Sony Ericsson Mobile Communications Japan, Inc.

Sony Corporation

Noboru Oki

Katsutoshi Itoh

Taku Nagase

Masahiko Naito

Osamu Yoshimura

Shigenori Uchida

Takashi Izumi

Hiroaki Nagaoka

A wireless communication apparatus having a wireless communication function capable of using a plurality of transmission rates. The wireless communication apparatus includes utilization-factor calculation section for calculating a utilization factor of a wireless transmission path through which wireless communication is performed using the wireless communication function and determination section for determining a transmission rate at least on the basis of the utilization factor calculated by the utilization-factor calculation section.

Wireless communication apparatus, method and program storage medium

The mobile communication terminal of the present invention comprises an amplitude regulatorregulating the amplitudes of signals of the DPDCH, DPCCH, and HS-DPCCH, a transmission-power controllercontrolling the power-distribution ratio for the adjustment of transmission power of the individual transmission channels, and a priority-channel selectorchoosing a priority channel from among the individual transmission channels. If the total transmission power of the individual transmission channels is going to exceed the maximum transmission power, the transmission-power controllerdetermines the power-distribution ratio among the individual transmission channels by adjusting the transmission power of the priority transmission channel to a power level demanded by a base station on the one hand and adjusting the transmission power of the non-priority channel so as to confine the total transmission power to the maximum transmission power on the other hand. Accordingly, the base station can receive information correctly even if the transmission power demanded by the base station is beyond the maximum transmission power of the mobile communication terminal.

Mobile communication terminal and method of controlling transmission power

Disclosed is a method and an apparatus for controlling transmission electric power capable of minimizing a decrease in the amount of maximum transmission electric power without degrading an adjacent channel leakage power ratio when code-multiplexing additional control information with data and main control information. A mobile device checks values of gain factors &#x3b2;d and &#x3b2;c when performing code multiplexing to transmit signals from channels DPDCH to transmit data, DPCCH to transmit main control information, and HS-DPCCH to transmit additional control information. A maximum transmission electric power is decreased at a plurality of levels based on the check result and a ratio (&#x394;hs) between the gain factors &#x3b2;c and &#x3b2;hs. It may be preferable to check the presence or absence of transmission data instead of the gain factor &#x3b2;d. In this case, when no transmission data is available, the maximum transmission electric power is decreased at a plurality of levels based on &#x394;hs. When transmission data is available, the maximum transmission electric power is decreased at a plurality of levels based on the gain factor &#x3b2;c and &#x394;hs.

Transmission power control method and device

Control information, which is transmitted through a circuit different from the one used for the transmission of a plurality of pieces of information to be multiplexed, is analyzed. When the analysis results in a determined intra-TTI data length of information having longer Transmission Time Interval, it is determined whether a range of values that TFCI may take is limited or not. If the determination provides a positive result, the intra-TTI data length of information having a longest Transmission Time Interval which has been determined by the latest TFCI decoding is used as a base for limiting TFCI candidates to be decoded next, so as to decode the TFCI.

Method of multiplexing information in mobile communications, method and apparatus for decoding transport format combination indicator, and mobile station apparatus, base station apparatus and mobile communication system

A signal processing device and method are provided. The signal processing device and method perform maximum-likelihood decoding of data transmitted at an arbitrary data rate among a plurality of predetermined data rates after error detection coding and error correction coding.

Signal processing device and signal processing method

Provides a normalizing apparatus that normalizes input signals to a turbo decoder without significantly increasing a size of a circuit. An input signal buffer () obtains a sum S for N pieces of input signal data I(i). An input data averaging part () obtains an average A by dividing the sum S by the number of data N. A divider () obtains normalized data I(i)/A by dividing the input signals I(i) by the average A. A weighting part () multiplies the normalized data I(i)/A with a weighting coefficient &#x3b1;, which is determined based on a ratio of a number of input data and a number of output data in rate matching. As a result, the normalization is made possible. Because a signal receiving quality does not need to be determined, an increase in circuit size is inhibited.

Normalizing device and method, program, recording medium on which the program is recorded and communication terminal for normalizing data

A data reception device is provided with: a puncture rate detection element to detect the puncture rate of received data, an interpolation element to interpolate bits decimated at the detected puncture rate, a deinterleaving element to restore interleaved data to the original arrangement, and a turbo-decoding element, while variably setting the length of the learning interval according to the puncture rate detected by the puncture rate detection element, to input sliding window data and the data of the above learning interval following the data of the sliding window to the data processed by the interpolation element and deinterleaving element, and to perform recursive operations to decode the data of the sliding window. The valid received signal contained in the learning interval can be maintained approximately constant even if the puncture rate changes.

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Saitama, Japan

Noboru Oki