SIGNAL TRANSMISSION DEVICE ADJUSTING ELECTRICAL CHARACTERISTIC VALUE CORRESPONDING TO LOGIC LEVEL AND SIGNAL TRANSMITTING METHOD THEREOF
First Claim
1. A signal transmission device comprising:
- a first modulation unit configured to generate a first modulated signal having at least three logic levels by modulating an input signal;
a characteristic adjustment unit configured to generate an adjusted first modulated signal by adjusting at least one of electrical characteristic values respectively corresponding to the at least three logic levels of the first modulated signal, based on an adjustment signal;
a second modulation unit configured to generate a second modulated signal by modulating the adjusted first modulated signal based on a carrier signal;
a power amplification unit configured to amplify power of the second modulated signal to output an amplified second modulated signal; and
an adjustment operation unit configured to generate the adjustment signal based on the electrical characteristic values respectively corresponding to the at least three logic levels of the first modulated signal and electrical characteristic values respectively corresponding to at least three logic levels of the amplified second modulated signal.
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Accused Products
Abstract
Provided is a signal transmission device including a first modulation unit generating a first modulated signal having at least three logic levels by modulating an input signal; a characteristic adjustment unit generating an adjusted first modulated signal by adjusting the at least one of electrical characteristic values based on an adjustment signal; a second modulation unit generating a second modulated signal by modulating the adjusted first modulated signal; and an adjustment operation unit generating the adjustment signal based on electrical characteristic values respectively corresponding to the at least three logic levels of the first modulated signal and corresponding to at least three logic levels of the second modulated signal. Linearity of the modulated signal generated by the provided signal transmission device is enhanced.
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Citations
15 Claims
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1. A signal transmission device comprising:
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a first modulation unit configured to generate a first modulated signal having at least three logic levels by modulating an input signal; a characteristic adjustment unit configured to generate an adjusted first modulated signal by adjusting at least one of electrical characteristic values respectively corresponding to the at least three logic levels of the first modulated signal, based on an adjustment signal; a second modulation unit configured to generate a second modulated signal by modulating the adjusted first modulated signal based on a carrier signal; a power amplification unit configured to amplify power of the second modulated signal to output an amplified second modulated signal; and an adjustment operation unit configured to generate the adjustment signal based on the electrical characteristic values respectively corresponding to the at least three logic levels of the first modulated signal and electrical characteristic values respectively corresponding to at least three logic levels of the amplified second modulated signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A signal transmitting method comprising:
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generating a first modulated signal having at least three logic levels by modulating an input signal; amplifying power of the first modulated signal to generate an amplified first modulated signal; generating an adjustment signal based on electrical characteristic values respectively corresponding to the at least three logic levels of the first modulated signal and electrical characteristic values respectively corresponding to at least three logic levels of the amplified first modulated signal; generating a second modulated signal by adjusting at least one of the electrical characteristic values respectively corresponding to the at least three logic levels of the first modulated signal, based on the adjustment signal; and amplifying power of the second modulated signal to output an amplified second modulated signal. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification