Abstract: A transmission apparatus for converting a transmission data series into frequency-domain, converting the frequency-domain converted signal into time-domain signal, and transmitting the time-domain converted signal, the apparatus including: a preamble pattern generation unit which outputs at least two preamble patterns among second and third preamble patterns, including bit series in which each of bits of a first preamble pattern is continued for n bits (where n is an integer equal to or greater than 2) and for k bits (where k is an integer equal to or greater than 2, and k?n), and the first preamble pattern; and a transmission unit which transmits the transmission signal including at least two of the preamble patterns output from the preamble pattern generation unit.

Abstract: A signal processing device includes: a first correlator that sequentially multiplies a first receive signal including a pattern in a receive signal and a first reference pattern signal including a complex conjugate of a first partial signal of the first receive signal at a sampling timing to generate a first correlation voltage; a second correlator that sequentially multiplies the first receive signal and a second reference pattern signal including a complex conjugate of a second partial signal, which is behind the first partial signal, at a sampling timing to generate a second correlation voltage; and a phase difference generation circuit that generates a first phase difference between the first partial signal and the second partial signal based on a first correlation peak voltage obtained when the first correlation voltage has a peak value and a second correlation peak voltage obtained when the second correlation voltage has a peak value.

Abstract: A transmission apparatus for converting a transmission data series into frequency-domain, converting the frequency-domain converted signal into time-domain signal, and transmitting the time-domain converted signal, the apparatus including: a preamble pattern generation unit which outputs at least two preamble patterns among second and third preamble patterns, including bit series in which each of bits of a first preamble pattern is continued for n bits (where n is an integer equal to or greater than 2) and for k bits (where k is an integer equal to or greater than 2, and k?n), and the first preamble pattern; and a transmission unit which transmits the transmission signal including at least two of the preamble patterns output from the preamble pattern generation unit.

Abstract: A receiving apparatus for being viewable of a first broadcast based on a first received signal received using a first frequency band as any one frequency band of a plurality of frequency bands, or being viewable of a second broadcast based on a second received signal received using a second frequency band as all frequency bands other than the first frequency band of the plurality of frequency bands, the receiving apparatus including: a receiving unit which receives a third received signal by using a third frequency band as any one frequency band of a plurality of frequency bands included in the second frequency band when the first broadcast is being viewed; and a control unit which determines whether the second broadcast is viewable or nor based on the third received signal, and switches from viewing of the first broadcast to viewing of the second broadcast.

Abstract: The wireless reception device has automatic frequency control unit for detecting, from a reception modulation signal frequency-converted to the baseband, a frequency deviation component of a carrier wave between transmission and reception sides that is contained in the reception modulation signal and removing the frequency deviation component from the reception modulation signal, the automatic frequency control unit having a frequency locking operation state and a steady state following the frequency locking operation.

Abstract: A signal processing device includes: a first correlator that sequentially multiplies a first receive signal including a pattern in a receive signal and a first reference pattern signal including a complex conjugate of a first partial signal of the first receive signal at a sampling timing to generate a first correlation voltage; a second correlator that sequentially multiplies the first receive signal and a second reference pattern signal including a complex conjugate of a second partial signal, which is behind the first partial signal, at a sampling timing to generate a second correlation voltage; and a phase difference generation circuit that generates a first phase difference between the first partial signal and the second partial signal based on a first correlation peak voltage obtained when the first correlation voltage has a peak value and a second correlation peak voltage obtained when the second correlation voltage has a peak value.

Abstract: A transmission circuit includes: a first switch configured to select one of a first baseband signal and an oscillation signal; a second switch configured to select one of a second baseband signal and the oscillation signal; a first multiplier configured to multiply a first local frequency signal based on the oscillation signal by the signal selected by the first switch; a second multiplier configured to multiply a second local frequency signal based on the oscillation signal by the signal selected by the second switch; an adder configured to add an output from the first multiplier to an output from the second multiplier; and a correction circuit configured to correct one of the first baseband signal and the second baseband signal based on an output from the adder when the first switch and the second switch select the oscillation signal.

Abstract: In the present invention, the most likely transition source state bits are selected according to the path metric of the state bits corresponding to the state bits that could be taken for the encoded bits to be input, and are stored in the survival path memory. Therefore in the trace back processing, the decoded bits can be output only by repeating the extraction of the most significant bit of the transition source state bits. As a consequence, trace back processing can be performed very simply, and decoding processing becomes possible in a short time even if a general purpose processor executes the software.

Abstract: The wireless reception device has automatic frequency control unit for detecting, from a reception modulation signal frequency-converted to the baseband, a frequency deviation component of a carrier wave between transmission and reception sides that is contained in the reception modulation signal and removing the frequency deviation component from the reception modulation signal, the automatic frequency control unit having a frequency locking operation state and a steady state following the frequency locking operation.