circuit 15 for receiving the reflected wave from an ultrasonic probe 14 to convert the reflected wave into an electric signal, an image processing unit 16 for applying the predetermined processing to the signal from the receiving circuit 15 and a display unit 17 for displaying tomographic image on the basis of the electric signal from the image processing apparatus 16.

Abstract: The ultrasonic diagnostic apparatus of the present invention comprises an operation panel 11 through which different diagnostic conditions are set, a system controller 12 for controlling the frequency of the ultrasonic wave to be transmitted according to the field of view, a transmitting circuit 13 for transmitting ultrasonic wave, a receiving circuit 15 for receiving the reflected wave from an ultrasonic probe 14 to convert the reflected wave into an electric signal, an image processing unit 16 for applying the predetermined processing to the signal from the receiving circuit 15 and a display unit 17 for displaying tomographic image on the basis of the electric signal from the image processing apparatus 16.