JPH07504311A - 相関同期フィルタ処理を用いた適応型最尤シーケンス推定方法および装置 - Google Patents
相関同期フィルタ処理を用いた適応型最尤シーケンス推定方法および装置Info
- Publication number
- JPH07504311A JPH07504311A JP6515159A JP51515993A JPH07504311A JP H07504311 A JPH07504311 A JP H07504311A JP 6515159 A JP6515159 A JP 6515159A JP 51515993 A JP51515993 A JP 51515993A JP H07504311 A JPH07504311 A JP H07504311A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- maximum likelihood
- likelihood sequence
- synchronization
- synchronization point
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D11/001—Manufacture of flexible abrasive materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D11/001—Manufacture of flexible abrasive materials
- B24D11/005—Making abrasive webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
- B24D3/28—Resins or natural or synthetic macromolecular compounds
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
- H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
- H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/63—Joint error correction and other techniques
- H03M13/6331—Error control coding in combination with equalisation
-
- 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
-
- 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
- H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
- H04L2025/03535—Variable structures
- H04L2025/03547—Switching between time domain structures
-
- 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
- H04L25/03248—Arrangements for operating in conjunction with other apparatus
- H04L25/03292—Arrangements for operating in conjunction with other apparatus with channel estimation circuitry
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Probability & Statistics with Applications (AREA)
- Manufacturing & Machinery (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims (10)
- 1.最尤シーケンス推定装置であって:フラット・フェーディングのための第1 最尤シーケンス推定信号路; フラット・フェーディング以外のための第2最尤シーケンス推定信号路; 二乗平均誤差の大きさが最も小さい前記信号路を選択する手段; から成ることを特徴とする最尤シーケンス推定装置。
- 2.請求項1において、前記第1信号路は、更に、フラット・フェーディング用 フィルタ係数を有する同期点位置選定フィルタを含むことを特徴とする装置。
- 3.請求項1において、少なくとも第2信号路は、更に遅れ拡散検出フィルタを 含むことを特徴とする装置。
- 4.請求項3において、少なくとも第2信号路は、更に、同期点位置選定フィル タを含むことを特徴とする装置。
- 5.請求項4において、前記同期点位置選定フィルタの前記係数は、前記遅れ拡 散検出フィルタの出力に基づいて決定されることを特徴とする装置。
- 6.請求項1において、前記第1および第2最尤シーケンス推定信号路は、ビタ ビ・デコーダから成ることを特徴とする装置。
- 7.最尤シーケンス推定装置に同期および初期チャンネル推定を与える方法であ って: 入来するサンプル信号のサンプル・データ同期フィールドと、記憶されている同 期語との相関をとり、相関出力を生成するステップ; 複数の遅れ拡散感応フィルタを用いて、前記相関出力にフィルタ処理を行い、そ れぞれから複数の出力を生成するステップ; 前記複数の遅れ拡散感応フィルタの前記出力の相対強度に少なくとも部分的に基 づいて、同期点位置選定フィルタを選択するステップ;および 前記同期点位置選定フィルタを用いて前記相関出力のフィルタ処理に少なくとも 部分的に基づいて、同期点を決定するステップ; から成ることを特徴とする方法。
- 8.請求項7において、前記遅れ拡散感応フィルタは、遅れ拡散検出フィルタで あることを特徴とする方法。
- 9.請求項8において、前記遅れ拡散感応フィルタは、更に同期点位置選定フィ ルタを含むことを特徴とする方法。
- 10.請求項8において、前記複数の遅れ拡散感応フィルタの前記出力の相対強 度に少なくとも部分的に基づいて、同期点位置選定フィルタを選択する前記ステ ップは、更に、最大の相対強度を有する前記複数の遅れ拡散感応フィルタの出力 を判定するステップを含むことを特徴とする方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US998,063 | 1992-12-28 | ||
PCT/JP1993/000743 WO1994027787A1 (fr) | 1993-06-02 | 1993-06-02 | Bande abrasive et son procede de fabrication |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07504311A true JPH07504311A (ja) | 1995-05-11 |
JP2980682B2 JP2980682B2 (ja) | 1999-11-22 |
Family
ID=14070317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5515159A Expired - Lifetime JP2980682B2 (ja) | 1993-06-02 | 1993-06-02 | 研磨テープおよびその製造方法 |
Country Status (6)
Country | Link |
---|---|
US (3) | US5709598A (ja) |
EP (1) | EP0664187B1 (ja) |
JP (1) | JP2980682B2 (ja) |
KR (1) | KR0165625B1 (ja) |
DE (1) | DE69326774T2 (ja) |
WO (1) | WO1994027787A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003516096A (ja) * | 1999-12-01 | 2003-05-07 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | パイロットシンボルからのビット誤り率の推定 |
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-
1993
- 1993-06-02 EP EP93913473A patent/EP0664187B1/en not_active Expired - Lifetime
- 1993-06-02 DE DE69326774T patent/DE69326774T2/de not_active Expired - Lifetime
- 1993-06-02 US US08/379,459 patent/US5709598A/en not_active Expired - Lifetime
- 1993-06-02 JP JP5515159A patent/JP2980682B2/ja not_active Expired - Lifetime
- 1993-06-02 WO PCT/JP1993/000743 patent/WO1994027787A1/ja active IP Right Grant
- 1993-06-02 KR KR1019950700417A patent/KR0165625B1/ko not_active IP Right Cessation
-
1997
- 1997-08-14 US US08/911,053 patent/US5868806A/en not_active Expired - Lifetime
- 1997-10-03 US US08/943,180 patent/US5908476A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003516096A (ja) * | 1999-12-01 | 2003-05-07 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | パイロットシンボルからのビット誤り率の推定 |
JP4813723B2 (ja) * | 1999-12-01 | 2011-11-09 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | パイロットシンボルからのビット誤り率の推定 |
Also Published As
Publication number | Publication date |
---|---|
EP0664187A1 (en) | 1995-07-26 |
KR950702895A (ko) | 1995-08-23 |
JP2980682B2 (ja) | 1999-11-22 |
DE69326774T2 (de) | 2000-06-21 |
KR0165625B1 (ko) | 1999-02-01 |
US5709598A (en) | 1998-01-20 |
WO1994027787A1 (fr) | 1994-12-08 |
EP0664187A4 (en) | 1995-11-15 |
EP0664187B1 (en) | 1999-10-13 |
US5868806A (en) | 1999-02-09 |
DE69326774D1 (de) | 1999-11-18 |
US5908476A (en) | 1999-06-01 |
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