JPS5585161A - Msk modulation unit - Google Patents
Msk modulation unitInfo
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
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.
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)
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 |
-
1978
- 1978-12-21 JP JP15944278A patent/JPS5829030B2/en not_active Expired
Cited By (2)
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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