JP2000517518A - ディジタル通信装置 - Google Patents
ディジタル通信装置Info
- Publication number
- JP2000517518A JP2000517518A JP10529423A JP52942398A JP2000517518A JP 2000517518 A JP2000517518 A JP 2000517518A JP 10529423 A JP10529423 A JP 10529423A JP 52942398 A JP52942398 A JP 52942398A JP 2000517518 A JP2000517518 A JP 2000517518A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- communication device
- digital communication
- term
- value
- 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
Links
- 238000004891 communication Methods 0.000 title claims abstract description 34
- 230000007774 longterm Effects 0.000 claims abstract description 26
- 238000012935 Averaging Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 4
- 230000032683 aging Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/02—Automatic frequency control
- H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Circuits Of Receivers In General (AREA)
- Superheterodyne Receivers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. 局部周波数発生器に接続されたミキサを有する受信機と、上記受信機に接 続された復調器と、上記復調器に接続され、上記局部周波数発生器の出力周波数 を表す周波数値と所望の同調周波数を表す周波数値の差である周波数オフセット 値を与えるための構造を有するマイクロコントローラと、上記周波数オフセット 値に依存して上記局部周波数発生器の周波数を調整する周波数調整手段とを含む ディジタル通信装置であって、 上記マイクロコントローラは、長期周波数ドリフトが短期周波数ドリフトから 分離されるように上記周波数オフセット値を処理するための構造を有し、 上記周波数調整手段は上記分離された長期周波数ドリフトに従って更新される 周波数調整基準値を含むことを特徴とするディジタル通信装置。 2. 上記周波数調整手段は上記周波数オフセットが零になるように初期にアラ イメントされる請求項1記載のディジタル通信装置。 3. 上記短期ドリフト及び上記長期ドリフトは実質的に異なる長さの平均化時 間に亘って上記周波数オフセット値を夫々に平均化することによって決定される 請求項1又は2記載のディジタル通信装置。 4. 周波数調整制御値及び上記周波数調整基準値は所定の関数に従って相互に 関連付けられる請求項3記載のディジタル通信装置。 5. 上記所定の関数は上記マイクロコントローラ内にルックアップテーブルと して格納される請求項4記載のディジタル通信装置。 6. 上記ディジタル通信装置はページャーであり、上記周波数オフセット値は 上記ページャーによって受信された同期語で決定される、請求項3記載のディジ タル通信装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97201870 | 1997-06-19 | ||
EP97201870.9 | 1997-06-19 | ||
PCT/IB1998/000589 WO1998058451A2 (en) | 1997-06-19 | 1998-04-20 | Digital communication device |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000517518A true JP2000517518A (ja) | 2000-12-26 |
JP4039492B2 JP4039492B2 (ja) | 2008-01-30 |
Family
ID=8228460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52942398A Expired - Fee Related JP4039492B2 (ja) | 1997-06-19 | 1998-04-20 | ディジタル通信装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US6233292B1 (ja) |
EP (1) | EP0919084B1 (ja) |
JP (1) | JP4039492B2 (ja) |
KR (1) | KR100533876B1 (ja) |
CN (1) | CN1146111C (ja) |
DE (1) | DE69831380T2 (ja) |
WO (1) | WO1998058451A2 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3466422B2 (ja) * | 1997-05-28 | 2003-11-10 | 株式会社ケンウッド | 受信装置 |
US6928275B1 (en) * | 2000-05-08 | 2005-08-09 | Qualcomm Incorporated | Method and apparatus for compensating local oscillator frequency error |
JP3988392B2 (ja) * | 2001-01-24 | 2007-10-10 | 日本電気株式会社 | 携帯無線端末、afc制御方法及びafc制御プログラム |
JP4257499B2 (ja) * | 2003-03-12 | 2009-04-22 | 日本電気株式会社 | 周波数補正方法、装置、および移動端末 |
US7065163B2 (en) | 2003-10-08 | 2006-06-20 | Qualcomm, Incorporated | Frequency error estimation using multiple integration lengths |
US7313205B2 (en) * | 2004-03-30 | 2007-12-25 | Motorola, Inc. | Method and apparatus for frequency correction in wireless local area network systems |
US7822397B2 (en) * | 2004-08-27 | 2010-10-26 | Silicon Laboratories Inc. | Method and apparatus for frequency hopping medium access control in a wireless network |
US7680224B2 (en) * | 2004-08-27 | 2010-03-16 | Silicon Laboratories Inc. | Apparatus and method for automatic frequency correction for a receiver system |
EP2592759B1 (en) | 2011-11-08 | 2016-09-14 | ST-Ericsson SA | Method for tuning an oscillator frequency and device implementing the method |
CN103557876B (zh) * | 2013-11-15 | 2016-01-20 | 山东理工大学 | 一种用于天线跟踪稳定平台的捷联惯导初始对准方法 |
US9548744B2 (en) | 2014-08-18 | 2017-01-17 | Qualcomm Incorporated | Compensating for hysteretic characteristics of crystal oscillators |
KR20180131855A (ko) * | 2017-06-01 | 2018-12-11 | 삼성전자주식회사 | 전자 장치 및 전자 장치에서 dcxo 제어 방법 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2205460B (en) * | 1987-06-02 | 1991-09-04 | Multitone Electronics Plc | Local oscillators for radio receivers |
CA2062737A1 (en) * | 1989-06-22 | 1990-12-23 | Michael John Yerbury | Self-calibrating temperature-compensated frequency source |
US5113416A (en) * | 1990-10-26 | 1992-05-12 | Ericsson Ge Mobile Communications Holding, Inc. | Digital radio frequency compensation |
US5493710A (en) * | 1991-08-02 | 1996-02-20 | Hitachi, Ltd. | Communication system having oscillation frequency calibrating function |
JP2581398B2 (ja) * | 1993-07-12 | 1997-02-12 | 日本電気株式会社 | Pll周波数シンセサイザ |
US5659884A (en) * | 1995-02-10 | 1997-08-19 | Matsushita Communication Industrial Corp. Of America | System with automatic compensation for aging and temperature of a crystal oscillator |
JP3186500B2 (ja) | 1995-03-29 | 2001-07-11 | 三菱電機株式会社 | 無線装置及び無線装置の調整方法 |
-
1998
- 1998-04-20 DE DE69831380T patent/DE69831380T2/de not_active Expired - Lifetime
- 1998-04-20 CN CNB98801145XA patent/CN1146111C/zh not_active Expired - Lifetime
- 1998-04-20 KR KR10-1999-7001302A patent/KR100533876B1/ko not_active IP Right Cessation
- 1998-04-20 JP JP52942398A patent/JP4039492B2/ja not_active Expired - Fee Related
- 1998-04-20 WO PCT/IB1998/000589 patent/WO1998058451A2/en active IP Right Grant
- 1998-04-20 EP EP98912655A patent/EP0919084B1/en not_active Expired - Lifetime
- 1998-06-18 US US09/099,499 patent/US6233292B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1236506A (zh) | 1999-11-24 |
DE69831380T2 (de) | 2006-06-08 |
US6233292B1 (en) | 2001-05-15 |
WO1998058451A3 (en) | 1999-03-11 |
EP0919084A2 (en) | 1999-06-02 |
EP0919084B1 (en) | 2005-08-31 |
KR100533876B1 (ko) | 2005-12-07 |
KR20000068186A (ko) | 2000-11-25 |
JP4039492B2 (ja) | 2008-01-30 |
CN1146111C (zh) | 2004-04-14 |
DE69831380D1 (de) | 2005-10-06 |
WO1998058451A2 (en) | 1998-12-23 |
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