Signal transmission apparatus, electronic device, and signal transmission method
First Claim
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1. A signal transmission apparatus comprising:
- a plurality of modulating sections respectively configured to modulate a transmission object signal into a modulated signal; and
a plurality of demodulating sections configured to demodulate the modulated signals,wherein respective sets of the modulating sections and the demodulating sections are configured to utilize a unique carrier frequency, wherein a frequency of a third-order intermodulation distortion component generated on a basis of two adjacent carrier frequencies is not present within any of reception bands of modulated signals based on each of the other carrier frequencieswherein three adjacent carrier frequencies satisfy the following conditions;
where a first frequency difference is defined as a difference between a lowest carrier frequency and an intermediate carrier frequency of the three adjacent carrier frequencies, a second frequency difference is defined as a difference between a highest carrier frequency and the intermediate carrier frequency of the three adjacent carrier frequencies, and a small frequency difference is defined as the smaller of the first frequency difference and the second frequency difference,a first condition that a sum of a reception bandwidth on a higher-frequency side of the lower component frequency of the small frequency difference and a reception bandwidth on a lower-frequency side of the higher component frequency of the small frequency difference is smaller than the small frequency difference;
a second condition that, where the first frequency difference is the small frequency difference, the difference between the second frequency difference and the first frequency difference is larger than the greater of a reception bandwidth on the lower-frequency side of the lowest carrier frequency and a reception bandwidth on the lower-frequency side of the highest carrier frequency; and
a third condition that, where the second frequency difference is the small frequency difference, the difference between the first frequency difference and the second frequency difference is larger than the greater of a reception bandwidth on a higher-frequency side of the lowest carrier frequency and a reception bandwidth on a higher-frequency side of the highest carrier frequency.
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Abstract
A signal transmission apparatus including: a plurality of modulating sections configured to modulate a transmission object signal; and a plurality of demodulating sections configured to demodulate the modulated signals modulated by the modulating sections, wherein each of carrier frequencies as frequencies different from each other used by respective sets of the modulating sections and the demodulating sections is set such that frequency of a third-order intermodulation distortion component generated on a basis of two carrier frequencies adjacent to each other is not present within any of reception bands of modulated signals based on each of the other carrier frequencies.
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Citations
22 Claims
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1. A signal transmission apparatus comprising:
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a plurality of modulating sections respectively configured to modulate a transmission object signal into a modulated signal; and a plurality of demodulating sections configured to demodulate the modulated signals, wherein respective sets of the modulating sections and the demodulating sections are configured to utilize a unique carrier frequency, wherein a frequency of a third-order intermodulation distortion component generated on a basis of two adjacent carrier frequencies is not present within any of reception bands of modulated signals based on each of the other carrier frequencies wherein three adjacent carrier frequencies satisfy the following conditions; where a first frequency difference is defined as a difference between a lowest carrier frequency and an intermediate carrier frequency of the three adjacent carrier frequencies, a second frequency difference is defined as a difference between a highest carrier frequency and the intermediate carrier frequency of the three adjacent carrier frequencies, and a small frequency difference is defined as the smaller of the first frequency difference and the second frequency difference, a first condition that a sum of a reception bandwidth on a higher-frequency side of the lower component frequency of the small frequency difference and a reception bandwidth on a lower-frequency side of the higher component frequency of the small frequency difference is smaller than the small frequency difference; a second condition that, where the first frequency difference is the small frequency difference, the difference between the second frequency difference and the first frequency difference is larger than the greater of a reception bandwidth on the lower-frequency side of the lowest carrier frequency and a reception bandwidth on the lower-frequency side of the highest carrier frequency; and a third condition that, where the second frequency difference is the small frequency difference, the difference between the first frequency difference and the second frequency difference is larger than the greater of a reception bandwidth on a higher-frequency side of the lowest carrier frequency and a reception bandwidth on a higher-frequency side of the highest carrier frequency. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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3. The signal transmission apparatus according to claim al, wherein
four or more carrier frequencies are used; - and
each carrier frequency of each combination of three adjacent carrier frequencies of the four or more carrier frequencies is set such that the first condition is satisfied, and the second condition is satisfied when the first frequency difference is smaller than the second frequency difference and the third condition is satisfied when the first frequency difference is larger than the second frequency difference.
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17. An electronic device comprising:
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a first electronic device including a plurality of sections of first modulating sections respectively configured to modulate a transmission object signal into a modulated signal and a plurality of first demodulating sections configured to demodulate the modulated signals, the plurality of sections being disposed within one casing of the first electronic device; a second electronic device including a second demodulating section corresponding to each first modulating section and a second modulating section corresponding to each first demodulating section, the second demodulating section and the second modulating section each being disposed within one casing of the second electronic device; and a radio signal transmission line configured to allow the modulated signals to be transmitted as radio signals, the radio signal transmission line being formed when the first electronic device and the second electronic device are disposed at determined positions, wherein respective sets of the modulating sections and the demodulating sections are configured to utilize a unique carrier frequency, wherein a frequency of a third-order intermodulation distortion component generated on a basis of two adjacent carrier frequencies is not present within any of reception bands of modulated signals based on each of the other carrier frequencies wherein three adjacent carrier frequencies satisfy the following conditions; where a first frequency difference is defined as a difference between a lowest carrier frequency and an intermediate carrier frequency of the three adjacent carrier frequencies, a second frequency difference is defined as a difference between a highest carrier frequency and the intermediate carrier frequency of the three adjacent carrier frequencies, and a small frequency difference is defined as the smaller of the first frequency difference and the second frequency difference, a second condition that, where the first frequency difference is the small frequency difference, the difference between the second frequency difference and the first frequency difference is larger than the greater of a reception bandwidth on the lower-frequency side of the lowest carrier frequency and a reception bandwidth on the lower-frequency side of the highest carrier frequency; and a third condition that, where the second frequency difference is the small frequency difference, the difference between the first frequency difference and the second frequency difference is larger than the greater of a reception bandwidth on a higher-frequency side of the lowest carrier frequency and a reception bandwidth on a higher-frequency side of the highest carrier frequency. - View Dependent Claims (18, 19)
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20. A signal transmission method comprising:
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arranging a plurality of modulating sections respectively configured to modulate a transmission object signal into a modulated signal, and a plurality of demodulating sections configured to demodulate the modulated signals; and setting a plurality of unique carrier frequencies used by respective sets of the modulating sections and the demodulating sections such that a frequency of a third-order intermodulation distortion component generated on a basis of two adjacent carrier frequencies is not present within any of reception bands of modulated signals based on each of the other carrier frequencies wherein three adjacent carrier frequencies satisfy the following conditions; where a first frequency difference is defined as a difference between a lowest carrier frequency and an intermediate carrier frequency of the three adjacent carrier frequencies, a second frequency difference is defined as a difference between a highest carrier frequency and the intermediate carrier frequency of the three adjacent carrier frequencies, and a small frequency difference is defined as the smaller of the first frequency difference and the second frequency difference, a first condition that a sum of a reception bandwidth on a higher-frequency side of the lower component frequency of the small frequency difference and a reception bandwidth on a lower-frequency side of the higher component frequency of the small frequency difference is smaller than the small frequency difference; a second condition that, where the first frequency difference is the small frequency difference, the difference between the second frequency difference and the first frequency difference is larger than the greater of a reception bandwidth on the lower-frequency side of the lowest carrier frequency and a reception bandwidth on the lower-frequency side of the highest carrier frequency; and a third condition that, where the second frequency difference is the small frequency difference, the difference between the first frequency difference and the second frequency difference is larger than the greater of a reception bandwidth on a higher-frequency side of the lowest carrier frequency and a reception bandwidth on a higher-frequency side of the highest carrier frequency. - View Dependent Claims (21, 22)
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Specification