GR1003430B - Δομη δεκτη για διαφορικη μεταθετικη διαμορφωση μετατοπισης φασης σε ορθογωνισμο - Google Patents

Δομη δεκτη για διαφορικη μεταθετικη διαμορφωση μετατοπισης φασης σε ορθογωνισμο

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Publication number
GR1003430B
GR1003430B GR990100089A GR990100089A GR1003430B GR 1003430 B GR1003430 B GR 1003430B GR 990100089 A GR990100089 A GR 990100089A GR 990100089 A GR990100089 A GR 990100089A GR 1003430 B GR1003430 B GR 1003430B
Authority
GR
Greece
Prior art keywords
phase
receiver structure
demodulator
differential
frequency signal
Prior art date
Application number
GR990100089A
Other languages
English (en)
Inventor
Original Assignee
�.�. �������� ���������� ��������������� & ����������...
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 �.�. �������� ���������� ��������������� & ����������... filed Critical �.�. �������� ���������� ��������������� & ����������...
Publication of GR1003430B publication Critical patent/GR1003430B/el

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
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H04L2025/03401—PSK
    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H04L2025/03401—PSK
    • H04L2025/03407—Continuous phase
    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03178—Arrangements involving sequence estimation techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Η παρούσα εφεύρεση αφορά μια μέθοδο και μια συσκευή για διαφορικά σύμφωνη λήψη Διαφορικής Μεταθετικής Μετατόπισης Φάσης σε Ορθογωνισμό (ODQPSK) και μερικά σχήματα σηματοδοσίας Συνεχούς Διαμόρφωσης Φάσης (CPM). Η μέθοδος εφαρμόζεται σε μια δομή δέκτη η οποία ουσιαστικά χαρακτηρίζεται από έναν από δύο εναλλακτικούς τύπους διαφορικά σύμφωνου αποδιαμορφωτή που ακολουθείται από ένα μέσον αναδρομικού υπολογισμού δύο εισόδων επιφορτισμένο με την ταυτόχρονη εξίσωση καναλιού και ευέλικτη διαφορική αποκωδικοποίηση. Ο ένας τύπους αποδιαμορφωτή περιλαμβάνει συσχετισμό ενός σήματος δέκτη σε ενδιάμεση συχνότητα με δύο καθυστερημένες εκδόσεις του που διαφέρουν κατά μισή περίοδο bit και κατωπερατό φιλτράρισμα. Ο δεύτερος τύπος αποδιαμορφωτή περιλαμβάνει διαδοχικά στάδια υποβιβασμού συχνότητας του σήματος δέκτη χρησιμοποιώντας έναν ελεύθερο τοπικό ταλαντωτή, προσαρμοσμένο φιλτράρισμα, εξαγωγή και διαφόριση φάσης και καθυστέρηση φάσης κατά μισή περίοδο bit. Η εφεύρεση πιο συγκεκριμένα βρίσκει εφαρμογή στις ασύρματες τοπικές επικοινωνίες καθώς και σε δορυφορικές και κινητές επικοινωνίες.ΰ
GR990100089A 1999-03-17 1999-03-17 Δομη δεκτη για διαφορικη μεταθετικη διαμορφωση μετατοπισης φασης σε ορθογωνισμο GR1003430B (el)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GR99100089 1999-03-17

Publications (1)

Publication Number Publication Date
GR1003430B true GR1003430B (el) 2000-09-07

Family

ID=10943768

Family Applications (1)

Application Number Title Priority Date Filing Date
GR990100089A GR1003430B (el) 1999-03-17 1999-03-17 Δομη δεκτη για διαφορικη μεταθετικη διαμορφωση μετατοπισης φασης σε ορθογωνισμο

Country Status (2)

Country Link
EP (1) EP1037439A1 (el)
GR (1) GR1003430B (el)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113615139A (zh) * 2019-01-17 2021-11-05 赛峰数据系统公司 用pam分解接收soqpsk-tg信号的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR1003877B (el) * 2001-04-19 2002-04-24 Σεργιος Θεοδωριδης Ακολουθιακος εξισωτης καναλιου για συστημα σηματοδοσιας τετραδικου κλειδωματος μεταλλαγης φασης
EP2383949B1 (en) * 2010-04-29 2016-01-06 Xieon Networks S.à r.l. Method and arrangement for signal processing in a communication system
CN109861939B (zh) * 2019-01-25 2021-09-10 西安思丹德信息技术有限公司 一种oqpsk频域均衡无线数据传输方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0637883A2 (en) * 1993-08-05 1995-02-08 Nec Corporation Carrier recovery circuit for offset QPSK demodulators
US5615230A (en) * 1994-03-01 1997-03-25 Ascom Tech Ag Process for transmitting digital signals which combines advantages of OQPSK and π/4-QPSK
EP0792053A1 (fr) * 1996-02-21 1997-08-27 Koninklijke Philips Electronics N.V. Système de transmissions numériques à modulation à phase continue

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0637883A2 (en) * 1993-08-05 1995-02-08 Nec Corporation Carrier recovery circuit for offset QPSK demodulators
US5615230A (en) * 1994-03-01 1997-03-25 Ascom Tech Ag Process for transmitting digital signals which combines advantages of OQPSK and π/4-QPSK
EP0792053A1 (fr) * 1996-02-21 1997-08-27 Koninklijke Philips Electronics N.V. Système de transmissions numériques à modulation à phase continue

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
ADACHI F: "REDUCED-STATE VITERBI DIFFERENTIAL DETECTION USING A RECURSIVELY ESTIMATED PHASE REFERENCE FOR M-ARY DPSK", IEE PROCEEDINGS: COMMUNICATIONS, vol. 142, no. 4, 1 August 1995 (1995-08-01), pages 263 - 270, XP000530228, ISSN: 1350-2425 *
GHASSAN KAWAS KALEH: "DIFFERENTIAL DETECTION VIA THE VITERBI ALGORITHM FOR OFFSET MODULATION AND MSK-TYPE SIGNALS", IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, vol. 41, no. 4, 1 November 1992 (1992-11-01), pages 401 - 406, XP000362354, ISSN: 0018-9545 *
GUNTHER C G ET AL: "DOQPSK - DIFFERENTIAL DEMODULATION OF FILTERED OFFSET QPSK", PROCEEDINGS OF THE VEHICULAR TECHNOLOGY CONFERENCE, STOCKHOLM, JUNE 8 - 10, 1994, vol. 3, no. CONF. 44, 8 June 1994 (1994-06-08), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 1542 - 1546, XP000497680, ISBN: 0-7803-1928-1 *
HLADIK S M ET AL: "PERFORMANCE OF DIFFERENTIALLY DETECTED /4-SHIFTED DQPSK WITH DIVERSITY", FROM PIONEERS TO THE 21ST. CENTURY, DENVER, MAY 10 - 13, 1992, vol. 2, no. CONF. 42, 10 May 1992 (1992-05-10), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 748 - 751, XP000339892, ISBN: 0-7803-0673-2 *
MAKRAKIS D ET AL: "AN IMPROVED VITERBI DECODER FOR THE DIFFERENTIAL DETECTION OF CONTINUOUS PHASE MODULATION SCHEMES", DIGITAL COMMUNICATIONS, SASKATOON, MAY 11 - 12, 1988, no. CONF. 2, 11 May 1988 (1988-05-11), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 78 - 87, XP000012943 *
SPILKER J J: "COHERENT AND DIFFERENTIALLY COHERENT TRANSMISSION TECHNIQUES", DIGITAL COMMUNICATIONS BY SATELLITE, 1977, pages 295 - 335, XP000763848 *
THEODORIDIS S ET AL: "SCHEMES FOR EQUALISATION OF COMMUNICATION CHANNELS WITH NONLINEAR IMPAIRMENTS", IEE PROCEEDINGS: COMMUNICATIONS, vol. 142, no. 3, 1 June 1995 (1995-06-01), pages 165 - 171, XP000522228, ISSN: 1350-2425 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113615139A (zh) * 2019-01-17 2021-11-05 赛峰数据系统公司 用pam分解接收soqpsk-tg信号的方法
CN113615139B (zh) * 2019-01-17 2024-03-22 赛峰数据系统公司 用pam分解接收soqpsk-tg信号的方法

Also Published As

Publication number Publication date
EP1037439A1 (en) 2000-09-20

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