Abstract: A mobile terminal includes a channel estimation processor to obtain the channel estimation value of a first channel reception signal in use of a plurality of known signals received from a base station within a channel estimation period; a channel compensation processor to perform a compensation process of the first channel reception signal in use of the channel estimation value; and a controller to control the channel estimation period so as to use a known signal which is received after the reception of the first channel reception signal for channel compensation. With this, throughput in downlink communication can be improved by controlling the deterioration of HS-SCCH reception quality itself without any particular transmission power control with the base station even under an environment such as high speed fading.

Abstract: A mobile terminal apparatus includes a channel compensation processor configured to carry out a channel compensation process on a first channel reception signal using a channel estimation value obtained for the first channel based on a plurality of known signals received from a base station; and a channel re-compensation processor to carry out a channel compensation process again on the first channel with a channel estimation value of the first channel obtained based on a plurality of known signals including at least a known signal which is received after reception of the first channel when a decoding result of the first channel reception signal after the channel compensation process by the processor is defined as an error. With this, error rate of the first channel is reduced and the number of retransmission according to HARQ is reduced, so that throughput in the mobile terminal can be improved.

Abstract: A mobile station that receives F-DCPH symbols and CPICH symbols from a base station: (1) averages a plurality of CPICH symbols in a time sequence before a certain time of interest and estimates a channel, then uses the obtained channel estimation value and the CPICH symbol at the time of interest to calculate an interference power ISCP; (2) averages a plurality of CPICH symbols in a time sequence that include the CPICH symbol at the time of interest and estimates a channel, then uses the obtained channel estimation value and the CPICH symbol at that time of interest to calculate a reference ISCP; (3) corrects an interference power ISCP at the next time of interest using the difference between the ISCP and the reference ISCP; and (4) uses the ISCP that is obtained by the correction and a reception power RSCP of the F-DCPH symbol to calculate a signal to interference power ratio SIR of the mobile station.

Abstract: There are provided a method for controlling communication of a radio terminal with a radio base station at transmission power granted by the radio base station at a request of the radio terminal to the radio base station. The radio terminal, allocates, during communication through an uplink data channel (E-DPDCH) at first transmission power granted by the radio base station, at least part of second transmission power of an uplink control channel (HS-DPCCH) to the uplink data channel (E-DPDCH) by controlling a transmission state of the uplink control channel (HS-DPCCH); and requests the radio base station to increase-the first transmission power for the uplink data channel (E-DPDCH) in accordance with the allocating.

Abstract: In a communication apparatus which transmits parameters corresponding to a reception environment to a transmitting apparatus which switches the transmission rate based on the reception environment, reception quality calculated in the past is saved as a first reception quality, and past CPICH symbols used in calculating this first reception quality are saved. Channel compensation of the saved past CPICH symbols is performed using a current channel estimation value, and the channel-compensated CPICH symbols are used to calculate a second reception quality; the difference between this second reception quality and the first reception quality is used as a reception quality correction value to correct reception quality.

Abstract: A radio terminal estimates a reception quality of an uplink signal at a radio base station based on a downlink signal received from the radio base station, and controls transmission timing to the radio base station of a transmission request for obtaining permission to transmit the uplink signal. Whereby, it is possible to control the transmission timing of the request for obtain permission to transmit the uplink signal from the radio base station, decrease a transmission electric power of the radio terminal, and obtain an expected throughput.

Abstract: A communication apparatus for transmitting a parameter (e.g. CQI) according to a receive environment to a transmission apparatus that switches a transmission rate based on the receive environment, comprising a receive environment measurement unit for measuring the receive environment, a fading environment measurement unit for measuring a fading environment in the communication apparatus, a parameter correction unit for correcting the parameter according to the receive environment based on the fading environment, and a transmission unit for transmitting the parameter to the transmission apparatus.

Abstract: A mobile terminal includes a channel estimation processor to obtain the channel estimation value of a first channel reception signal in use of a plurality of known signals received from a base station within a channel estimation period; a channel compensation processor to perform a compensation process of the first channel reception signal in use of the channel estimation value; and a controller to control the channel estimation period so as to use a known signal which is received after the reception of the first channel reception signal for channel compensation. With this, throughput in downlink communication can be improved by controlling the deterioration of HS-SCCH reception quality itself without any particular transmission power control with the base station even under an environment such as high speed fading.

Abstract: A mobile terminal apparatus includes a channel compensation processor configured to carry out a channel compensation process on a first channel reception signal using a channel estimation value obtained for the first channel based on a plurality of known signals received from a base station; and a channel re-compensation processor to carry out a channel compensation process again on the first channel with a channel estimation value of the first channel obtained based on a plurality of known signals including at least a known signal which is received after reception of the first channel when a decoding result of the first channel reception signal after the channel compensation process by the processor is defined as an error. With this, error rate of the first channel is reduced and the number of retransmission according to HARQ is reduced, so that throughput in the mobile terminal can be improved.

Abstract: A searching method and system of position information search position information through the medium of image data of an identification mark attached to construction products such as a post box, a telephone booth and a utility pole, and a tree. Image data of the identification mark on an object is acquired by using a mobile terminal device or the like and an identification code is read from this image data and notified. Position information is searched by this identification code, and this position information is notified to the mobile terminal device or the like.

Abstract: Transmissions are made controllable, taking into consideration the effects of the channels that can be transmitted on in a burst state. A communications device for transmitting adaptive modulation control parameters for communication devices that control adaptive modulation, comprises a measuring device operable to measure the reception environment and a parameter generator operable to generate the adaptive modulation control parameters based on measurement results of the reception environment and on a reception status of a predefined channel within a period of the measurement of the reception environment.