MX171396B - Modulador digital mejorado que tiene un dispositivo de memoria pre programada - Google Patents

Modulador digital mejorado que tiene un dispositivo de memoria pre programada

Info

Publication number
MX171396B
MX171396B MX018441A MX1844189A MX171396B MX 171396 B MX171396 B MX 171396B MX 018441 A MX018441 A MX 018441A MX 1844189 A MX1844189 A MX 1844189A MX 171396 B MX171396 B MX 171396B
Authority
MX
Mexico
Prior art keywords
signal
clock signal
input data
rom
channel
Prior art date
Application number
MX018441A
Other languages
English (en)
Inventor
Chih-Fei Wang
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of MX171396B publication Critical patent/MX171396B/es

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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/08—Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator

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)
  • Transmitters (AREA)
  • Complex Calculations (AREA)
  • Holo Graphy (AREA)
  • Amplifiers (AREA)
  • Gyroscopes (AREA)
  • Amplitude Modulation (AREA)

Abstract

La presente invención se refiere a un modulador ejorado que tiene al menos un dispositivo de memoria preprogramado, el cual puede ser direccionado selectivamente de tal manera que genere una forma de onda digital representativa, basada en una corriente de datos de entrada, una señal de reloj, y el contenido preprogramado del dispositivo de memoria, en el que la forma de onda digital se convierte por medio de un convertidor digital-analógico a una señal analógica para la modulación de radio frecuencia para proporcionar una portadora modulada en donde la mejora comprende un medio para direccionar selectivamente el dispositivo de memoria, para especificar la fase de la señal analógica, en respuesta a una señal indicativa de un intervalo de bitno entero, con lo cual se mantiene la continuidad de fase de la portadora modulada.
MX018441A 1988-11-30 1989-11-22 Modulador digital mejorado que tiene un dispositivo de memoria pre programada MX171396B (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27808088A 1988-11-30 1988-11-30

Publications (1)

Publication Number Publication Date
MX171396B true MX171396B (es) 1993-10-22

Family

ID=23063601

Family Applications (1)

Application Number Title Priority Date Filing Date
MX018441A MX171396B (es) 1988-11-30 1989-11-22 Modulador digital mejorado que tiene un dispositivo de memoria pre programada

Country Status (17)

Country Link
EP (1) EP0371751B1 (es)
JP (1) JP2797710B2 (es)
KR (1) KR940000922B1 (es)
AT (1) ATE128302T1 (es)
CA (1) CA2000475C (es)
DE (1) DE68924332T2 (es)
DK (1) DK101691D0 (es)
ES (1) ES2077585T3 (es)
GR (1) GR3018008T3 (es)
HK (1) HK1000407A1 (es)
IE (1) IE69762B1 (es)
IL (1) IL91945A (es)
MX (1) MX171396B (es)
MY (1) MY104453A (es)
PT (1) PT92434B (es)
TR (1) TR24950A (es)
WO (1) WO1990006624A1 (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4036512A1 (de) * 1990-11-16 1992-05-21 Philips Patentverwaltung Digitale schaltungsanordnung zur naeherungsweisen realisierung einer gmsk (gaussian minimum shift keying)-modulation
US5495505A (en) * 1990-12-20 1996-02-27 Motorola, Inc. Increased frequency resolution in a synthesizer
JP2968350B2 (ja) * 1991-01-11 1999-10-25 三菱電機株式会社 直交変調回路
FR2675001B1 (fr) * 1991-04-03 1993-07-30 Matra Communication Procede et dispositif de modulation numerique a composantes en phase et en quadrature et installation de transmission en comportant application.
US5361046A (en) * 1992-12-22 1994-11-01 Hughes Aircraft Company Modulator having fractional sample/symbol time
GB2335122A (en) * 1998-03-05 1999-09-08 Motorola Gmbh Transmitter adapted to reduce adjacent channel interference
CN107171995B (zh) * 2017-02-27 2020-09-29 西安宇飞电子技术有限公司 Gmsk信号生成装置及方法、信号检测装置及方法
CN110798420B (zh) * 2019-11-08 2022-04-19 天津津航计算技术研究所 一种内插倍数可变的gmsk调制实现方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5630340A (en) * 1979-08-20 1981-03-26 Sony Corp Digital signal transmitting method
JPS5647153A (en) * 1979-09-27 1981-04-28 Toshiba Corp Digital phase modulation system
NL8402318A (nl) * 1984-07-23 1986-02-17 Philips Nv Inrichting voor het genereren van een hoekgemoduleerd draaggolfsignaal van constante amplitude in responsie op datasignalen.

Also Published As

Publication number Publication date
KR940000922B1 (ko) 1994-02-04
JPH04502540A (ja) 1992-05-07
JP2797710B2 (ja) 1998-09-17
TR24950A (tr) 1992-07-28
IL91945A0 (en) 1990-06-10
DK101691A (da) 1991-05-28
HK1000407A1 (en) 1998-03-20
WO1990006624A1 (en) 1990-06-14
EP0371751A3 (en) 1992-01-29
ATE128302T1 (de) 1995-10-15
ES2077585T3 (es) 1995-12-01
DE68924332D1 (de) 1995-10-26
PT92434B (pt) 1998-04-30
EP0371751A2 (en) 1990-06-06
IL91945A (en) 1994-01-25
EP0371751B1 (en) 1995-09-20
IE69762B1 (en) 1996-10-02
KR900702633A (ko) 1990-12-07
DE68924332T2 (de) 1996-05-15
IE893247L (en) 1990-05-30
CA2000475A1 (en) 1990-05-31
DK101691D0 (da) 1991-05-28
MY104453A (en) 1994-03-31
CA2000475C (en) 1994-05-03
IE893247A1 (en) 1991-06-05
GR3018008T3 (en) 1996-02-29
PT92434A (pt) 1990-05-31

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