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

Shuichi Fukuda; Bram Nauta

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

Shuichi Fukuda (Inventor), Bram Nauta (Inventor)

Research output: Patent › Professional

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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 language	English
Patent number	JP2013038461 (A)
Publication status	Published - 21 Feb 2013

Fingerprint

Clocks

Transmitters

Modulation

Phase locked loops

Sampling

Networks (circuits)

Carrier communication

Radiation

Keywords

EWI-27358
IR-101895

Cite this

Fukuda, S., & Nauta, B. (2013). Direct RF modulation transmitter, sampling clock frequency setting method for direct RF modulation transmitter. (Patent No. JP2013038461 (A)).

Fukuda, Shuichi (Inventor) ; Nauta, Bram (Inventor). / Direct RF modulation transmitter, sampling clock frequency setting method for direct RF modulation transmitter. Patent No.: JP2013038461 (A).

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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.",

keywords = "EWI-27358, IR-101895",

author = "Shuichi Fukuda and Bram Nauta",

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Fukuda, S & Nauta, B 2013, Direct RF modulation transmitter, sampling clock frequency setting method for direct RF modulation transmitter, Patent No. JP2013038461 (A).

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: Patent › Professional

TY - PAT

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.

KW - EWI-27358

KW - IR-101895

M3 - Patent

M1 - JP2013038461 (A)

ER -

Fukuda S, Nauta B, inventors. Direct RF modulation transmitter, sampling clock frequency setting method for direct RF modulation transmitter. JP2013038461 (A). 2013 Feb 21.