Abstract: An apparatus for connection control includes: a memory; a processor coupled to the memory and configured to execute a receiving process configured to receive, via a second wireless apparatus installed near a first wireless apparatus, identification information transmitted from a terminal that is located within a range of a first signal from the second wireless apparatus, the identification information being information configured to identify the terminal, and execute a transmitting process configured to transmit configuration information to the terminal via the second wireless apparatus when the terminal identified by the identification information is allowed to access to the first wireless apparatus that acts as a connection point for the terminal, the configuration information including a parameter for accessing the first wireless apparatus.

Abstract: There is provided a base station including a memory, a processor coupled to the memory and the processor configured to generate a distortion-compensated transmission signal, and a plurality of transmitters, a transmitter of the plurality of transmitters configured to include a first amplifier configured to amplify the distortion-compensated transmission signal so as to transmit the distortion-compensated transmission signal, and an attenuator configured to attenuate a feedback signal generated by splitting the distortion-compensated transmission signal amplified by the first amplifier so as to feed back the feedback signal to the processor, wherein the processor is further configured to perform distortion compensation according to a distortion compensation coefficient based on a power of the feedback signal.

Abstract: A radio communication circuit includes a transmitter that includes a modulator modulates a signal with a first modulation scheme and a power amplifier amplifies the signal modulated with the first modulation scheme and output the amplified signal and transmits the amplified signal, a receiver that includes a demodulator demodulates the signal output from the transmitter with a second modulation scheme that is different from the first modulation scheme, a pre-distortion compensator compensates occurred upon the amplification of the signal, of the signal input to the transmitter, based on the demodulated signal and a power controller controls supply of power to the receiver and the pre-distortion compensator and stop the supply of the power based on an average power level of the signal output from the transmitter and a peak-to-average power ratio that is a ratio of an instantaneous peak power level to the average power level.

Abstract: In a wireless communication device, in a correction value calculating mode, a control unit flips switches to the “a” sides, a modulation processing unit generates a CW signal as an I channel signal, a DAC converts the digital CW signal into an analog CW signal, an LPF eliminates the high-frequency component from the CW signal, a mixer functions as an up-converter for up-converting the CW signal, a PA amplifies the RF power of the CW signal, a mixer functions as a down-converter for down-converting the CW signal, an ADC converts the analog CW signal into a digital CW signal, a level detecting unit detects the voltage level of the CW signal, a correction value calculating unit calculates a correction value based on the detected voltage level, and a correction value storing unit stores the calculated correction value.

Abstract: A radio communication circuit includes a transmitter that includes a modulator modulates a signal with a first modulation scheme and a power amplifier amplifies the signal modulated with the first modulation scheme and output the amplified signal and transmits the amplified signal, a receiver that includes a demodulator demodulates the signal output from the transmitter with a second modulation scheme that is different from the first modulation scheme, a pre-distortion compensator compensates occurred upon the amplification of the signal, of the signal input to the transmitter, based on the demodulated signal and a power controller controls supply of power to the receiver and the pre-distortion compensator and stop the supply of the power based on an average power level of the signal output from the transmitter and a peak-to-average power ratio that is a ratio of an instantaneous peak power level to the average power level.

Abstract: In a wireless communication device, in a correction value calculating mode, a control unit flips switches to the “a” sides, a modulation processing unit generates a CW signal as an I channel signal, a DAC converts the digital CW signal into an analog CW signal, an LPF eliminates the high-frequency component from the CW signal, a mixer functions as an up-converter for up-converting the CW signal, a PA amplifies the RF power of the CW signal, a mixer functions as a down-converter for down-converting the CW signal, an ADC converts the analog CW signal into a digital CW signal, a level detecting unit detects the voltage level of the CW signal, a correction value calculating unit calculates a correction value based on the detected voltage level, and a correction value storing unit stores the calculated correction value.

Abstract: A portable mobile terminal or a transmission unit, applicable to multiplex radiocommunication systems including a CDMA, comprises a modulating section for modulating a transmission signal by using a spectrum spread system, an amplifying section for amplifying the modulated transmission signal to a needed transmission power, a plurality of variable gain units provided between the modulating section and the amplifying section to be connected in series to each other to provide an ability of changing a gain of the transmission signal modulated by the modulating section, and respectively having gain-to-phase characteristics set to cancel a phase variation of the transmission signal to the entire gain variation, and a control section for controlling a gain of each of the variable gain units. The portable mobile terminal and the transmission unit can control the transmission power in multistage throughout a wide range, and can minimize the phase variation of the transmission signal at that time.