SE9202350D0 - FREQUENCY AND TIME LOCK SYNCISM USING ADAPTIVE FILTERING - Google Patents

FREQUENCY AND TIME LOCK SYNCISM USING ADAPTIVE FILTERING

Info

Publication number
SE9202350D0
SE9202350D0 SE9202350A SE9202350A SE9202350D0 SE 9202350 D0 SE9202350 D0 SE 9202350D0 SE 9202350 A SE9202350 A SE 9202350A SE 9202350 A SE9202350 A SE 9202350A SE 9202350 D0 SE9202350 D0 SE 9202350D0
Authority
SE
Sweden
Prior art keywords
frequency
signal
fcb
filter
tone
Prior art date
Application number
SE9202350A
Other languages
Swedish (sv)
Other versions
SE9202350L (en
SE504792C2 (en
Inventor
A S Arora
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 SE9202350L publication Critical patent/SE9202350L/en
Publication of SE9202350D0 publication Critical patent/SE9202350D0/en
Publication of SE504792C2 publication Critical patent/SE504792C2/en

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

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.
SE9202350A 1990-12-17 1992-08-14 Frequency and time slot synchronization using adaptive filtering SE504792C2 (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
SE9202350L SE9202350L (en) 1992-08-14
SE9202350D0 true SE9202350D0 (en) 1992-08-14
SE504792C2 SE504792C2 (en) 1997-04-28

Family

ID=24519302

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9202350A SE504792C2 (en) 1990-12-17 1992-08-14 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)

Families Citing this family (8)

* 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
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

Family Cites Families (6)

* 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
DE3508069C2 (en) * 1985-03-07 1993-12-02 Aeg Mobile Communication Single-wave radio with re-adjusted transmitter frequency
GB8604981D0 (en) * 1986-02-28 1986-04-09 Mcgeehan J P Data transmission
CA1288878C (en) * 1988-08-15 1991-09-10 John D. Mcnicol Timing and carrier recovery in tdma without preamable sequence
DE59003646D1 (en) * 1989-03-16 1994-01-13 Siemens Ag Circuit for the detection of a frequency reference signal.

Also Published As

Publication number Publication date
WO1992011706A1 (en) 1992-07-09
GB2256993B (en) 1995-06-21
FR2671248A1 (en) 1992-07-03
GB9216946D0 (en) 1992-10-07
GB2256993A (en) 1992-12-23
FR2671248B1 (en) 1994-11-04
DE4193255T (en) 1992-12-10
IL100366A (en) 1995-05-26
CA2071552C (en) 1997-02-25
AU9169291A (en) 1992-07-22
SE9202350L (en) 1992-08-14
IT1250962B (en) 1995-04-24
AU636263B2 (en) 1993-04-22
ITRM910944A1 (en) 1993-06-17
IL100366A0 (en) 1992-09-06
CA2071552A1 (en) 1992-06-18
DE4193255C2 (en) 1997-02-20
ITRM910944A0 (en) 1991-12-17
SE504792C2 (en) 1997-04-28

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Legal Events

Date Code Title Description
NUG Patent has lapsed