Direct RF modulation transmitter, sampling clock frequency setting method for direct RF modulation transmitter

Shuichi Fukuda (Inventor), Bram Nauta (Inventor)

Research output: PatentProfessional

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Abstract

PROBLEM TO BE SOLVED: To provide a direct RF modulation transmitter capable of satisfying a radiation level regulation even without providing a SAW filter. SOLUTION: A direct RF modulation transmitter includes: digital/RF converters 105, 106 to which an I digital baseband signal, a Q digital baseband signal, and a differential local signal are inputted, for modulating the differential local signal with the I digital baseband signal and the Q digital baseband signal; a PLL circuit 102 for generating a sampling clock signal fs which determines data rates of the I digital baseband signal and the Q digital baseband signal at the digital/RF converters 105, 106; and a sampling clock frequency setting circuit 101 for determining the frequency of the sampling clock signal fs generated by the PLL circuit 102, according to an intended transmission carrier frequency. ;COPYRIGHT: (C)2013,JPO&INPITPROBLEM TO BE SOLVED: To provide a direct RF modulation transmitter capable of satisfying a radiation level regulation even without providing a SAW filter.SOLUTION: A direct RF modulation transmitter includes: digital/RF converters 105, 106 to which an I digital baseband signal, a Q digital baseband signal, and a differential local signal are inputted, for modulating the differential local signal with the I digital baseband signal and the Q digital baseband signal; a PLL circuit 102 for generating a sampling clock signal fs which determines data rates of the I digital baseband signal and the Q digital baseband signal at the digital/RF converters 105, 106; and a sampling clock frequency setting circuit 101 for determining the frequency of the sampling clock signal fs generated by the PLL circuit 102, according to an intended transmission carrier frequency.
Original languageEnglish
Patent numberJP2013038461 (A)
Publication statusPublished - 21 Feb 2013

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Clocks
Transmitters
Modulation
Phase locked loops
Sampling
Networks (circuits)
Carrier communication
Radiation

Keywords

  • EWI-27358
  • IR-101895

Cite this

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abstract = "PROBLEM TO BE SOLVED: To provide a direct RF modulation transmitter capable of satisfying a radiation level regulation even without providing a SAW filter. SOLUTION: A direct RF modulation transmitter includes: digital/RF converters 105, 106 to which an I digital baseband signal, a Q digital baseband signal, and a differential local signal are inputted, for modulating the differential local signal with the I digital baseband signal and the Q digital baseband signal; a PLL circuit 102 for generating a sampling clock signal fs which determines data rates of the I digital baseband signal and the Q digital baseband signal at the digital/RF converters 105, 106; and a sampling clock frequency setting circuit 101 for determining the frequency of the sampling clock signal fs generated by the PLL circuit 102, according to an intended transmission carrier frequency. ;COPYRIGHT: (C)2013,JPO&INPITPROBLEM TO BE SOLVED: To provide a direct RF modulation transmitter capable of satisfying a radiation level regulation even without providing a SAW filter.SOLUTION: A direct RF modulation transmitter includes: digital/RF converters 105, 106 to which an I digital baseband signal, a Q digital baseband signal, and a differential local signal are inputted, for modulating the differential local signal with the I digital baseband signal and the Q digital baseband signal; a PLL circuit 102 for generating a sampling clock signal fs which determines data rates of the I digital baseband signal and the Q digital baseband signal at the digital/RF converters 105, 106; and a sampling clock frequency setting circuit 101 for determining the frequency of the sampling clock signal fs generated by the PLL circuit 102, according to an intended transmission carrier frequency.",
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Direct RF modulation transmitter, sampling clock frequency setting method for direct RF modulation transmitter. / Fukuda, Shuichi (Inventor); Nauta, Bram (Inventor).

Patent No.: JP2013038461 (A).

Research output: PatentProfessional

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T1 - Direct RF modulation transmitter, sampling clock frequency setting method for direct RF modulation transmitter

AU - Fukuda, Shuichi

AU - Nauta, Bram

PY - 2013/2/21

Y1 - 2013/2/21

N2 - PROBLEM TO BE SOLVED: To provide a direct RF modulation transmitter capable of satisfying a radiation level regulation even without providing a SAW filter. SOLUTION: A direct RF modulation transmitter includes: digital/RF converters 105, 106 to which an I digital baseband signal, a Q digital baseband signal, and a differential local signal are inputted, for modulating the differential local signal with the I digital baseband signal and the Q digital baseband signal; a PLL circuit 102 for generating a sampling clock signal fs which determines data rates of the I digital baseband signal and the Q digital baseband signal at the digital/RF converters 105, 106; and a sampling clock frequency setting circuit 101 for determining the frequency of the sampling clock signal fs generated by the PLL circuit 102, according to an intended transmission carrier frequency. ;COPYRIGHT: (C)2013,JPO&INPITPROBLEM TO BE SOLVED: To provide a direct RF modulation transmitter capable of satisfying a radiation level regulation even without providing a SAW filter.SOLUTION: A direct RF modulation transmitter includes: digital/RF converters 105, 106 to which an I digital baseband signal, a Q digital baseband signal, and a differential local signal are inputted, for modulating the differential local signal with the I digital baseband signal and the Q digital baseband signal; a PLL circuit 102 for generating a sampling clock signal fs which determines data rates of the I digital baseband signal and the Q digital baseband signal at the digital/RF converters 105, 106; and a sampling clock frequency setting circuit 101 for determining the frequency of the sampling clock signal fs generated by the PLL circuit 102, according to an intended transmission carrier frequency.

AB - PROBLEM TO BE SOLVED: To provide a direct RF modulation transmitter capable of satisfying a radiation level regulation even without providing a SAW filter. SOLUTION: A direct RF modulation transmitter includes: digital/RF converters 105, 106 to which an I digital baseband signal, a Q digital baseband signal, and a differential local signal are inputted, for modulating the differential local signal with the I digital baseband signal and the Q digital baseband signal; a PLL circuit 102 for generating a sampling clock signal fs which determines data rates of the I digital baseband signal and the Q digital baseband signal at the digital/RF converters 105, 106; and a sampling clock frequency setting circuit 101 for determining the frequency of the sampling clock signal fs generated by the PLL circuit 102, according to an intended transmission carrier frequency. ;COPYRIGHT: (C)2013,JPO&INPITPROBLEM TO BE SOLVED: To provide a direct RF modulation transmitter capable of satisfying a radiation level regulation even without providing a SAW filter.SOLUTION: A direct RF modulation transmitter includes: digital/RF converters 105, 106 to which an I digital baseband signal, a Q digital baseband signal, and a differential local signal are inputted, for modulating the differential local signal with the I digital baseband signal and the Q digital baseband signal; a PLL circuit 102 for generating a sampling clock signal fs which determines data rates of the I digital baseband signal and the Q digital baseband signal at the digital/RF converters 105, 106; and a sampling clock frequency setting circuit 101 for determining the frequency of the sampling clock signal fs generated by the PLL circuit 102, according to an intended transmission carrier frequency.

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