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 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.
2. The signal transmission apparatus according to claim 1,
wherein in making signal transmission by transmitting the modulated signals as radio signals, and receiving the radio signals and inputting the radio signals to the demodulating sections, each of the unique carrier frequencies used by the respective sets of the modulating sections and the demodulating sections is set such that respective reception bands of modulated signals based on the respective carrier frequencies do not overlap.
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.
4. The signal transmission apparatus according to claim 1, 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
an intermodulation wave generated on a lower-frequency side of a lowest carrier frequency of the three adjacent carrier frequencies, the intermodulation wave being one of intermodulation waves generated on a basis of the lowest carrier frequency and an intermediate carrier frequency of the three adjacent carrier frequencies, is not present within a reception band of a modulated signal based on a carrier frequency on a lower-frequency side of the lowest carrier frequency, and
an intermodulation wave generated on a higher-frequency side of a highest carrier frequency of the three adjacent carrier frequencies, the intermodulation wave being one of intermodulation waves generated on a basis of the highest carrier frequency and the intermediate carrier frequency of the three adjacent carrier frequencies, is not present within a reception band of a modulated signal based on a carrier frequency on a higher-frequency side of the highest carrier frequency.
5. The signal transmission apparatus according to claim 1, wherein
a transmission characteristic between transmission and reception is known; and
the signal transmission apparatus includes
a signal processing section configured to perform predetermined signal processing on a basis of a setting value, and
a setting value processing section configured to input the setting value for the predetermined signal processing to the signal processing section.
6. The signal transmission apparatus according to claim 1, wherein all of the modulating sections and the demodulating sections are disposed on one circuit board.
7. The signal transmission apparatus according to claim 1, wherein
all of the modulating sections and the demodulating sections are disposed on one circuit board; and
the signal transmission apparatus includes a control section configured to change the carrier frequencies used by the respective modulating sections for transmission.
8. The signal transmission apparatus according to claim 1, wherein
all of the modulating sections and the demodulating sections are disposed on one circuit board; and
the signal transmission apparatus includes a control section configured to change the carrier frequencies used by the respective demodulating sections for reception.
9. The signal transmission apparatus according to claim 1, wherein
all of the modulating sections and the demodulating sections are disposed on one circuit board; and
the signal transmission apparatus includes a control section configured to change the carrier frequencies used by the respective modulating sections for transmission and the carrier frequencies used by the respective demodulating sections for reception.
10. The signal transmission apparatus according to claim 1, wherein
the modulating sections and the demodulating sections are scattered on a plurality of circuit boards; and
the signal transmission apparatus includes a control section configured to change the carrier frequencies used by the respective modulating sections for transmission.
11. The signal transmission apparatus according to claim 1, wherein
the modulating sections and the demodulating sections are scattered on a plurality of circuit boards; and
the signal transmission apparatus includes a control section configured to change the carrier frequencies used by the respective demodulating sections for reception.
12. The signal transmission apparatus according to claim 1, wherein
the modulating sections and the demodulating sections are scattered on a plurality of circuit boards; and
the signal transmission apparatus includes a control section configured to change the carrier frequencies used by the respective modulating sections for transmission and the carrier frequencies used by the respective demodulating sections for reception.
13. The signal transmission apparatus according to claim 9, wherein a control signal for changing the carrier frequencies is transmitted from the control section to the modulating sections or the demodulating sections by wire.
14. The signal transmission apparatus according to claim 9, wherein a control signal for changing the carrier frequencies is transmitted from the control section to the modulating sections or the demodulating sections by radio.
15. The signal transmission apparatus according to claim 14, wherein the control section is configured to set a band used by a radio signal of the control signal for changing the carrier frequencies outside a band used by a radio signal of the transmission object signal.
16. The signal transmission apparatus according to claim 14, wherein
the control section is configured to set a band used by a radio signal of the control signal for changing the carrier frequencies to a band used by a radio signal of the transmission object signal; and
the control section is configured to set each carrier frequency, including a carrier frequency of the radio signal of the control signal, such that frequency of an 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.
17. An electronic device comprising:
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.
18. The electronic device according to claim 17, 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
a first condition is satisfied, the first condition being 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, 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.
19. The electronic device according to claim 17, 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
an intermodulation wave generated on a lower-frequency side of a lowest carrier frequency of the three adjacent carrier frequencies, the intermodulation wave being one of intermodulation waves generated on a basis of the lowest carrier frequency and an intermediate carrier frequency of the three adjacent carrier frequencies, is not present within a reception band of a modulated signal based on a carrier frequency on a lower-frequency side of the lowest carrier frequency, and
an intermodulation wave generated on a higher-frequency side of a highest carrier frequency of the three adjacent carrier frequencies, the intermodulation wave being one of intermodulation waves generated on a basis of the highest carrier frequency and the intermediate carrier frequency of the three adjacent carrier frequencies, is not present within a reception band of a modulated signal based on a carrier frequency on a higher-frequency side of the highest carrier frequency.
20. A signal transmission method comprising:
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.
21. The signal transmission method according to claim 20, 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.
22. The signal transmission method according to claim 20, 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
an intermodulation wave generated on a lower-frequency side of a lowest carrier frequency of the three adjacent carrier frequencies, the intermodulation wave being one of intermodulation waves generated on a basis of the lowest carrier frequency and an intermediate carrier frequency of the three adjacent carrier frequencies, is not present within a reception band of a modulated signal based on a carrier frequency on a lower-frequency side of the lowest carrier frequency, and
an intermodulation wave generated on a higher-frequency side of a highest carrier frequency of the three adjacent carrier frequencies, the intermodulation wave being one of intermodulation waves generated on a basis of the highest carrier frequency and the intermediate carrier frequency of the three adjacent carrier frequencies, is not present within a reception band of a modulated signal based on a carrier frequency on a higher-frequency side of the highest carrier frequency.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. (canceled)
2. (canceled)
3. (canceled)
4. (canceled)
5. (canceled)
6. (canceled)
7. (canceled)
8. (canceled)
9. (canceled)
10. (canceled)
11. A computer system for issuing dynamic issue masks for processor hang prevention, the computer system comprising:
a processor configured to perform a method comprising:
storing an instruction in an issue queue for execution by an execution unit, wherein the instruction includes a default issue mask;
determining whether the instruction in the issue queue is likely to be rescinded by the execution unit;
based on determining that the instruction is not likely to be rescinded by the execution unit, issuing the instruction to the execution unit with the default issue mask;
based on determining that the instruction is likely to be rescinded by the execution unit, issuing the instruction to the execution unit with a likely to be rescinded issue mask.
12. The computer system of claim 10, wherein the likely to be rescinded issue mask is created based on the encoded issue mask.
13. The computer system of claim 10, wherein the default issue mask is created based on the encoded issue mask.
14. The computer system of claim 10, wherein the likely to be rescinded issue mask is more restrictive than the default issue mask.
15. The computer system of claim 10, wherein the likely to be rescinded issue mask blocks an issuance of any further instructions to the issue unit for a predetermined number of cycles.
16. The computer system of claim 10, wherein the determination that an instruction is likely to be rescinded is based on determining that the instruction has previously been rescinded by the execution unit.
17. The computer system of claim 10, wherein the determination of whether the instruction in the issue queue is likely to be rescinded by the execution unit includes checking a state bit in the issue queue that indicates whether the instruction is likely to be rescinded.
18. The computer system of claim 17, wherein the state bit is set based on determining that an instruction has previously been rescinded by the execution unit.
19. The computer system of claim 17, wherein the state bit is set when the instruction is dispatched based on a prediction table.
20. A computer program product for issuing dynamic issue masks for processor hang prevention, the computer program product comprising:
a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising:
computer readable program code configured for:
storing an instruction in an issue queue for execution by an execution unit, wherein the instruction includes a default issue mask;
determining whether the instruction in the issue queue is likely to be rescinded by the execution unit;
based on determining that the instruction is not likely to be rescinded by the execution unit, issuing the instruction to the execution unit with the default issue mask;
based on determining that the instruction is likely to be rescinded by the execution unit, issuing the instruction to the execution unit with a likely to be rescinded issue mask.