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GB2256993A - Frequency and time slot synchronization using adaptive filtering - Google Patents
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GB2256993A - Frequency and time slot synchronization using adaptive filtering - Google Patents

Frequency and time slot synchronization using adaptive filtering

Info

Publication number
GB2256993A
GB2256993A GB9216946A GB9216946A GB2256993A GB 2256993 A GB2256993 A GB 2256993A GB 9216946 A GB9216946 A GB 9216946A GB 9216946 A GB9216946 A GB 9216946A GB 2256993 A GB2256993 A GB 2256993A
Authority
GB
United Kingdom
Prior art keywords
frequency
signal
fcb
filter
tone
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
GB9216946A
Other versions
GB2256993B (en
GB9216946D0 (en
Inventor
Arvind S Arora
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.)
Motorola Solutions Inc
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 GB9216946D0 publication Critical patent/GB9216946D0/en
Publication of GB2256993A publication Critical patent/GB2256993A/en
Application granted granted Critical
Publication of GB2256993B publication Critical patent/GB2256993B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662—Arrangements for Wireless System Synchronisation
    • H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
    • H04B7/2675—Frequency synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662—Arrangements for Wireless System Synchronisation
    • H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
    • H04B7/2678—Time synchronisation
    • H04B7/2681—Synchronisation of a mobile station with one base station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662—Arrangements for Wireless System Synchronisation
    • H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
    • H04B7/2678—Time synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L2007/047—Speed or phase control by synchronisation signals using special codes as synchronising signal using a sine signal or unmodulated carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

The synchronization process of the present invention filters the received signal with an adaptive band-pass filter (101) while buffering the received signal in memory (108). The energies of the input signal and the filtered signal are estimated (103 and 104) and the gain of the filter is adapted (105) based on the difference between the energies. The pole of the filter is adapted (102) to center the frequency of the input signal in the filter's pass-band. If a tone is detected (106), the length of the tone is determined (107) to ascertain if it is a frequency correction burst (FCB). If the tone detected is an FCB, the signal in the memory is also the FCB that is then filtered in the band-pass filter (101) and the difference between the frequency of this signal and 67.5 kHz is determined (109). This difference represents the frequency offset between the base station carrier frequency and that of the mobile radiotelephone, and can be fed into the local oscillating means to compensate for the frequency offset. The boundaries of the FCB establish the time slot alignment of the TDMA structure being received from the base station.
GB9216946A 1990-12-17 1991-12-11 Frequency and time slot synchronization using adaptive filtering Expired - Lifetime GB2256993B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US62853590A 1990-12-17 1990-12-17
PCT/US1991/009409 WO1992011706A1 (en) 1990-12-17 1991-12-11 Frequency and time slot synchronization using adaptive filtering

Publications (3)

Publication Number Publication Date
GB9216946D0 GB9216946D0 (en) 1992-10-07
GB2256993A true GB2256993A (en) 1992-12-23
GB2256993B GB2256993B (en) 1995-06-21

Family

ID=24519302

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9216946A Expired - Lifetime GB2256993B (en) 1990-12-17 1991-12-11 Frequency and time slot synchronization using adaptive filtering

Country Status (9)

Country Link
AU (1) AU636263B2 (en)
CA (1) CA2071552C (en)
DE (2) DE4193255T (en)
FR (1) FR2671248B1 (en)
GB (1) GB2256993B (en)
IL (1) IL100366A (en)
IT (1) IT1250962B (en)
SE (1) SE504792C2 (en)
WO (1) WO1992011706A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2534603A (en) * 2015-01-29 2016-08-03 Michell Instr Ltd System for analysing the frequency of a signal, a method thereof and a system for measuring the relative phase between two input signals

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709894B1 (en) * 1993-09-10 1995-10-20 Alcatel Mobile Comm France Method for determining, by a mobile station of a cellular radiocommunication system, the type of cell to which it is attached, mobile station and base station.
US5761250A (en) * 1995-08-15 1998-06-02 Rockwell International Corporation Iterative filtering frequency estimator and estimation method
DE19722219A1 (en) * 1997-05-28 1998-12-03 Alsthom Cge Alcatel Radio communication system with a fixed and a movable radio device
JP3088338B2 (en) * 1997-05-28 2000-09-18 埼玉日本電気株式会社 Wireless telephone equipment
US6278699B1 (en) 1998-06-22 2001-08-21 Telefonaktiebolaget Lm Ericsson (Publ) Synchronization techniques and systems for spread spectrum radiocommunication
US6356608B1 (en) 1998-06-29 2002-03-12 Telefonaktiebolaget Lm Ericsson (Publ) Method, apparatus, and system for determining a location of a frequency synchronization signal
US6473420B1 (en) * 2001-02-16 2002-10-29 Harris Corporation Wideband ranging process for frequency acquisition

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317220A (en) * 1979-02-05 1982-02-23 Andre Martin Simulcast transmission system
US4466130A (en) * 1982-10-04 1984-08-14 Ael Microtel Limited Two pilot frequency control for communication systems
US4802191A (en) * 1986-02-28 1989-01-31 National Research Development Corporation Data transmission using a transparent tone-in band system
US4977580A (en) * 1988-08-15 1990-12-11 Northern Telecom Limited Timing and carrier recovery in TDMA without preamble sequence

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3508069C2 (en) * 1985-03-07 1993-12-02 Aeg Mobile Communication Single-wave radio with re-adjusted transmitter frequency
DK0387720T3 (en) * 1989-03-16 1994-03-21 Siemens Ag Link for recognizing a frequency reference signal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317220A (en) * 1979-02-05 1982-02-23 Andre Martin Simulcast transmission system
US4466130A (en) * 1982-10-04 1984-08-14 Ael Microtel Limited Two pilot frequency control for communication systems
US4802191A (en) * 1986-02-28 1989-01-31 National Research Development Corporation Data transmission using a transparent tone-in band system
US4977580A (en) * 1988-08-15 1990-12-11 Northern Telecom Limited Timing and carrier recovery in TDMA without preamble sequence

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2534603A (en) * 2015-01-29 2016-08-03 Michell Instr Ltd System for analysing the frequency of a signal, a method thereof and a system for measuring the relative phase between two input signals
US9461662B2 (en) 2015-01-29 2016-10-04 Michell Instruments Limited System for analyzing the frequency of a signal, a method thereof and a system for measuring the relative phase between two input signals
GB2534603B (en) * 2015-01-29 2019-07-31 Michell Instruments Ltd System for analysing the frequency of a signal, a method thereof and a system for measuring the relative phase between two input signals

Also Published As

Publication number Publication date
DE4193255C2 (en) 1997-02-20
CA2071552C (en) 1997-02-25
IL100366A0 (en) 1992-09-06
FR2671248B1 (en) 1994-11-04
SE9202350L (en) 1992-08-14
GB2256993B (en) 1995-06-21
IT1250962B (en) 1995-04-24
ITRM910944A0 (en) 1991-12-17
DE4193255T (en) 1992-12-10
CA2071552A1 (en) 1992-06-18
SE504792C2 (en) 1997-04-28
FR2671248A1 (en) 1992-07-03
WO1992011706A1 (en) 1992-07-09
AU9169291A (en) 1992-07-22
SE9202350D0 (en) 1992-08-14
AU636263B2 (en) 1993-04-22
IL100366A (en) 1995-05-26
GB9216946D0 (en) 1992-10-07
ITRM910944A1 (en) 1993-06-17

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Legal Events

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

Expiry date: 20111210

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20120112 AND 20120118