FI901192A0 - GMSK modulator - Google Patents

GMSK modulator

Info

Publication number
FI901192A0
FI901192A0 FI901192A FI901192A FI901192A0 FI 901192 A0 FI901192 A0 FI 901192A0 FI 901192 A FI901192 A FI 901192A FI 901192 A FI901192 A FI 901192A FI 901192 A0 FI901192 A0 FI 901192A0
Authority
FI
Finland
Prior art keywords
gmsk
sideband
arrangement
modulator
gmsk modulator
Prior art date
Application number
FI901192A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI97760B (en
FI97760C (en
Inventor
Otmar Ringelhaan
Horst Fenske
Gerhard Eichinger
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of FI901192A0 publication Critical patent/FI901192A0/en
Publication of FI97760B publication Critical patent/FI97760B/en
Application granted granted Critical
Publication of FI97760C publication Critical patent/FI97760C/en

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
    • H04L27/2017—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Circuits Of Receivers In General (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

The invention relates to an arrangement for modulation of a digital message according to the GMSK method (Gaussian Minimum Shift Keying) which displays behaviour similar to that of a single-sideband modulator due to appropriate pre-processing (pre-coding). A device of a simple type is to be produced for the generation of a GMSK signal. For this purpose, the invention provides for a selection of the intermediate frequency of the generated single-sideband spectrum (modulator output frequency) such that the condition f(ZF) = ft/4 + n . ft/2 for n >/= 1 is satisfied, in which the system has a clearly defined pulse response. The system is implemented by means of a transversal filter and the entire arrangement in a PROM. <IMAGE>
FI901192A 1989-03-09 1990-03-08 GMSK modulator FI97760C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP89104193 1989-03-09
EP89104193 1989-03-09

Publications (3)

Publication Number Publication Date
FI901192A0 true FI901192A0 (en) 1990-03-08
FI97760B FI97760B (en) 1996-10-31
FI97760C FI97760C (en) 1997-02-10

Family

ID=8201072

Family Applications (1)

Application Number Title Priority Date Filing Date
FI901192A FI97760C (en) 1989-03-09 1990-03-08 GMSK modulator

Country Status (9)

Country Link
EP (1) EP0386412B1 (en)
AT (1) ATE104492T1 (en)
DE (1) DE59005305D1 (en)
DK (1) DK0386412T3 (en)
ES (1) ES2051391T3 (en)
FI (1) FI97760C (en)
IE (1) IE65459B1 (en)
NO (1) NO901037L (en)
PT (1) PT93368B (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969590A (en) * 1975-04-04 1976-07-13 Rockwell International Corporation Surface acoustic wave apparatus
US4648099A (en) * 1984-12-17 1987-03-03 Allied Corporation Digital minimum shift keyed modulator

Also Published As

Publication number Publication date
ES2051391T3 (en) 1994-06-16
EP0386412B1 (en) 1994-04-13
PT93368B (en) 1996-05-31
EP0386412A1 (en) 1990-09-12
ATE104492T1 (en) 1994-04-15
IE65459B1 (en) 1995-11-01
DK0386412T3 (en) 1994-06-20
PT93368A (en) 1990-11-07
IE900832L (en) 1990-09-09
FI97760B (en) 1996-10-31
NO901037D0 (en) 1990-03-05
FI97760C (en) 1997-02-10
DE59005305D1 (en) 1994-05-19
NO901037L (en) 1990-09-10

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Legal Events

Date Code Title Description
FG Patent granted

Owner name: SIEMENS AKTIENGESELLSCHAFT

BB Publication of examined application
MM Patent lapsed
MM Patent lapsed

Owner name: SIEMENS AKTIENGESELLSCHAFT