Communication system and apparatus using chip signals
First Claim
1. A communication method comprising:
- an inputting step of inputting a signal;
a pulse position modulating step comprising adding a predetermined analog pattern signal to the inputted signal and pulse position modulating the inputted signal to which the predetermined analog pattern signal has been added, said pulse position modulating step including modulating the inputted signal such that a position of a generated pulse signal is different according to the inputted signal;
a converting step of converting a modulated signal which was modulated by said pulse position modulating step into a chirp signal; and
an outputting step of outputting the chirp signal onto a transmission path.
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Abstract
There are provided a communication system and an apparatus for modulating a communication signal into a chirp signal and executing the communication. In the system, a signal to be transmitted is input, a predetermined analog pattern signal is added to the input signal and is pulse position modulated, the modulated signal is converted into the chirp signal, and the chirp signal is output onto a transmission path. The converted chirp signal can be also converted into an optical signal and the optical signal can be also output onto the transmission path. After the analog or digital input signal was pulse position modulated, by converting the modulated signal into the chirp signal, the analog signal can be also transmitted and received as a chirp signal. Thus, the communication reliability can be assured without being influenced by disturbance noises or irrespective of a limitation of a transmission electric power of the transmission path.
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Citations
19 Claims
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1. A communication method comprising:
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an inputting step of inputting a signal; a pulse position modulating step comprising adding a predetermined analog pattern signal to the inputted signal and pulse position modulating the inputted signal to which the predetermined analog pattern signal has been added, said pulse position modulating step including modulating the inputted signal such that a position of a generated pulse signal is different according to the inputted signal; a converting step of converting a modulated signal which was modulated by said pulse position modulating step into a chirp signal; and an outputting step of outputting the chirp signal onto a transmission path. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A communication method for executing a predetermined modulating process on an input signal, transmitting and receiving the modulated signal, and executing a predetermined demodulating process on the received modulated signal, comprising:
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on a transmission side, a step of modulating the input signal by a pulse position modulating system and a step of transmitting a chirp signal obtained by expanding frequency components of the modulated signal in the direction of a time base, the pulse position modulating system modulating the input signal being such that a position of a generated pulse signal is different according to the input signal; and on a reception side, a step of compressing frequency components of the received chirp signal by compressing characteristics opposite to expanding characteristics and a step of reproducing an original signal by executing a pulse position demodulation after the compressing step. - View Dependent Claims (8, 9, 10, 11)
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12. A communication apparatus comprising:
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inputting means for inputting a signal to be transmitted; pulse position modulating means for adding a predetermined analog pattern signal to the inputted signal and pulse position modulating the inputted signal to which the predetermined analog pattern signal has been added, said pulse position modulating means modulating the inputted signal such that a position of a generated pulse signal is different according to the inputted signal; converting means for converting the modulated signal which was modulated by said pulse position modulating means into a chirp signal; and outputting means for outputting the chirp signal onto a transmission path. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A communication apparatus comprising:
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inputting means for inputting a signal to be transmitted; pulse position modulating means for pulse-position modulating the inputted signal such that a position of a generated pulse signal is different according to the inputted signal; balance modulating means for balance modulating the signal which was pulse-position modulated by said pulse position modulating means; converting means for converting the modulated signal which was modulated by said balance modulating means into a chirp signal; and outputting means for outputting the chirp signal onto a transmission path.
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Specification