Abstract: By compensating for a detection result of the detector in feedback control of output power of the power amplifier, the polar modulation transmission apparatus is able to realize accurate transmission power control. Polar modulation transmission apparatus 100 has detector 106 that detects output power of power amplifier 103, PAPR calculating section 131 that calculates the PAPR of the spread modulated signal, compensation value generating section 134 that outputs a compensation value corresponding to the calculated PAPR and an arithmetic operator that performs an arithmetic operation using the compensation value and a detection result obtained by detector 106. By this means, it is possible to compensate for the sensitivity of detector 106 (measurement sensitivity) that changes depending on the ?parameter and mode and make the sensitivity of detector 106 (measurement sensitivity) virtually constant.

Abstract: An object of the invention is to provide a polar modulation transmitter that can perform adaptive distortion compensation processing without the need for a synchronization adjustment circuit for synchronizing an input baseband signal and an output signal of a power amplifier.

Abstract: Even when there is limit placed upon transmission power control time, the transmission power control method enables accurate control transmission power. The transmission power control method includes: a first measuring step of measuring, in a symbol interval before a symbol interval where mode of the power amplifier changes, output power of the power amplifier before mode changes; a first setting step of setting target power of the power amplifier after mode changes based on a measurement result obtained in the first measuring step and a transmission power control signal; a second measuring step of measuring, in the symbol interval where mode of the power amplifier changes, output power of the power amplifier after mode changes, the output power being controlled using the target power set in the first setting step; and a second step of setting corrected target power based on a measurement result obtained in the second measuring step.

Abstract: As explained above, according to embodiments of the present invention, by providing averaging section 111 that detects an average power value of amplitude component signals, and controlling transmission power based on the amount of drift in the average output power value of PA 103 and the amount of drift in the average power value of amplitude component signals, when residual drift components are included in the average output power value of PA 103, the influence of residual drift components can be eliminated and transmission power can be controlled, so that it is possible to improve the accuracy of transmission power control. That is, deterioration of power estimation accuracy resulting from residual drift components can be reduced, so that it is possible to satisfy the restrictive requirement that the difference between transmission power be within, for example, the range of +/?0.5 dB.

Abstract: Management terminal apparatus, wireless terminal apparatus, and a wireless communication method that reduces interference and improves communication quality under a communication environment where a plurality of wireless communication schemes are mixed. At management terminal apparatus (200), a wireless section (210) receives communication profile information from wireless terminal apparatus (100) and outputs this to communication permission generating section (220). The communication profile information may include information for a used wireless communication scheme, used frequency bandwidth, communication start time and communication continuation time, for wireless resources shared by a plurality of wireless communication schemes within the wireless communication system. Furthermore, wireless section (210) transmits communication permit/deny information to wireless terminal apparatus (100).

Abstract: Based on a received signal of a wireless communication system currently used for communication, a communication quality in a case of switching to another wireless communication system for communication is efficiently and precisely estimated. A communication quality estimating part (201) subjects both a known signal received, by use of a first wireless communication system, from a radio part (200) and a reference signal outputted from a reference signal storage part (203) to a conversion processing unique to a second wireless communication system for comparison, thereby artificially estimating the communication quality in a case of using a second wireless communication system for communication under the same wireless transmission path environment.

Abstract: An object of the invention is to provide a multimode polar modulation device and a multimode radio communication method for making it possible to decrease the distortion compensation processing data capacity while maintaining the distortion compensation accuracy and also making it possible to efficiently store the distortion compensation processing data corresponding to a multimode modulation signal adaptively acquired in memory. At the distortion compensation coefficient calibration operation time of a polar modulation circuit 1901, a control section 1903 selects a modulation signal with a narrower dynamic range of amplitude signal than at the transmission operation time, an adaptive operation control section 1711 measures a spectrum in output of a power amplifier 1 for each predetermined output level, and a distortion compensation processing circuit 1701 finds optimum coefficient information.

Abstract: An object of the invention is to provide a polar modulation transmitter that can perform adaptive distortion compensation processing without the need for a synchronization adjustment circuit for synchronizing an input baseband signal and an output signal of a power amplifier.

Abstract: By compensating for a detection result of the detector in feedback control of output power of the power amplifier, the polar modulation transmission apparatus is able to realize accurate transmission power control. Polar modulation transmission apparatus 100 has detector 106 that detects output power of power amplifier 103, PAPR calculating section 131 that calculates the PAPR of the spread modulated signal, compensation value generating section 134 that outputs a compensation value corresponding to the calculated PAPR and an arithmetic operator that performs an arithmetic operation using the compensation value and a detection result obtained by detector 106. By this means, it is possible to compensate for the sensitivity of detector 106 (measurement sensitivity) that changes depending on the P parameter and mode and make the sensitivity of detector 106 (measurement sensitivity) virtually constant.

Abstract: By compensating for a detection result of the detector in feedback control of output power of the power amplifier, the polar modulation transmission apparatus is able to realize accurate transmission power control. Polar modulation transmission apparatus 100 has detector 106 that detects output power of power amplifier 103, PAPR calculating section 131 that calculates the PAPR of the spread modulated signal, compensation value generating section 134 that outputs a compensation value corresponding to the calculated PAPR and an arithmetic operator that performs an arithmetic operation using the compensation value and a detection result obtained by detector 106. By this means, it is possible to compensate for the sensitivity of detector 106 (measurement sensitivity) that changes depending on the B parameter and mode and make the sensitivity of detector 106 (measurement sensitivity) virtually constant.

Abstract: Even when there is limit placed upon transmission power control time, the transmission power control method enables accurate control transmission power. The transmission power control method includes: a first measuring step of measuring, in a symbol interval before a symbol interval where mode of the power amplifier changes, output power of the power amplifier before mode changes; a first setting step of setting target power of the power amplifier after mode changes based on a measurement result obtained in the first measuring step and a transmission power control signal; a second measuring step of measuring, in the symbol interval where mode of the power amplifier changes, output power of the power amplifier after mode changes, the output power being controlled using the target power set in the first setting step; and a second step of setting corrected target power based on a measurement result obtained in the second measuring step.

Abstract: Provided is a digital filter for radio communication processing capable of dynamically modifying the characteristic and simultaneously processing a plurality of systems. In the digital filter, calculation core groups (1010-1017) capable of modifying function are arranged and connected to one another by an input interface unit (102) and an output interface unit (103). When the communication mode is modified, the number of calculation resources to be used and its setting contents are decided according to the setting candidate of the filter characteristic required and the calculation resource empty state.

Abstract: A multimode wireless communication apparatus that supports plural wireless communication systems and switches wireless communication systems to communicate. The apparatus includes a signal processor capable of switching wireless communication systems by plural manners; and a controller that directs to the signal processor a combination of manners of switching wireless communication systems according to a communication environment. The signal processor switches wireless communication systems according to the combination of manners of switching wireless communication systems directed from the controller.

Abstract: A wireless communication apparatus and a communication control method wherein even if there occurs a change in communication control information due to a function change, an appropriate correction is implemented to improve the communication quality. A wireless communication apparatus (100) comprises a plurality of reconfigurable function parts (reconfigurable function modules (1031)) that reconfigure functions related to communication to perform digital signal processings according to a plurality of communication formats; and a communication operation control function part that controls the communication operation. Each of the reconfigurable function parts includes a property register (10311) in which the communication control information is written.

Abstract: Management terminal apparatus, wireless terminal apparatus, and a wireless communication method that reduces interference and improves communication quality under a communication environment where a plurality of wireless communication schemes are mixed. At management terminal apparatus (200), a wireless section (210) receives communication profile information from wireless terminal apparatus (100) and outputs this to communication permission generating section (220). The communication profile information may include information for a used wireless communication scheme, used frequency bandwidth, communication start time and communication continuation time, for wireless resources shared by a plurality of wireless communication schemes within the wireless communication system. Furthermore, wireless section (210) transmits communication permit/deny information to wireless terminal apparatus (100).

Abstract: As explained above, according to embodiments of the present invention, by providing averaging section 111 that detects an average power value of amplitude component signals, and controlling transmission power based on the amount of drift in the average output power value of PA 103 and the amount of drift in the average power value of amplitude component signals, when residual drift components are included in the average output power value of PA 103, the influence of residual drift components can be eliminated and transmission power can be controlled, so that it is possible to improve the accuracy of transmission power control. That is, deterioration of power estimation accuracy resulting from residual drift components can be reduced, so that it is possible to satisfy the restrictive requirement that the difference between transmission power be within, for example, the range of +/?0.5 dB.

Abstract: The transmission apparatus and transmission power controlling method are able to keep high speed feedback control and control transmission power accurately. Polar modulation transmitter (100) is provided with LPF (108) that performs waveform shaping of output power of PA (103) and ADC (109) that obtains output power data for each mode by sampling filtered signals in compressed mode and filtered signals in uncompressed mode at the same phase as the filtered signals in compressed mode. In this way, the phases of sampling signals before and after the mode change are the same, so that it is possible to obtain sampling signals of the same condition before and after the mode change, from filtered signal waveforms. According to feedback control based on these sampling signals, even if drift components remain in the filtered signals, the influence can be ignored, so that it is possible to keep high speed feedback control, and estimate and control transmission power accurately.

Abstract: Based on a received signal of a wireless communication system currently used for communication, a communication quality in a case of switching to another wireless communication system for communication is efficiently and precisely estimated. A communication quality estimating part (201) subjects both a known signal received, by use of a first wireless communication system, from a radio part (200) and a reference signal outputted from a reference signal storage part (203) to a conversion processing unique to a second wireless communication system for comparison, thereby artificially estimating the communication quality in a case of using a second wireless communication system for communication under the same wireless transmission path environment.