NO942879L - Krets for gjenvinning av bærebölge ved forskjövet QPSK modulering - Google Patents

Krets for gjenvinning av bærebölge ved forskjövet QPSK modulering

Info

Publication number
NO942879L
NO942879L NO942879A NO942879A NO942879L NO 942879 L NO942879 L NO 942879L NO 942879 A NO942879 A NO 942879A NO 942879 A NO942879 A NO 942879A NO 942879 L NO942879 L NO 942879L
Authority
NO
Norway
Prior art keywords
carrier
circuit
phase
value
detected
Prior art date
Application number
NO942879A
Other languages
English (en)
Other versions
NO942879D0 (no
Inventor
Kenichiro Chiba
Original Assignee
Nec Corp
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 Nec Corp filed Critical Nec Corp
Publication of NO942879D0 publication Critical patent/NO942879D0/no
Publication of NO942879L publication Critical patent/NO942879L/no

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
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/0028—Correction of carrier offset at passband only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0063—Elements of loops
    • H04L2027/0067—Phase error detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0083—Signalling arrangements
    • H04L2027/0089—In-band signals
    • H04L2027/0093—Intermittant signals
    • H04L2027/0095—Intermittant signals in a preamble or similar structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • H04L7/027—Speed or phase control by the received code signals, the signals containing no special synchronisation information extracting the synchronising or clock signal from the received signal spectrum, e.g. by using a resonant or bandpass circuit

Landscapes

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

Abstract

Det er beskrevet en krets for gjenvinning av bærebølger som er modulert ved forskjøvet, kvadraturfasedreiet nøkling (0-QPSK- bærebølger), og hvor hver av de to ortogonale sekvenser av puljesignaler som moduleres ved hjelp av et system med for- skjøvet, kvadraturfasedreiet nøkling, har et innledningsfelt som oppviser et foreskrevet bitmønster. I en Costassløyfe for bærebølgegjenvinning i et QPSK-system, gjør en tø-symbol- forsinkerkrets (14) fasene av puljesignaler som tilføres to ortogonale kanaler, innbyrdes like. En fasekomparator (19) for bittaktgjenvinngsfeltet (BTG-feltet) summerer ved hjelp av en addererkrets (193), en bærebølgeverdi påvist av en arctan- beregningskrets (191) og en verdi som stammer fra forsinkelse av den påviste bærebølgeverdi i en 1-symbol-forsinkerkrets (192), for å avgi den summerte, påviste bærebølgeverdi (h). En velgerkrets (22) veksler mellom utgangssignalene fra fasekomparatorene (18 - 20) og avgir sitt utgangssignal til et sløyfefilter (23).
NO942879A 1993-08-05 1994-08-03 Krets for gjenvinning av bærebölge ved forskjövet QPSK modulering NO942879L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5215288A JP2797916B2 (ja) 1993-08-05 1993-08-05 搬送波再生回路

Publications (2)

Publication Number Publication Date
NO942879D0 NO942879D0 (no) 1994-08-03
NO942879L true NO942879L (no) 1995-02-06

Family

ID=16669843

Family Applications (1)

Application Number Title Priority Date Filing Date
NO942879A NO942879L (no) 1993-08-05 1994-08-03 Krets for gjenvinning av bærebölge ved forskjövet QPSK modulering

Country Status (5)

Country Link
US (1) US5485489A (no)
EP (1) EP0637883B1 (no)
JP (1) JP2797916B2 (no)
DE (1) DE69434262T2 (no)
NO (1) NO942879L (no)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3349830B2 (ja) * 1994-07-29 2002-11-25 沖電気工業株式会社 クロック発生回路
JP2806296B2 (ja) * 1995-03-11 1998-09-30 日本電気株式会社 搬送波再生回路
KR960038686A (ko) * 1995-04-13 1996-11-21 김광호 단일 주파수에 의한 신호 송수신회로
JPH0918532A (ja) * 1995-06-30 1997-01-17 Nec Corp バーストモード通信システムにおける無線通信装置及び受信方法
JP3552183B2 (ja) * 1996-08-01 2004-08-11 松下電器産業株式会社 搬送波再生方法および装置
US5960044A (en) * 1996-11-14 1999-09-28 Scientific-Atlanta, Inc. Apparatus and method for block phase estimation
JP3080601B2 (ja) * 1997-06-06 2000-08-28 株式会社ケンウッド 搬送波再生回路
JPH11177644A (ja) * 1997-12-15 1999-07-02 Nec Corp ビットタイミング再生回路
US7197090B1 (en) 1999-01-29 2007-03-27 Northrop Grumman Corporation Adaptive decision regions and metrics
GR1003430B (el) * 1999-03-17 2000-09-07 �.�. �������� ���������� ��������������� & ����������... Δομη δεκτη για διαφορικη μεταθετικη διαμορφωση μετατοπισης φασης σε ορθογωνισμο
US6707863B1 (en) 1999-05-04 2004-03-16 Northrop Grumman Corporation Baseband signal carrier recovery of a suppressed carrier modulation signal
KR100542039B1 (ko) * 2002-07-02 2006-01-10 삼성탈레스 주식회사 이동통신장치의 프레임동기신호 발생장치
US7138882B2 (en) * 2002-11-08 2006-11-21 Northrop Grumman Corp Architecture for universal modulator
ES2325662T3 (es) 2003-08-14 2009-09-11 Lg Electronics Inc. Medio de grabacion, metodo de configuracion de informacion de control de dicho medio, metodo de grabacion y/o reproduccion usando dicho medio, y aparato de dicho metodo.
US9621274B2 (en) 2010-04-08 2017-04-11 Infinera Corporation Optical communication system
US8750444B2 (en) 2011-05-06 2014-06-10 Northrop Grumman Systems Corporation Snapshot processing of timing data
CN107132541B (zh) * 2017-06-14 2019-10-18 哈尔滨工程大学 多基地声纳低截获多址分辨信号生成方法
GB2575120B (en) * 2018-06-29 2020-09-30 Imagination Tech Ltd O-QPSK symbol timing estimation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2724145B2 (ja) * 1987-03-24 1998-03-09 株式会社日立製作所 搬送波再生装置
JPH0824260B2 (ja) * 1987-05-26 1996-03-06 日本電気株式会社 位相比較器
DE3851424T2 (de) * 1987-12-24 1995-01-19 Nec Corp Trägerrückgewinnungsschaltung eines Demodulators für verschobene quaternäre Phasenumtastung.
US5150384A (en) * 1990-09-28 1992-09-22 Motorola, Inc. Carrier recovery method and apparatus having an adjustable response time determined by carrier signal parameters
JPH04297168A (ja) * 1991-03-26 1992-10-21 Japan Radio Co Ltd キャリア再生装置
JP2808500B2 (ja) * 1991-08-23 1998-10-08 三菱重工業株式会社 ガスタービンの中空ファン動翼

Also Published As

Publication number Publication date
JPH0750700A (ja) 1995-02-21
EP0637883A2 (en) 1995-02-08
US5485489A (en) 1996-01-16
DE69434262D1 (de) 2005-03-17
NO942879D0 (no) 1994-08-03
DE69434262T2 (de) 2006-03-23
EP0637883A3 (en) 1995-07-05
EP0637883B1 (en) 2005-02-09
JP2797916B2 (ja) 1998-09-17

Similar Documents

Publication Publication Date Title
NO942879L (no) Krets for gjenvinning av bærebölge ved forskjövet QPSK modulering
CA1211517A (en) Correlated signal processor and modulator
CA1328681C (en) Differential phase-shift keying demodulator
CA2194695A1 (en) A direct conversion receiver
US5583884A (en) Spread spectrum modulation and demodulation systems which accelerate data rate without increasing multilevel indexing of primary modulation
US4313205A (en) Carrier synchronization and symbol synchronization for offset-QPSK burst communications
US4039749A (en) Spread spectrum demodulator
GB2295071A (en) Coherent phase-shift keying detector
CA2267425C (en) Cosine segment communications system
JPH021675A (ja) オフセットｑｐｓｋ方式用の搬送波再生回路
EP0008491B1 (en) Digital demodulator for phase shift keyed signals
US5469470A (en) Spread spectrum communication system using two-predetermined-code pseudo-noise signals
US6198763B1 (en) Transmitter and receiver for spread-spectrum communication
EP0881806B1 (en) Frame structure with a plurality of modulation formats
JPH08265384A (ja) 復調装置
EP0259867B1 (en) Demodulator for psk-modulated signals
JP2579243B2 (ja) 復調装置
CA1283707C (en) Receiver for a phase-shift keyed carrier signal
US4859959A (en) Data demodulator carrier phase error detector
US6813321B1 (en) Digital demodulator
US5841815A (en) Data receiver for correcting a phase of a received phase-modulated signal
DE69418328D1 (de) Mpsk-demodulator
US4800576A (en) Convolution data recovery circuit
JP3377858B2 (ja) クロック再生回路及びこれを用いた復調器
US7382846B1 (en) Off-symbol correlation technique

Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application