Abstract: A reception apparatus including an extraction section; a transmission line characteristic estimation section; an interpolation section; a compensation section; a detection section; and a selection section.

Abstract: An OFDM receiver includes: a variable gain amplifier controlling a signal level of an intermediate frequency signal that is obtained from a reception signal by frequency-conversion; and an automatic gain controller controlling a gain of the variable gain amplifier means. The automatic gain controller includes: a clip detector comparing a clip number threshold value with a detected number of transient clips in which a signal level of the intermediate frequency signal exceeds a parameter clip level, so as to detect a period where the detected number exceeds the clip number threshold value; an accumulator accumulating a detection output of the clip detector; and a target value decision circuit to which an accumulation output of the accumulator is supplied.

Abstract: Disclosed herein is a signal processing apparatus, including: a computation device operable to perform transform computation adapted to Fourier-transform a time domain OFDM i.e., Orthogonal Frequency Division Multiplexing signal into a frequency domain OFDM signal; a processing device operable to perform carrier frequency offset detection adapted to detect an estimated carrier frequency offset that is an error of a carrier used for demodulation of the OFDM signal; and a carrier frequency offset correction device operable to perform carrier frequency offset correction adapted to correct the carrier frequency offset of the frequency domain OFDM signal in accordance with the estimated carrier frequency offset.

Abstract: Disclosed herein is a reception apparatus including: an acquisition section configured to acquire an orthogonal frequency division multiplexing signal composed resultingly of signals transmitted by the orthogonal frequency division multiplexing method from a plurality of transmission apparatuses; a correction value calculation block configured to calculate a correction value for correcting a drift amount of the orthogonal frequency division multiplexing signal using the phase of either a first pilot signal or a second pilot signal extracted from the acquired orthogonal frequency division multiplexing signal, the first pilot signal being obtained from pilot signals which are in phase with one another coming from the plurality of transmission apparatuses, the second pilot signal being acquired from pilot signals which are out of phase with one another coming from the plurality of transmission apparatuses; and a correction block configured to correct the drift amount of the orthogonal frequency division multiple

Abstract: A reception apparatus including an extraction section; a transmission line characteristic estimation section; an interpolation section; a compensation section; a detection section; and a selection section.

Abstract: A reception apparatus includes: an extraction section; a transmission line characteristic estimation section; an estimation section; a frequency shift amount production section; a control section; an addition section; a first frequency shifting section; a second frequency shifting section; an interpolation section; a compensation section; a detection section; and an operation section.

Abstract: An OFDM receiver includes: a variable gain amplifier controlling a signal level of an intermediate frequency signal that is obtained from a reception signal by frequency-conversion; and an automatic gain controller controlling a gain of the variable gain amplifier means. The automatic gain controller includes: a clip detector comparing a clip number threshold value with a detected number of transient clips in which a signal level of the intermediate frequency signal exceeds a parameter clip level, so as to detect a period where the detected number exceeds the clip number threshold value; an accumulator accumulating a detection output of the clip detector; and a target value decision circuit to which an accumulation output of the accumulator is supplied.

Abstract: The universal platform for the SDR of the present invention employs the direct conversion approach with the n-port MMIC followed by reconfigurable reprogrammable devices such as DSP's or FPGA's. The universal platform is based on the linear operation of the devices. Thus, the DC offset problem may be solved. It is also possible to support very wide bandwidths compared with conventional I/Q receivers. Therefore, the present universal platform is suitable for multimode and multiband communications.