JPS5585161A - Msk modulation unit - Google Patents

Msk modulation unit

Info

Publication number
JPS5585161A
JPS5585161A JP15944278A JP15944278A JPS5585161A JP S5585161 A JPS5585161 A JP S5585161A JP 15944278 A JP15944278 A JP 15944278A JP 15944278 A JP15944278 A JP 15944278A JP S5585161 A JPS5585161 A JP S5585161A
Authority
JP
Japan
Prior art keywords
output
msk modulator
phase
multiplier
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP15944278A
Other languages
Japanese (ja)
Other versions
JPS5829030B2 (en
Inventor
Hiroshi Suzuki
Kazuaki Murota
Kenkichi Hiraide
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP15944278A priority Critical patent/JPS5829030B2/en
Publication of JPS5585161A publication Critical patent/JPS5585161A/en
Publication of JPS5829030B2 publication Critical patent/JPS5829030B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
    • H04L27/2007—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained
    • H04L27/2014—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained in which the phase changes in a piecewise linear manner during each symbol period, e.g. minimum shift keying, fast frequency shift keying

Abstract

PURPOSE:To stabilize the modulation frequency, by enabling to use the simple MSK modulator, through the feedback of phase drift part to the MSK modulator. CONSTITUTION:The data input signal is given to the input of simple MSK modulator 6 and MSK modulator is picked up from the output. This output is branched and given to the cosine phase comparator 9, and sine phase comparator 10, and in phase comparison with the output signal of the reference signal oscillator 4. The comparison output of the both comparators 9, 10 is multiplied at the multiplier 2 and further multiplied by the signal in 1/2 frequency division of the clock of the multiplier 2'. The output of the multiplier 2' is fed to the MSK modulator 6 via the low pass filter 11 and the drift of phase can be rejected.
JP15944278A 1978-12-21 1978-12-21 MSK modulator Expired JPS5829030B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15944278A JPS5829030B2 (en) 1978-12-21 1978-12-21 MSK modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15944278A JPS5829030B2 (en) 1978-12-21 1978-12-21 MSK modulator

Publications (2)

Publication Number Publication Date
JPS5585161A true JPS5585161A (en) 1980-06-26
JPS5829030B2 JPS5829030B2 (en) 1983-06-20

Family

ID=15693836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15944278A Expired JPS5829030B2 (en) 1978-12-21 1978-12-21 MSK modulator

Country Status (1)

Country Link
JP (1) JPS5829030B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60173960A (en) * 1984-02-17 1985-09-07 Matsushita Electric Ind Co Ltd Msk modulator
JPH0514425A (en) * 1991-06-28 1993-01-22 Kenwood Corp Msk modulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60173960A (en) * 1984-02-17 1985-09-07 Matsushita Electric Ind Co Ltd Msk modulator
JPH0514425A (en) * 1991-06-28 1993-01-22 Kenwood Corp Msk modulator

Also Published As

Publication number Publication date
JPS5829030B2 (en) 1983-06-20

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