JP2008533762A - リミッタベースのアナログ復調器 - Google Patents
リミッタベースのアナログ復調器 Download PDFInfo
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- JP2008533762A JP2008533762A JP2007552261A JP2007552261A JP2008533762A JP 2008533762 A JP2008533762 A JP 2008533762A JP 2007552261 A JP2007552261 A JP 2007552261A JP 2007552261 A JP2007552261 A JP 2007552261A JP 2008533762 A JP2008533762 A JP 2008533762A
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- Prior art keywords
- phase
- signal
- receiving
- quadrature
- analog
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
- H04B1/0032—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage with analogue quadrature frequency conversion to and from the baseband
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
- H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
- H04L27/2331—Demodulator circuits; Receiver circuits using non-coherent demodulation wherein the received signal is demodulated using one or more delayed versions of itself
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Amplifiers (AREA)
Abstract
【選択図】 図4
Description
Claims (3)
- ベースバンド信号を受信する電力増幅器(32)と、
ベースバンド周波数で作動するローカルクロックと、
前記電力増幅器からの出力及び前記ローカルクロックを受け取り、同相信号を提供する第1の乗算器(34)と、
前記ローカルクロックを受け取る直交位相シフタ(36)と、
前記電力増幅器からの前記出力、及び、前記位相シフタからの出力を受け取り、直交信号を提供する第2の乗算器(38)と、
前記同相信号を受け取る第1のアナログフィルタ(40)と、
前記直交信号を受け取る第2のアナログフィルタ(42)と、
前記第1のアナログフィルタに接続されており、デジタル化された同相信号を提供する第1のアナログ−デジタル変換器(44)と、
前記第2のアナログフィルタに接続されており、デジタル化された直交信号を提供する第2のアナログ−デジタル変換器(46)と、
前記デジタル化された同相信号及び直交信号を受け取る位相検波手段(48)と、
を備えるリミッタベースのアナログ復調器。 - 前記位相検波手段が、
デジタルデータを受け取り、入力データを3倍のシンボルレートで提供する間引きフィルタ(52)と、
前記入力データを受け取る遅延バッファと、
前記入力データを受け取り、且つ、角度計算器、前記角度計算器に応答する平均値検波器、及び、前記角度計算器に応答するバースト検波器を組み込んでいるキャリア再生手段(54)と、
前記バースト検波器に応答してキャリアオフセットを計算し、オフセット角を提供する手段と、
前記遅延バッファからの入力データを受け、前記オフセット角に応答して前記入力データを回転させるローテータ(56)と、
前記ローテータからのデータをコヒーレント復調用に受け取る等化器(62)と、
を有する、請求項1に記載のリミッタベースの復調器。 - 前記位相検波手段が、
前記デジタル化された同相信号及び直交信号を受け取るハードウェアアクセラレータであって、
前記デジタル化された同相信号及び直交信号をフィルタリングし、3倍のシンボルレートに間引く(72,74)手段と、
前記フィルタリング及び間引きされた信号を受けて、スロットタイミング信号を生成するバースト同期(78)手段及びTDMA手段(80)と、
前記スロットタイミング信号に応答するストレージレジスタ(82)と、
を有する該ハードウェアアクセラレータと、
前記ストレージレジスタからの信号を受けるDSPプロセッサであって、
タイミングオフセットを推定するクロック再生手段(86)と、
前記タイミングオフセットに基づいて、タイミング調整、及び3対2のレート変換を実行する補間器手段(88)と、
前記同相信号及び直交信号を位相信号に変換するアークタンジェント手段(90)と、
を有する該DSPプロセッサと、
前記位相信号のキャリアオフセット調整を実行するキャリア再生手段(92)と、
前記位相信号の最終のデコードを実行するデコーダ手段(94)と、
を備える、請求項1に記載のリミッタベースの復調器。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US64584705P | 2005-01-20 | 2005-01-20 | |
US60/645,847 | 2005-01-20 | ||
PCT/US2006/001898 WO2006078818A2 (en) | 2005-01-20 | 2006-01-20 | Limiter based analog demodulator |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2008533762A true JP2008533762A (ja) | 2008-08-21 |
JP2008533762A5 JP2008533762A5 (ja) | 2009-04-23 |
JP4939437B2 JP4939437B2 (ja) | 2012-05-23 |
Family
ID=36692875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007552261A Expired - Fee Related JP4939437B2 (ja) | 2005-01-20 | 2006-01-20 | リミッタベースのアナログ復調器 |
Country Status (4)
Country | Link |
---|---|
US (2) | US7551694B2 (ja) |
JP (1) | JP4939437B2 (ja) |
CN (1) | CN101366252B (ja) |
WO (1) | WO2006078818A2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8932594B2 (en) | 2006-06-30 | 2015-01-13 | The Scripps Research Institute | Adjuvants and methods of use |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100758873B1 (ko) * | 2005-12-30 | 2007-09-19 | 포스데이타 주식회사 | 무선통신 시스템의 주파수 오프셋 추정 장치 및 방법 |
CN101232485B (zh) * | 2006-10-05 | 2013-01-09 | 马维尔国际贸易有限公司 | 通信系统、phs接收机和用于操作通信系统的方法 |
CN101232480B (zh) * | 2006-10-05 | 2012-09-05 | 马维尔国际贸易有限公司 | 用于调节频率偏移的装置和方法 |
RU209338U1 (ru) * | 2021-05-27 | 2022-03-15 | Ооо "Сигнал Сибирь" | Устройство для демодуляции ofdm-сигнала с децимацией частоты дискретизации |
Citations (4)
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JPH01256253A (ja) * | 1988-04-06 | 1989-10-12 | Nec Corp | データ復調方式 |
JPH09270827A (ja) * | 1996-04-01 | 1997-10-14 | Advantest Corp | デジタル直交変調信号のパラメータ測定装置 |
JP2000050341A (ja) * | 1998-07-15 | 2000-02-18 | Lucent Technol Inc | 通信方法 |
JP2003520549A (ja) * | 2000-01-18 | 2003-07-02 | ディトランス コーポレイション | 受信機帯域幅内の送信信号スペクトラムを打消す方法および装置 |
Family Cites Families (11)
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JP3148834B2 (ja) * | 1995-07-07 | 2001-03-26 | ノーテル・ネットワークス・リミテッド | ディジタル変調信号用キャリヤ再生方法および装置 |
JP3186692B2 (ja) * | 1998-04-15 | 2001-07-11 | 日本電気株式会社 | 復調器における位相推定方法 |
US7203718B1 (en) * | 1999-10-29 | 2007-04-10 | Pentomics, Inc. | Apparatus and method for angle rotation |
DE60128784T2 (de) * | 2001-02-26 | 2008-02-07 | Juniper Networks, Inc., Sunnyvale | Verfahren und Vorrichtung zur effizienten und genauen Grobzeitsynchronisierung in Pulsdemodulatoren |
US6868129B2 (en) * | 2001-03-12 | 2005-03-15 | Freescale Semiconductor, Inc. | Demodulator for a radio receiver and method of operation |
US6959057B1 (en) * | 2001-04-27 | 2005-10-25 | Rockwell Collins | Method of enhancing signal tracking in global positioning system receivers |
CN1235377C (zh) * | 2002-06-06 | 2006-01-04 | 华为技术有限公司 | 数字载波恢复装置 |
KR100469290B1 (ko) * | 2003-02-04 | 2005-02-02 | 엘지전자 주식회사 | 디지털 tv 수신기 |
US7280618B2 (en) * | 2003-06-25 | 2007-10-09 | Interdigital Technology Corporation | Digital baseband receiver including a high pass filter compensation module for suppressing group delay variation distortion incurred due to analog high pass filter deficiencies |
US20050185743A1 (en) * | 2004-01-14 | 2005-08-25 | Oki Techno Centre (Singapore) Pte Ltd | Apparatus for burst and timing synchronization in high-rate indoor wireless communication |
US7839923B2 (en) * | 2005-06-22 | 2010-11-23 | Marvell World Trade Ltd. | Method and system for equalizing received signals in communications systems |
-
2006
- 2006-01-19 US US11/307,015 patent/US7551694B2/en not_active Expired - Fee Related
- 2006-01-20 CN CN2006800027900A patent/CN101366252B/zh not_active Expired - Fee Related
- 2006-01-20 JP JP2007552261A patent/JP4939437B2/ja not_active Expired - Fee Related
- 2006-01-20 WO PCT/US2006/001898 patent/WO2006078818A2/en active Application Filing
-
2009
- 2009-06-22 US US12/488,825 patent/US7813452B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01256253A (ja) * | 1988-04-06 | 1989-10-12 | Nec Corp | データ復調方式 |
JPH09270827A (ja) * | 1996-04-01 | 1997-10-14 | Advantest Corp | デジタル直交変調信号のパラメータ測定装置 |
JP2000050341A (ja) * | 1998-07-15 | 2000-02-18 | Lucent Technol Inc | 通信方法 |
JP2003520549A (ja) * | 2000-01-18 | 2003-07-02 | ディトランス コーポレイション | 受信機帯域幅内の送信信号スペクトラムを打消す方法および装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8932594B2 (en) | 2006-06-30 | 2015-01-13 | The Scripps Research Institute | Adjuvants and methods of use |
Also Published As
Publication number | Publication date |
---|---|
CN101366252B (zh) | 2012-11-14 |
US7813452B2 (en) | 2010-10-12 |
US20070189420A1 (en) | 2007-08-16 |
CN101366252A (zh) | 2009-02-11 |
WO2006078818A3 (en) | 2008-09-12 |
JP4939437B2 (ja) | 2012-05-23 |
US20090268801A1 (en) | 2009-10-29 |
US7551694B2 (en) | 2009-06-23 |
WO2006078818A2 (en) | 2006-07-27 |
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