JP5114577B2 - 不連続送信検出法 - Google Patents
不連続送信検出法 Download PDFInfo
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- JP5114577B2 JP5114577B2 JP2011003660A JP2011003660A JP5114577B2 JP 5114577 B2 JP5114577 B2 JP 5114577B2 JP 2011003660 A JP2011003660 A JP 2011003660A JP 2011003660 A JP2011003660 A JP 2011003660A JP 5114577 B2 JP5114577 B2 JP 5114577B2
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- dtx
- channel estimator
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- symbol
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- 230000005540 biological transmission Effects 0.000 title claims description 18
- 238000001514 detection method Methods 0.000 title description 25
- 238000000034 method Methods 0.000 claims description 47
- 238000010606 normalization Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000003786 synthesis reaction Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 description 22
- 238000004891 communication Methods 0.000 description 12
- 239000002243 precursor Substances 0.000 description 7
- 230000008034 disappearance Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70707—Efficiency-related aspects
- H04B2201/70709—Efficiency-related aspects with discontinuous detection
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Error Detection And Correction (AREA)
- Mobile Radio Communication Systems (AREA)
Description
式1および式2は、数学的には等価ではないが、チャネル状態にかかわらずDTXについての距離をほぼ一定にすることによって、消失とDTXとを正確に区別する距離を生成する時に同様な性能を示す。式2は、平方根の操作を必要とせず、計算するのが式1より容易である。
102 複数のセル
104 基地局
106 移動デバイス
Claims (8)
- チェックサム・エラーに関連する送信されたフレームが不連続送信によって引き起こされているかどうかを判定する方法であって、
前記送信されたフレームに対応するソフト・シンボルを合成してエネルギー項を得る工程を含み、前記合成は、前記ソフト・シンボルの平方を合計することによる前記エネルギー項の決定を含み、さらに、
前記エネルギー項を正規化して距離を得る工程とを含み、前記正規化は、前記エネルギー項に対するチャネル状態の影響を除去するものであり、さらに、
前記距離をしきい値と比較して、不連続送信または消失が起こったかどうかを判定する工程を含む、方法。 - 前記正規化は、前記エネルギー項を正規化係数で割ることを含む、請求項1に記載の方法。
- 前記正規化係数はフィンガを合成したチャネル推定量ノルムの合計に等しい、請求項2に記載の方法。
- 前記ソフト・シンボルが複数のフィンガを介して受信され、前記複数のフィンガの各々は関連するフィンガ・チャネル推定量を有し、前記フィンガを合成したチャネル推定量ノルムの各々は、前記ソフト・シンボルを生成するのに用いるフィンガ・チャネル推定量ノルムの平方の合計の平方根を含む、請求項3に記載の方法。
- 前記正規化は、前記エネルギー項を正規化係数で割ることを含む、請求項1に記載の方法。
- 前記正規化係数はフィンガを合成したチャネル推定量ノルムの平方の合計に等しい、請求項5に記載の方法。
- 前記ソフト・シンボルは複数のフィンガを介して受信され、前記複数のフィンガの各々は関連するフィンガ・チャネル推定量を有し、前記フィンガを合成したチャネル推定量ノルムの各々は、前記ソフト・シンボルを生成するのに用いるフィンガ・チャネル推定量ノルムの平方の合計の平方根を含む、請求項6に記載の方法。
- チェックサム・エラーに関連する送信されたフレームが不連続送信によって引き起こされているかどうかを判定する方法であって、
ソフト・シンボルの平方であるソフトシンボル値を合計することによる一定比率の合成によって、前記送信されたフレームに対応する前記ソフト・シンボルを合成して距離を得る工程を含み、前記ソフト・シンボルの合成は、前記距離に対するチャネル状態の影響を除去する正規化されたチャネル推定量を用いて行われ、さらに、
前記距離をしきい値と比較して、不連続送信または消失が起こったかどうかを判定する工程を含む、方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/446,994 US20040240529A1 (en) | 2003-05-28 | 2003-05-28 | Discontinuous transmission detection method |
US10/446994 | 2003-05-28 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004158475A Division JP5062944B2 (ja) | 2003-05-28 | 2004-05-28 | 不連続送信検出法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2011097634A JP2011097634A (ja) | 2011-05-12 |
JP5114577B2 true JP5114577B2 (ja) | 2013-01-09 |
Family
ID=33451141
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004158475A Expired - Fee Related JP5062944B2 (ja) | 2003-05-28 | 2004-05-28 | 不連続送信検出法 |
JP2011003660A Expired - Fee Related JP5114577B2 (ja) | 2003-05-28 | 2011-01-12 | 不連続送信検出法 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004158475A Expired - Fee Related JP5062944B2 (ja) | 2003-05-28 | 2004-05-28 | 不連続送信検出法 |
Country Status (2)
Country | Link |
---|---|
US (1) | US20040240529A1 (ja) |
JP (2) | JP5062944B2 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7080295B2 (en) * | 2002-11-01 | 2006-07-18 | Broadcom Corporation | Methods and systems for detecting symbol erasures |
WO2006080904A1 (en) * | 2005-01-14 | 2006-08-03 | Thomson Licensing | Method and system for sub-chip resolution for secondary cell search |
JP2008527910A (ja) * | 2005-01-14 | 2008-07-24 | トムソン ライセンシング | Cdmaシステム用の効率的な最大比合成器 |
WO2006078234A1 (en) * | 2005-01-14 | 2006-07-27 | Thomson Licensing | Cell search using rake searcher to perform scrambling code determination |
EP1836776A1 (en) * | 2005-01-14 | 2007-09-26 | Thomson Licensing | Ram-based scrambling code generator for cdma |
US7483386B2 (en) * | 2005-03-31 | 2009-01-27 | Alcatel-Lucent Usa Inc. | Adaptive threshold setting for discontinuous transmission detection |
US8086257B2 (en) * | 2005-08-11 | 2011-12-27 | Alcatel Lucent | Dedicated control channel detection for enhanced dedicated channel |
US7782820B2 (en) * | 2006-09-26 | 2010-08-24 | Alcatel-Lucent Usa Inc. | Method of detecting discontinuous transmission (DTX) and method of generating a signal metric for use in DTX detection |
US7921351B2 (en) * | 2006-12-22 | 2011-04-05 | Cable Television Labs, Inc. | Increasing error correction in data streams encoded with linear block code |
US9414431B2 (en) | 2014-02-14 | 2016-08-09 | Freescale Semiconductor, Inc. | Method of discontinuous transmission detection |
US9480103B2 (en) | 2014-02-14 | 2016-10-25 | Freescale Semiconductor, Inc. | Method of DTX detection in a wireless communication system |
US10102602B2 (en) * | 2015-11-24 | 2018-10-16 | The Nielsen Company (Us), Llc | Detecting watermark modifications |
CN114258060B (zh) * | 2020-09-24 | 2023-10-20 | 大唐移动通信设备有限公司 | Dtx检测方法、装置及处理器可读存储介质 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6504827B1 (en) * | 1998-12-18 | 2003-01-07 | Lucent Technologies Inc. | Discontinuous transmission on high speed data channels |
US6501788B1 (en) * | 1999-01-22 | 2002-12-31 | Ericsson Inc. | Apparatus and methods for intereference cancellation in spread spectrum communications systems |
US7143178B2 (en) * | 2000-06-29 | 2006-11-28 | Qualcomm Incorporated | System and method for DTX frame detection |
US6856644B1 (en) * | 2000-10-31 | 2005-02-15 | Motorola, Inc. | Method and apparatus for forward link power control bit generation in a spread-spectrum communication system |
US6400960B1 (en) * | 2001-07-13 | 2002-06-04 | Lucent Technologies Inc. | Power control of a communication traffic channel with discontinued transmission in the presence of a primary traffic channel |
US7180881B2 (en) * | 2001-09-28 | 2007-02-20 | Interdigital Technology Corporation | Burst detector |
JP2003134092A (ja) * | 2001-10-22 | 2003-05-09 | Toshiba Corp | 通信システム、送信装置、受信装置、誤り検出符号化回路および誤り検出回路 |
CN1586048B (zh) * | 2001-11-16 | 2012-07-11 | 皇家飞利浦电子股份有限公司 | 无线通信系统 |
US7437172B2 (en) * | 2002-12-10 | 2008-10-14 | Qualcomm Incorporated | Discontinuous transmission (DTX) detection in wireless communication systems |
-
2003
- 2003-05-28 US US10/446,994 patent/US20040240529A1/en not_active Abandoned
-
2004
- 2004-05-28 JP JP2004158475A patent/JP5062944B2/ja not_active Expired - Fee Related
-
2011
- 2011-01-12 JP JP2011003660A patent/JP5114577B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP5062944B2 (ja) | 2012-10-31 |
US20040240529A1 (en) | 2004-12-02 |
JP2004357303A (ja) | 2004-12-16 |
JP2011097634A (ja) | 2011-05-12 |
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