Abstract: In order to suppress out-of-band radiation within a range of a spectrum mask regulation without reducing transmission signal power or the like even when a wireless communication is performed in a white space by using OFDM or the like, the present invention is characterized by including an RF circuit characteristic analysis unit, a multipath delay detection unit, a digital filter setting unit, and a transmission power setting unit and further including: a windowing function/windowing duration selection unit configured to select a windowing function and a windowing duration based on the analysis result by the RF circuit characteristic analysis unit, the detection result by the multipath delay detection unit, and the setting by the digital filter setting unit and the transmission power setting unit; a guard interval duration selection unit configured to select a guard interval duration; and a transmission power selection unit configured to select transmission power.

Abstract: In order to suppress out-of-band radiation within a range of a spectrum mask regulation without reducing transmission signal power or the like even when a wireless communication is performed in a white space by using OFDM or the like, the present invention is characterized by including an RF circuit characteristic analysis unit, a multipath delay detection unit, a digital filter setting unit, and a transmission power setting unit and further including: a windowing function/windowing duration selection unit configured to select a windowing function and a windowing duration based on the analysis result by the RF circuit characteristic analysis unit, the detection result by the multipath delay detection unit, and the setting by the digital filter setting unit and the transmission power setting unit; a guard interval duration selection unit configured to select a guard interval duration; and a transmission power selection unit configured to select transmission power.

Abstract: Where two or more wireless communication networks having mutually different physical layers coexist, and wireless communication is performed between a plurality of devices and a coordinator in each one of the wireless communication networks, the coordinator of one wireless communication network generates coexistence notification frame data to notify coordinators of the other wireless communication networks of existence of the coordinator. This first coordinator encodes the generated coexistence notification frame data, inserts source data so as to be set as FEC data, modulates the FEC data through a Gaussian frequency shifting keying system (GFSK) so as to be set as a GFSK modulated wave signal, and transmits the GFSK modulated wave signal to the coordinators of the other wireless communication networks.

Abstract: Where two or more wireless communication networks having mutually different physical layers coexist, and wireless communication is performed between a plurality of devices and a coordinator in each one of the wireless communication networks, the coordinator of one wireless communication network generates coexistence notification frame data to notify coordinators of the other wireless communication networks of existence of the coordinator. This first coordinator encodes the generated coexistence notification frame data, inserts source data so as to be set as FEC data, modulates the FEC data through a Gaussian frequency shifting keying system (GFSK) so as to be set as a GFSK modulated wave signal, and transmits the GFSK modulated wave signal to the coordinators of the other wireless communication networks.

Abstract: Signal decoding apparatus, signal decoding method, program, and information record medium are provided and can accomplish not only high-speed and high-capacity communication, but high-accuracy decoding. An initial channel estimation section 31 estimates an initial channel with a pilot symbol added at the beginning of each packet. After a replica of a transmission symbol is generated, for a reception signal vector, CCI components for L transmission antennas are generated. A CCI canceller 33 removes the CCI components from the reception signal vector. After the reception symbol vector from which the CCI components had been removed has been obtained, a division device 34 obtains an instantaneous estimation value. An update condition determination section 35 detects deterioration of a channel response accuracy based on a threshold value. An instantaneous estimation value whose SNR has been determined to be insufficient is discarded.

Abstract: Signal decoding apparatus, signal decoding method, program, and information record medium are provided and can accomplish not only high-speed and high-capacity communication, but high-accuracy decoding. An initial channel estimation section 31 estimates an initial channel with a pilot symbol added at the beginning of each packet. After a replica of a transmission symbol is generated, for a reception signal vector, CCI components for L transmission antennas are generated. A CCI canceller 33 removes the CCI components from the reception signal vector. After the reception symbol vector from which the CCI components had been removed has been obtained, a division device 34 obtains an instantaneous estimation value. An update condition determination section 35 detects deterioration of a channel response accuracy based on a threshold value. An instantaneous estimation value whose SNR has been determined to be insufficient is discarded.