GB2071966A - Converter included in a phase modulator - Google Patents

Converter included in a phase modulator Download PDF

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Publication number
GB2071966A
GB2071966A GB8115203A GB8115203A GB2071966A GB 2071966 A GB2071966 A GB 2071966A GB 8115203 A GB8115203 A GB 8115203A GB 8115203 A GB8115203 A GB 8115203A GB 2071966 A GB2071966 A GB 2071966A
Authority
GB
United Kingdom
Prior art keywords
phase
symbols
present
phase state
symbol
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
GB8115203A
Other versions
GB2071966B (en
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB2071966A publication Critical patent/GB2071966A/en
Application granted granted Critical
Publication of GB2071966B publication Critical patent/GB2071966B/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03834—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping
    • 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
    • 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

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

A converter is included in a modulator for phase modulation of data symbols (//c<un>u) and converts the data symbols received each in one time interval to sequences of phase values (//c+//c<un>u). Based on symbol correlation the present phase value sequence is calculated out of an arbitrary rational modulation index, of the present phase state (//c<un>u) which is associated with a first number of symbols previously received and which defines a phase state number, and of a pulse response which extends over the present symbol and a second number of preceding symbols. There exists a finite number of phase value sequences which are stored in digital form in a memory arrangement (MA) and each accessible with an associated address. Any arbitrary sequence of data symbols results in continuous phase transition. A calculating unit (CU) calculates during each time interval a phase state number (v<sn>s). The memory arrangement comprises an access unit to generate the address, which is determined by the present data symbol, by the previously mentioned second number of preceding symbols and by the last phase state number received from the calculating unit.

Description

The application was originally made under the Patent Cooperation Treaty
with the Swedish Patent Office acting as the receiving office on (86) 8Jun 1979, being given an application number PCT/SE79100130. The application was searched by the Swedish Patent Office acting as the International Search Authority (ISA), and published by the International Bureau on (87) 24 Dec 1980 under serial number W080,02900 in the Eng I ish language. The text of the application is contained in the publication made by the International Bureau as above identified.
(12)UK Patent Application,,,, GB 2 071 966 A (21) Application No 8115263 (22) Date of filing 8Jun 1979 (43) Date of issue 23 Sep 1981 (51) INTCL' (as given by ISA) H04L 27120 H03C 3/00 (52) Domestic classification 1-1413 APM (56) Documents cited by ISA DE, A1,2 838 984 IEEEE Transactions on communications, Vol Com-26, No 5, May 1978 P. 534-542, F De Jager, C B Dekker, Aulin, Rydbeck, Sundberg; "Further results on Digital FM with coherent phase tree demodulation -minimum distance and spectrum," Technical Report TR-1 19, November 1978, Telecommunication Theory, University of Lund, Sweden.
(58) Field of search by ISA INTCL H04L27100,27/18, 27/20; H03C3/00,3/02 Deutsche K1. 21: a 7/03, 7108 US CL 178:67; 325: 45-47,145-148; 332; 16-24 (71) Applicants Telefonaktiebolaget L M Ericsson, S - 126 25 Stockholm, mern. orr, (.9) ERRATUM SPECIFICATION NO 2071966A
Front page, heading (21) Application No.for 8115263 read 8115203 THE PATENT OFFICE December 1981 (54) Converter included in a phase modulator (57) A converter is included in a modulator for phase modulation of data symbols (an) and converts the data symbols received each in one time interval to sequences of phase values (6+6n). Based on symbol correlation the present phase value sequence is calculated out of an arbitrary rational modulation index, of the present phase state, (Un) which is associated with a first number of symbols previously received and which defines a phase state number, and of a pulse response which extends over the present symbol and a second number of preceding symbols. There exists a finite number of phase value sequences which are stored in digital form in a memory arrangement (MA) and each accessible with an associated address, Any arbitrary sequence of data symbols results in continuous phase transitions. A calculating unit (CU) calculates during each time inter. val a phase state number (v,,). The memory arrangement comprises an acesss unit to generate the address, which is determined by the present data symbol, by the previously mentioned second number of preceding symbols and by the last phase state number received from the calculating unit.
fzm. 11 T 1 1CountAC) j LEj 1 colc- unit (CUi Bas 8722015 1,0) 0(11-ROM sin - D31 A (0 Gn) i cl c c 1 00
GB8115203A 1979-06-08 1979-06-08 Converter included in a phase modulator Expired GB2071966B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1979/000130 WO1980002900A1 (en) 1979-06-08 1979-06-08 Converter included in a phase modulator

Publications (2)

Publication Number Publication Date
GB2071966A true GB2071966A (en) 1981-09-23
GB2071966B GB2071966B (en) 1983-10-26

Family

ID=20336957

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8115203A Expired GB2071966B (en) 1979-06-08 1979-06-08 Converter included in a phase modulator

Country Status (5)

Country Link
JP (1) JPS5635560A (en)
CH (1) CH654155A5 (en)
DE (1) DE2953707A1 (en)
GB (1) GB2071966B (en)
WO (1) WO1980002900A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6029691U (en) * 1983-08-02 1985-02-28 武藤工業株式会社 Tail roller support device for rail type flexible parallel rulers, etc.
US5027372A (en) * 1987-03-04 1991-06-25 National Semiconductor Corp. Differential phase shift keying modulator
US5121412A (en) * 1989-01-03 1992-06-09 Motorola, Inc. All-digital quadrature modulator
DE3939259A1 (en) * 1989-11-28 1991-05-29 Rohde & Schwarz FREQUENCY MODULABLE FREQUENCY GENERATOR
KR100207594B1 (en) * 1993-03-30 1999-07-15 윤종용 Method and apparatus for quadrature phase shift-keying modulation with automatic coding
JP3183747B2 (en) * 1993-04-14 2001-07-09 松下電器産業株式会社 Digital signal transmission method, digital signal transmission device, and digital signal transmission waveform
FR2777145B1 (en) 1998-04-02 2000-04-28 Alsthom Cge Alcatel BROADBAND MULTI-CARRIER MODULATOR AND CORRESPONDING PROGRAMMING METHOD

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2110845A5 (en) * 1970-10-29 1972-06-02 Ibm France
GB1488434A (en) * 1974-11-21 1977-10-12 Ibm Fsk modulator
NL7709917A (en) * 1977-09-09 1979-03-13 Philips Nv SYSTEM FOR DATA TRANSMISSION USING AN ANGLE MODULATED CARRIER OF CONSTANT AMPLITUDE.

Also Published As

Publication number Publication date
WO1980002900A1 (en) 1980-12-24
DE2953707A1 (en) 1982-02-25
GB2071966B (en) 1983-10-26
CH654155A5 (en) 1986-01-31
JPS5635560A (en) 1981-04-08

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19990607