Interrogator
First Claim
1. An interrogator which performs radio communication with a responder by a frequency hopping scheme, comprising:
- hopping pattern setting means for setting, as a frequency hopping pattern code, elements of a matrix in which all integers of “
1”
to “
the number of frequencies to be used”
appear only once and for obtaining the frequency hopping pattern code by adding, as an offset, any one of integers of “
0”
to “
(the number of frequencies to be used)−
1”
to each of elements of a matrix obtained by excluding integers larger than the number of frequencies to be used from a matrix in which all integers of “
1”
to “
(prime number larger than the number of frequencies to be used)−
1”
or “
1”
to “
(positive integer power of a prime number larger than the number of frequencies to be used)−
1”
appear only once at pseudo random;
frequency oscillation means for converting the frequency hopping pattern code set by the hopping pattern setting means into the frequencies to be used to output unmodulated signals of the frequencies;
transmission means for modulating the unmodulated signal output by the frequency oscillation means by transmission data to output a modulated signal to an antenna; and
reception means for demodulating a modulated signal from the responder received by the antenna by the unmodulated signal output by the frequency oscillation means.
1 Assignment
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Accused Products
Abstract
A hopping pattern setting section sets, as a frequency hopping pattern code, elements of a matrix in which all integers of “1” to “the number of frequencies to be used” appear only once and which is obtained by adding, as an offset, any one of integers of “0” to “(the number of frequencies to be used)−1” to each of elements of a matrix obtained by excluding integers larger than the number of frequencies to be used from a matrix in which all integers of “1” to “(prime number larger than the number of frequencies to be used)−1” appear only once. A frequency oscillation section converts the frequency hopping pattern code into the frequencies to be used to output unmodulated signals of the frequencies to a transmission section and a reception section.
7 Citations
38 Claims
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1. An interrogator which performs radio communication with a responder by a frequency hopping scheme, comprising:
-
hopping pattern setting means for setting, as a frequency hopping pattern code, elements of a matrix in which all integers of “
1”
to “
the number of frequencies to be used”
appear only once and for obtaining the frequency hopping pattern code by adding, as an offset, any one of integers of “
0”
to “
(the number of frequencies to be used)−
1”
to each of elements of a matrix obtained by excluding integers larger than the number of frequencies to be used from a matrix in which all integers of “
1”
to “
(prime number larger than the number of frequencies to be used)−
1”
or “
1”
to “
(positive integer power of a prime number larger than the number of frequencies to be used)−
1”
appear only once at pseudo random;frequency oscillation means for converting the frequency hopping pattern code set by the hopping pattern setting means into the frequencies to be used to output unmodulated signals of the frequencies; transmission means for modulating the unmodulated signal output by the frequency oscillation means by transmission data to output a modulated signal to an antenna; and reception means for demodulating a modulated signal from the responder received by the antenna by the unmodulated signal output by the frequency oscillation means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An interrogator which performs radio communication with a responder by a frequency hopping scheme, comprising:
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a sender which is configured to modulate an unmodulated signal by transmission data to output a modulated signal to an antenna; a receiver which is configured to demodulate a modulated signal from the responder received by the antenna by the unmodulated signal; a hopping pattern setting section having a hopping pattern table which is configured to set, as a frequency hopping pattern code, elements of a matrix in which all integers of “
1”
to “
the number of frequencies to be used”
appear only once and which is obtained by adding, as an offset, any one of integers of “
0”
to “
(the number of frequencies to be used)−
1”
to each of elements of a matrix obtained by excluding integers larger than the number of frequencies to be used from a matrix in which all integers of “
1”
to “
(prime number larger than the number of frequencies to be used)−
1”
or “
1”
to “
(positive integer power of a prime number larger than the number of frequencies to be used)−
1”
appear only once at pseudo random; anda frequency oscillator which is configured to convert the frequency hopping pattern code set by the hopping pattern setting section into the frequencies to be used to output unmodulated signals of the frequencies to the sender and the receiver. - View Dependent Claims (19, 20)
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21. A method of performing radio communication with a responder by a frequency hopping scheme, comprising:
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storing, as a frequency hopping pattern code, to a memory elements of a matrix in which all integers of “
1”
to “
the number of frequencies to be used”
appear only once;obtaining the frequency hopping pattern code stored in the memory by adding, as an offset, any one of integers of “
0”
to “
(the number of frequencies to be used)−
1”
to each of elements of a matrix obtained by excluding integers larger than the number of frequencies to be used from a matrix in which all integers of “
1”
to “
(prime number larger than the number of frequencies to be used)−
1”
or “
1”
to “
(positive integer power of a prime number larger than the number of frequencies to be used)−
1”
appear only once at pseudo random;converting the frequency hopping pattern code into the frequencies to be used to output unmodulated signals of the frequencies; modulating the unmodulated signal by transmission data to output a modulated signal to an antenna; and demodulating a modulated signal from the responder received by the antenna by the unmodulated signal.
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22. An interrogator which performs radio communication with a responder by a frequency hopping scheme, comprising:
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hopping pattern setting section which sets, as a frequency hopping pattern code, elements of a matrix in which all integers of “
1”
to “
the number of frequencies to be used”
appear only once and obtains the frequency hopping pattern code by adding, as an offset, any one of integers of “
0”
to “
(the number of frequencies to be used)−
1”
to each of elements of a matrix obtained by excluding integers larger than the number of frequencies to be used from a matrix in which all integers of “
1”
to “
(prime number larger than the number of frequencies to be used)−
1”
or “
1”
to “
(positive integer power of a prime number larger than the number of frequencies to be used)−
1”
appear only once at pseudo random;frequency oscillator which converts the frequency hopping pattern code set by the hopping pattern setting section into the frequencies to be used to output unmodulated signals of the frequencies; transmitter which modulates the unmodulated signal output by the frequency oscillator by transmission data to output a modulated signal to an antenna; and receiver which demodulates a modulated signal from the responder received by the antenna by the unmodulated signal output by the frequency oscillator. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification