JPH10500810A - 振幅変調にコンパチブルなデジタル放送を行うための方法及び装置 - Google Patents
振幅変調にコンパチブルなデジタル放送を行うための方法及び装置Info
- Publication number
- JPH10500810A JPH10500810A JP7523495A JP52349595A JPH10500810A JP H10500810 A JPH10500810 A JP H10500810A JP 7523495 A JP7523495 A JP 7523495A JP 52349595 A JP52349595 A JP 52349595A JP H10500810 A JPH10500810 A JP H10500810A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- carrier
- modulated
- amplitude
- frequency
- 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
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
- H04H20/36—Arrangements for simultaneous broadcast of plural pieces of information for AM broadcasts
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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
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/02—Channels characterised by the type of signal
- H04L5/023—Multiplexing of multicarrier modulation signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
- H04H2201/18—Aspects of broadcast communication characterised by the type of broadcast system in band on channel [IBOC]
- H04H2201/186—AM digital or hybrid
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/26035—Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Transmitters (AREA)
- Circuits Of Receivers In General (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Amplitude Modulation (AREA)
- Alarm Systems (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.アナログ信号により振幅変調された第1のキャリアを含む、第1の周波数 スペクトルを有する第1の無線周波数信号を放送し、 それと同時に、第1の信号の周波数スペクトルを包含する周波数レンジ内にお いて各々がデジタル信号の一部によりデジタル変調された複数のデジタル変調キ ャリア信号を放送するステップより成り、 前記デジタル変調キャリア信号のうちの第1の群は前記第1の周波数スペクト ルとオーバーラップし且つ前記第1のキャリア信号と直角位相で変調され、 また前記デジタル変調キャリア信号の第2及び第3の群は前記第1の周波数ス ペクトルの外側にあって前記第1のキャリア信号と同相及び直角位相の両方で変 調されることを特徴とする無線周波数放送方式。 2.前記デジタル変調キャリア信号の周波数間隔は割当てられたチャンネルの 間隔の約数に等しいことを特徴とする請求項1の無線周波数放送方式。 3.隣接チャンネルの中心に位置するデジタル変調キャリア信号の位置ではエ ネルギーが送られないことを特徴とする請求項1の無線周波数放送方式。 4.前記第1の群のデジタル変調キャリア信号の振幅は、未変調の第1キャリ ア信号の振幅より小さいことを特徴とする請求項1の無線周波数放送方式。 5.前記第2及び第3の群のデジタル変調キャリア信号の振幅は、未変調の第 1キャリア信号の振幅より小さいことを特徴とする請求項4の無線周波数放送方 式。 6.前記第1キャリア信号の周波数に最も近い所定のデジタル変調キャリア信 号はBPSKフォーマットで変調されることを特徴とする請求項1の無線周波数 放送方式。 7.前記所定のデジタル変調キャリア信号は他のデジタルキャリア信号のため の基準レベルとして働くことを特徴とする請求項6の無線周波数放送方式。 8.前記アナログ信号及びデジタル信号は同一プログラム材の異なる表示であ ることを特徴とする請求項1の無線周波数放送方式。 9.前記第2及び第3の群のデジタル変調キャリア信号は32 QAMフォー マットで変調されることを特徴とする請求項1の無線周波数放送方式。 10.前記デジタル変調キャリア信号は40kHzの帯域幅を占有する第2の 周波数スペクトル内にあることを特徴とする請求項1の無線周波数放送方式。 11.前記デジタル変調キャリア信号は等しい周波数間隔を有することを特徴 とする請求項1の無線周波数放送方式。 12.前記デジタル変調キャリア信号の周波数間隔は割当てられたチャンネル の間隔の約数に等しいことを特徴とする請求項11の無線周波数放送方式。 13.第1の周波数帯域において振幅変調信号を提供し、 前記第1の周波数帯域において第1の群の直交直角振幅変調されたキャリアを 提供し、 前記第1の周波数帯域に包含される周波数の上方及び下方の周波数をそれぞれ 包含する第2及び第3の周波数帯域において第2及び第3の群の直交振幅変調さ れたキャリアを提供するステップより成ることを特徴とする電気信号を変調する 方法。 14.前記直交直角変調キャリアの振幅は前記振幅変調信号の未変調振幅より 小さいことを特徴とする請求項13の電気信号変調方法。 15.前記第2及び第3の群の前記直交変調キャリアの振幅は前記振幅変調信 号の未変調振幅より小さいことを特徴とする請求項13の電気信号変調方法。 16.アナログ信号により振幅変調された第1のキャリアを含む、第1の周波 数スペクトルを有する信号を送信し、 それと同時に、第1の信号の周波数スペクトルを包含する周波数レンジ内にお いて各々がデジタル信号の一部によりデジタル変調された複数のデジタル変調キ ャリア信号を送信するステップより成り、 前記デジタル変調キャリア信号のうちの第1の群は前記第1の周波数スペクト ルとオーバーラップし且つ前記第1のキャリア信号と直角位相で変調され、 また前記デジタル変調キャリア信号の第2及び第3の群は前記第1の周波数ス ペクトルの外側にあって前記第1のキャリア信号と同相及び直角位相の両方で変 調されることを特徴とする信号送信方式。 17.前記第1の群のデジタル変調キャリア信号の振幅は未変調の第1のキャ リア信号の振幅より小さいことを特徴とする請求項16の信号送信方式。 18.前記第2及び第3の群のデジタル変調キャリア信号の振幅は未変調の第 1のキャリア信号の振幅より小さいことを特徴とする請求項17の信号送信方式 。 19.前記アナログ信号及びデジタル信号は同一の情報の異なる表示であるこ とを特徴とする請求項16の信号送信方式。 20.前記第2及び第3の群のキャリア信号は32 QAMフォーマットで変 調されることを特徴とする請求項16の信号送信方式。 21.前記デジタル変調キャリア信号は等しい周波数間隔を有することを特徴 とする請求項16の信号送信方式。 22.アナログ信号により振幅変調される第1のキャリアを有する第1の信号 と、第1の信号の周波数スペクトルを包含する周波数レンジ内の、各々がデジタ ル信号の一部によりデジタル変調された複数のデジタル変調キャリア信号とを含 む複合無線周波数波形を同時に送信する手段より成り、第1の群のデジタル変調 キャリア信号は第1の信号の周波数スペクトルとオーバーラップして前記第1の キャリア信号と直角位相で変調され、また第2及び第3の群のデジタル変調キャ リア信号は前記第1の信号の周波数スペクトルの外側にあって前記第1のキャリ ア信号と同相及び直角位相の両方で変調されることを特徴とする無線周波数送信 機。 23.アナログ信号により振幅変調される第1のキャリアを有する第1の信号 と、第1の信号の周波数スペクトルを包含する周波数レンジ内の、各々がデジタ ル信号の一部によりデジタル変調された複数のデジタル変調キャリア信号とを含 む複合無線周波数波形のアナログ部分及びデジタル部分を共に受信する手段を含 み、第1の群のデジタル変調キャリア信号は第1の信号の周波数スペクトルとオ ーバーラップして前記第1のキャリア信号と直角位相で変調され、また第2及び 第3の群のデジタル変調キャリア信号は前記第1の信号の周波数スペクトルの外 側にあって前記第1のキャリア信号と同相及び直角位相の両方で変調され、さら に前記第1の振幅変調キャリア上のアナログ信号を検波する手段と、前記デジタ ル変調キャリア上のデジタル信号を検波する手段とを含むことを特徴とする無線 周波数受信機。 24.前記デジタル信号を検波する前記手段は前記第1のキャリア信号の位相 を位相基準として用いて前記デジタル変調キャリアを復調することを特徴とする 請求項23の無線周波数受信機。 25.前記アナログ信号を検波する前記手段の同相チャンネルから前記アナロ グ信号を抽出するフィルタをさらに含むことを特徴とする請求項23の無線周波 数受信機。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/206,368 | 1994-03-07 | ||
US08/206,368 US5588022A (en) | 1994-03-07 | 1994-03-07 | Method and apparatus for AM compatible digital broadcasting |
PCT/US1995/002408 WO1995024781A1 (en) | 1994-03-07 | 1995-02-27 | Method and apparatus for am compatible digital broadcasting |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007295825A Division JP4269014B2 (ja) | 1994-03-07 | 2007-11-14 | 振幅変調にコンパチブルなデジタル放送を行うための方法及び装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10500810A true JPH10500810A (ja) | 1998-01-20 |
JP4269003B2 JP4269003B2 (ja) | 2009-05-27 |
Family
ID=22766069
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52349595A Expired - Lifetime JP4269003B2 (ja) | 1994-03-07 | 1995-02-27 | 振幅変調にコンパチブルなデジタル放送用受信機 |
JP2007295825A Expired - Lifetime JP4269014B2 (ja) | 1994-03-07 | 2007-11-14 | 振幅変調にコンパチブルなデジタル放送を行うための方法及び装置 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007295825A Expired - Lifetime JP4269014B2 (ja) | 1994-03-07 | 2007-11-14 | 振幅変調にコンパチブルなデジタル放送を行うための方法及び装置 |
Country Status (15)
Country | Link |
---|---|
US (1) | US5588022A (ja) |
EP (1) | EP0749650B1 (ja) |
JP (2) | JP4269003B2 (ja) |
KR (1) | KR100342286B1 (ja) |
CN (2) | CN1143463C (ja) |
AT (1) | ATE201540T1 (ja) |
AU (1) | AU687198B2 (ja) |
BR (1) | BR9507009A (ja) |
CA (1) | CA2185003C (ja) |
DE (1) | DE69521033T2 (ja) |
MX (1) | MX9603971A (ja) |
NZ (1) | NZ300094A (ja) |
RU (1) | RU2140708C1 (ja) |
TW (1) | TW256972B (ja) |
WO (1) | WO1995024781A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002512493A (ja) * | 1998-04-17 | 2002-04-23 | エンカメラ サイエンシィーズ コーポレーション | 既存の通信システムのための拡大された情報容量 |
JP2003502939A (ja) * | 1999-06-24 | 2003-01-21 | アイビキュイティ・デジタル・コーポレイション | デジタル音声放送信号の伝送モード及び同期を突き止める方法及び装置 |
JP2005244957A (ja) * | 2004-01-26 | 2005-09-08 | Ibiquity Digital Corp | ハイブリッドamインバンドオンチャンネルデジタル音声放送方式のためのフォワード誤り訂正符号化方式 |
Families Citing this family (83)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5465396A (en) | 1993-01-12 | 1995-11-07 | Usa Digital Radio Partners, L.P. | In-band on-channel digital broadcasting |
IL114471A0 (en) * | 1994-07-12 | 1996-01-31 | Usa Digital Radio Partners L P | Method and system for simultaneously broadcasting and analog signals |
US5956624A (en) | 1994-07-12 | 1999-09-21 | Usa Digital Radio Partners Lp | Method and system for simultaneously broadcasting and receiving digital and analog signals |
US6334219B1 (en) | 1994-09-26 | 2001-12-25 | Adc Telecommunications Inc. | Channel selection for a hybrid fiber coax network |
US5631958A (en) * | 1994-10-04 | 1997-05-20 | Coherent Communications Systems Corp. | Automatic echo cancellation for an integrated services digital network interface |
DE19535075A1 (de) * | 1994-10-21 | 1996-04-25 | Deutsche Telekom Ag | Digitalmodulation |
EP0746909B1 (en) * | 1994-12-23 | 2001-12-05 | Koninklijke Philips Electronics N.V. | De-interleaving and buffering in one memory |
US5668820A (en) * | 1995-01-23 | 1997-09-16 | Ericsson Inc. | Digital communication system having a punctured convolutional coding system and method |
USRE42236E1 (en) | 1995-02-06 | 2011-03-22 | Adc Telecommunications, Inc. | Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing |
US7280564B1 (en) | 1995-02-06 | 2007-10-09 | Adc Telecommunications, Inc. | Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing |
US5764706A (en) * | 1995-08-31 | 1998-06-09 | Usa Digital Radio Partners, L.P. | AM compatible digital waveform frame timing recovery and frame synchronous power measurement |
US5956373A (en) * | 1995-11-17 | 1999-09-21 | Usa Digital Radio Partners, L.P. | AM compatible digital audio broadcasting signal transmision using digitally modulated orthogonal noise-like sequences |
US5687191A (en) * | 1995-12-06 | 1997-11-11 | Solana Technology Development Corporation | Post-compression hidden data transport |
JPH09270765A (ja) * | 1996-01-31 | 1997-10-14 | Victor Co Of Japan Ltd | Ofdm変復調装置及びofdm変調方法 |
US5898732A (en) * | 1996-02-20 | 1999-04-27 | Usa Digital Radio Partners, L.P. | Data service channel provision for an AM compatible broadcast system |
US5901178A (en) * | 1996-02-26 | 1999-05-04 | Solana Technology Development Corporation | Post-compression hidden data transport for video |
JP3118419B2 (ja) * | 1996-06-07 | 2000-12-18 | 株式会社ケンウッド | Amデータ多重変調装置 |
US5949796A (en) | 1996-06-19 | 1999-09-07 | Kumar; Derek D. | In-band on-channel digital broadcasting method and system |
US6144705A (en) * | 1996-08-22 | 2000-11-07 | Lucent Technologies Inc. | Technique for simultaneous communications of analog frequency-modulated and digitally modulated signals using precanceling scheme |
US5896421A (en) * | 1996-09-25 | 1999-04-20 | Hughes Electronics Corporation | Use of low pass filter and equalizer for noise reduction in direct up-conversion schemes |
US5930687A (en) * | 1996-09-30 | 1999-07-27 | Usa Digital Radio Partners, L.P. | Apparatus and method for generating an AM-compatible digital broadcast waveform |
US6359938B1 (en) * | 1996-10-31 | 2002-03-19 | Discovision Associates | Single chip VLSI implementation of a digital receiver employing orthogonal frequency division multiplexing |
FR2756686B1 (fr) * | 1996-11-29 | 1999-02-19 | Thomson Csf | Procede et dispositif de radiodiffusion mixte analogique et numerique d'emission radiophonique diffusee par un meme emetteur |
US5894497A (en) * | 1996-12-20 | 1999-04-13 | Airnet Communications Corp. | Reducing spurious modulation products in broadband multicarrier transmission by coherrent summation of the outputs of dissimilar digital-to analog device types |
FR2757725B1 (fr) * | 1996-12-20 | 2001-10-05 | Thomson Csf | Procede hierarchique de transmission et de radiodiffusion numerique d'emission radiophoniques |
TW465234B (en) | 1997-02-18 | 2001-11-21 | Discovision Ass | Single chip VLSI implementation of a digital receiver employing orthogonal frequency division multiplexing |
US6128334A (en) * | 1997-02-21 | 2000-10-03 | Usa Digital Radio, Inc. | Receiver addressable AM compatible digital broadcast system |
JPH10247855A (ja) * | 1997-03-04 | 1998-09-14 | Sony Corp | 放送信号受信装置 |
US6075813A (en) * | 1997-03-18 | 2000-06-13 | Lucent Technologies Inc. | Band insertion and precancellation technique for simultaneous communication of analog frequency modulated and digitally modulated signals |
US6005894A (en) * | 1997-04-04 | 1999-12-21 | Kumar; Derek D. | AM-compatible digital broadcasting method and system |
DE19717169A1 (de) * | 1997-04-23 | 1998-10-29 | Deutsche Telekom Ag | Verfahren und Anordnung für eine analog-digitale Simultanübertragung von Rundfunksendungen in den AM-Frequenzbändern |
JPH1117760A (ja) * | 1997-06-24 | 1999-01-22 | Sony Corp | 受信装置及び送受信装置並びに通信方法 |
US5907582A (en) * | 1997-08-11 | 1999-05-25 | Orbital Sciences Corporation | System for turbo-coded satellite digital audio broadcasting |
US6108810A (en) * | 1998-03-27 | 2000-08-22 | Usa Digital Radio, Inc. | Digital audio broadcasting method using puncturable convolutional code |
US6430227B1 (en) * | 1998-03-27 | 2002-08-06 | Ibiquity Digital Corporation | FM in-band-on-channel digital audio broadcasting method and system |
US6243424B1 (en) | 1998-03-27 | 2001-06-05 | Ibiguity Digital Corporation | Method and apparatus for AM digital broadcasting |
US6148007A (en) * | 1998-03-27 | 2000-11-14 | Usa Digital Radio Partners, L.P. | Method for data transmission in a digital audio broadcasting system |
US6445750B1 (en) * | 1998-04-22 | 2002-09-03 | Lucent Technologies Inc. | Technique for communicating digitally modulated signals over an amplitude-modulation frequency band |
JP3912459B2 (ja) * | 1998-06-16 | 2007-05-09 | ソニー株式会社 | 受信機 |
US6452977B1 (en) * | 1998-09-15 | 2002-09-17 | Ibiquity Digital Corporation | Method and apparatus for AM compatible digital broadcasting |
US6317470B1 (en) | 1998-09-15 | 2001-11-13 | Ibiquity Digital Corporation | Adaptive weighting method for orthogonal frequency division multiplexed soft symbols using channel state information estimates |
US6292511B1 (en) * | 1998-10-02 | 2001-09-18 | Usa Digital Radio Partners, Lp | Method for equalization of complementary carriers in an AM compatible digital audio broadcast system |
US6295317B1 (en) * | 1998-10-02 | 2001-09-25 | Usa Digital Radio Partners, Lp | Method and apparatus for demodulating and equalizing an AM compatible digital audio broadcast signal |
US6404408B1 (en) * | 1999-01-07 | 2002-06-11 | Surfer Network.Com, Inc. | Enhanced radio graphic data system |
US6590944B1 (en) | 1999-02-24 | 2003-07-08 | Ibiquity Digital Corporation | Audio blend method and apparatus for AM and FM in band on channel digital audio broadcasting |
US6567474B1 (en) * | 1999-03-02 | 2003-05-20 | Phonex Corporation | Digital wireless phone/modem jack capable of communications over the power lines using differential binary phase shift keying (DBPSK) |
US6532258B1 (en) | 1999-06-24 | 2003-03-11 | Ibiquity Digital Corporation | Method for estimating signal-to-noise ratio of digital carriers in an AM compatible digital audio broadcasting system |
US6400758B1 (en) | 1999-06-24 | 2002-06-04 | Ibiquity Digital Corporation | Method and apparatus for training sequence identification in an AM compatible digital audio broadcasting system |
DE19932062A1 (de) * | 1999-07-12 | 2001-01-18 | Bosch Gmbh Robert | Verfahren zur Aufbereitung von quellcodierten Audiodaten sowie Sender und Empfänger hierzu |
US6721337B1 (en) | 1999-08-24 | 2004-04-13 | Ibiquity Digital Corporation | Method and apparatus for transmission and reception of compressed audio frames with prioritized messages for digital audio broadcasting |
US6879640B1 (en) * | 1999-10-20 | 2005-04-12 | Broadcom Corporation | Method, apparatus and system for high-speed transmission on fiber optic channel |
US7095793B2 (en) * | 2000-01-07 | 2006-08-22 | Mario Hieb | Digital exciter/phasor/transmitter for directional antennal system |
US20020009125A1 (en) * | 2000-06-12 | 2002-01-24 | Shi Zhen Liang | High bandwidth efficient spread spectrum modulation using chirp waveform |
DE10131849A1 (de) | 2001-06-27 | 2003-01-16 | Deutsche Telekom Ag | Verfahren zur Vermeidung von Störausstrahlungen bei AM-Sendern für digitale Übertragung |
EP1276257B1 (en) * | 2001-07-11 | 2003-06-04 | Sony International (Europe) GmbH | DRM/AM simulcast |
US20030191151A1 (en) * | 2001-10-26 | 2003-10-09 | Imtiaz Chaudry | Albuterol and ipratropium inhalation solution, system, kit and method for relieving symptoms of chronic obstructive pulmonary disease |
US6798849B2 (en) | 2001-12-10 | 2004-09-28 | Ibiquity Digital Corporation | AM digital audio broadcasting with analog signal pre-compensation |
US6639949B2 (en) | 2001-12-17 | 2003-10-28 | Ibiquity Digital Corporation | Method and apparatus for pulse overlap pre-compensation in digitally modulated signals |
US7043681B2 (en) | 2002-05-03 | 2006-05-09 | Ibiquity Digital Corporation | Digital audio broadcasting method and apparatus using complementary pattern-mapped convolutional codes |
EP1370017A1 (en) * | 2002-06-07 | 2003-12-10 | Sony International (Europe) GmbH | Interference reduction for simulcast signals |
TWI320274B (en) * | 2002-09-27 | 2010-02-01 | Method and apparatus for digital audio broadcasting | |
US7551675B2 (en) * | 2002-09-27 | 2009-06-23 | Ibiquity Digital Corporation | Method and apparatus for synchronized transmission and reception of data in a digital audio broadcasting system |
US7305043B2 (en) * | 2002-10-17 | 2007-12-04 | Ibiquity Digital Corporation | Method and apparatus for formatting signals for digital audio broadcasting transmission and reception |
US6898249B2 (en) * | 2002-12-17 | 2005-05-24 | Ibiquity Digital Corporation | Method and apparatus for AM digital audio broadcasting with amplitude scaled tertiary subcarriers |
WO2004075460A2 (en) * | 2003-02-14 | 2004-09-02 | Focus Enhancements, Inc. | Method and apparatus for frequency division multiplexing |
US7127008B2 (en) | 2003-02-24 | 2006-10-24 | Ibiquity Digital Corporation | Coherent AM demodulator using a weighted LSB/USB sum for interference mitigation |
US7460684B2 (en) | 2003-06-13 | 2008-12-02 | Nielsen Media Research, Inc. | Method and apparatus for embedding watermarks |
US7680201B2 (en) * | 2004-01-26 | 2010-03-16 | Ibiquity Digital Corporation | Forward error correction coding for AM 9kHz and 10kHz in-band on-channel digital audio broadcasting systems |
CN100380821C (zh) * | 2004-02-12 | 2008-04-09 | 北京新岸线移动多媒体技术有限公司 | 向下兼容的调幅广播数字化传输方法 |
DE102004032286A1 (de) * | 2004-07-02 | 2006-01-19 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Übertragung von Zusatzdaten in einem analogen Rundfunkübertragungssystem |
AU2005270105B2 (en) | 2004-07-02 | 2011-03-31 | Nielsen Media Research, Inc. | Methods and apparatus for mixing compressed digital bit streams |
US7233777B2 (en) * | 2004-08-31 | 2007-06-19 | L-3 Integrated Systems Company | Separation of AM cochannel signals in an overloaded signal environment |
US7426378B2 (en) * | 2005-04-05 | 2008-09-16 | L-3 Communications Integrated Systems, L.P. | Separation of cochannel FM signals |
US7733983B2 (en) * | 2005-11-14 | 2010-06-08 | Ibiquity Digital Corporation | Symbol tracking for AM in-band on-channel radio receivers |
US7697620B2 (en) | 2005-11-14 | 2010-04-13 | Ibiquity Digital Corporation | Equalizer for AM in-band on-channel radio receivers |
US8306476B2 (en) * | 2007-07-18 | 2012-11-06 | Griffin Technology, Inc. | Digital controller and transmitter for portable electronic device |
US7623833B2 (en) * | 2006-04-13 | 2009-11-24 | Harris Corporation | Dual output digital exciter |
WO2008045950A2 (en) | 2006-10-11 | 2008-04-17 | Nielsen Media Research, Inc. | Methods and apparatus for embedding codes in compressed audio data streams |
RU2505925C2 (ru) * | 2012-01-17 | 2014-01-27 | Игорь Владимирович Заикин | Способ одновременного излучения аналогового и цифрового сигнала вч от одного передатчика |
US8595590B1 (en) | 2012-12-03 | 2013-11-26 | Digital PowerRadio, LLC | Systems and methods for encoding and decoding of check-irregular non-systematic IRA codes |
US8948272B2 (en) | 2012-12-03 | 2015-02-03 | Digital PowerRadio, LLC | Joint source-channel decoding with source sequence augmentation |
US9191256B2 (en) | 2012-12-03 | 2015-11-17 | Digital PowerRadio, LLC | Systems and methods for advanced iterative decoding and channel estimation of concatenated coding systems |
CN110441741A (zh) * | 2019-07-11 | 2019-11-12 | 纳瓦电子(上海)有限公司 | 一种实现正交幅度调制的方法 |
Family Cites Families (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3845391A (en) * | 1969-07-08 | 1974-10-29 | Audicom Corp | Communication including submerged identification signal |
US3919479A (en) * | 1972-09-21 | 1975-11-11 | First National Bank Of Boston | Broadcast signal identification system |
US3885217A (en) * | 1973-07-11 | 1975-05-20 | Computer Specifics Corp | Data transmission system |
US3919640A (en) * | 1974-11-08 | 1975-11-11 | Northern Illinois Gas Co | Simultaneous analog and digital data transfer |
US4051438A (en) * | 1975-09-11 | 1977-09-27 | International Telephone And Telegraph Corporation | Co-channel multiple signal broadcasting system |
FR2464601B1 (fr) * | 1979-08-29 | 1986-10-24 | Trt Telecom Radio Electr | Systeme de radiodiffusion numerique de plusieurs signaux d'information par un reseau d'emetteurs utilisant sensiblement la meme frequence porteuse |
DE3121146A1 (de) * | 1981-05-27 | 1983-01-05 | Siemens AG, 1000 Berlin und 8000 München | Digitales funksystem |
US4399558A (en) * | 1981-06-29 | 1983-08-16 | Rca Corporation | Cascaded digital broadcast transmitter |
US4425642A (en) * | 1982-01-08 | 1984-01-10 | Applied Spectrum Technologies, Inc. | Simultaneous transmission of two information signals within a band-limited communications channel |
FR2539261B1 (fr) * | 1983-01-07 | 1989-07-13 | Telecommunications Sa | Emetteur pour faisceaux hertziens numeriques a multi-etats |
US4665427A (en) * | 1983-03-14 | 1987-05-12 | U.S. Philips Corporation | Method and apparatus for converting C-MAC television signals for transmission over a limited bandwidth medium |
US4881245A (en) * | 1983-07-01 | 1989-11-14 | Harris Corporation | Improved signalling method and apparatus |
AU589119B2 (en) * | 1984-04-17 | 1989-10-05 | Nec Corporation | Digital radio communication system utilizing quadrature modulated carrier waves |
AU4402185A (en) * | 1984-05-29 | 1985-12-31 | Mesh Data Ltd. | Data transmission method and apparatus |
US4615040A (en) * | 1984-06-14 | 1986-09-30 | Coenco Ltd. | High speed data communications system |
US4660192A (en) * | 1985-04-11 | 1987-04-21 | Pomatto Sr Robert P | Simultaneous AM and FM transmitter and receiver |
US5128933A (en) * | 1985-07-29 | 1992-07-07 | Baranoff Rossine Dimitri | Process and device for the radio transmission of coded data superimposed on a traditional frequency-modulated broadcast |
US4882725A (en) * | 1987-01-30 | 1989-11-21 | Hitachi, Ltd. | Multiplex transmission method and apparatus |
US4881241A (en) * | 1988-02-24 | 1989-11-14 | Centre National D'etudes Des Telecommunications | Method and installation for digital communication, particularly between and toward moving vehicles |
FI83005C (fi) * | 1988-08-19 | 1991-05-10 | Nokia Mobira Oy | Kretsanordning foer generering av i,q-vaogformer. |
US5006926A (en) * | 1988-10-03 | 1991-04-09 | North American Philips Corporation | High definition multiple analog component amplitude modulated television transmission system |
US5134630A (en) * | 1989-04-12 | 1992-07-28 | National Research Development Corporation | Method and apparatus for transparent tone-in-band transmitter, receiver and system processing |
US5134634A (en) * | 1989-08-31 | 1992-07-28 | Nec Corporation | Multilevel quadrature amplitude demodulator capable of compensating for a quadrature phase deviation of a carrier signal pair |
FR2658016B1 (fr) * | 1990-02-06 | 1994-01-21 | Etat Francais Cnet | Procede de diffusion de donnees numeriques, notamment pour la radiodiffusion a haut debit vers des mobiles, a entrelacement temps-frequence et demodulation coherente, et recepteur correspondant. |
US5179576A (en) * | 1990-04-12 | 1993-01-12 | Hopkins John W | Digital audio broadcasting system |
US5291289A (en) * | 1990-11-16 | 1994-03-01 | North American Philips Corporation | Method and apparatus for transmission and reception of a digital television signal using multicarrier modulation |
US5315583A (en) * | 1991-04-11 | 1994-05-24 | Usa Digital Radio | Method and apparatus for digital audio broadcasting and reception |
US5278826A (en) * | 1991-04-11 | 1994-01-11 | Usa Digital Radio | Method and apparatus for digital audio broadcasting and reception |
US5333155A (en) * | 1991-04-25 | 1994-07-26 | Rohde & Schwarz Gmbh & Co. Kg | Method and system for transmitting digital audio signals from recording studios to the various master stations of a broadcasting network |
DE4125606A1 (de) * | 1991-08-02 | 1993-02-04 | Rohde & Schwarz | Verfahren zum uebertragen von digitalen hdtv-signalen |
JP2904986B2 (ja) * | 1992-01-31 | 1999-06-14 | 日本放送協会 | 直交周波数分割多重ディジタル信号送信装置および受信装置 |
-
1994
- 1994-03-07 US US08/206,368 patent/US5588022A/en not_active Expired - Lifetime
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-
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- 1996-09-06 MX MX9603971A patent/MX9603971A/es unknown
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002512493A (ja) * | 1998-04-17 | 2002-04-23 | エンカメラ サイエンシィーズ コーポレーション | 既存の通信システムのための拡大された情報容量 |
JP2003502939A (ja) * | 1999-06-24 | 2003-01-21 | アイビキュイティ・デジタル・コーポレイション | デジタル音声放送信号の伝送モード及び同期を突き止める方法及び装置 |
JP2005244957A (ja) * | 2004-01-26 | 2005-09-08 | Ibiquity Digital Corp | ハイブリッドamインバンドオンチャンネルデジタル音声放送方式のためのフォワード誤り訂正符号化方式 |
JP4676772B2 (ja) * | 2004-01-26 | 2011-04-27 | アイビキュイティ・デジタル・コーポレイション | ハイブリッドamインバンドオンチャンネルデジタル音声放送方式のためのフォワード誤り訂正符号化方式 |
Also Published As
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---|---|
ATE201540T1 (de) | 2001-06-15 |
BR9507009A (pt) | 1997-09-16 |
CA2185003A1 (en) | 1995-09-14 |
WO1995024781A1 (en) | 1995-09-14 |
EP0749650A1 (en) | 1996-12-27 |
DE69521033D1 (de) | 2001-06-28 |
AU2374595A (en) | 1995-09-25 |
JP4269003B2 (ja) | 2009-05-27 |
CN1496034A (zh) | 2004-05-12 |
RU2140708C1 (ru) | 1999-10-27 |
JP2008125088A (ja) | 2008-05-29 |
CN1146835A (zh) | 1997-04-02 |
CA2185003C (en) | 2005-01-04 |
MX9603971A (es) | 1998-11-30 |
DE69521033T2 (de) | 2001-11-08 |
CN1143463C (zh) | 2004-03-24 |
KR100342286B1 (ko) | 2002-11-29 |
TW256972B (ja) | 1995-09-11 |
US5588022A (en) | 1996-12-24 |
EP0749650B1 (en) | 2001-05-23 |
NZ300094A (en) | 1998-01-26 |
AU687198B2 (en) | 1998-02-19 |
KR970701977A (ko) | 1997-04-12 |
JP4269014B2 (ja) | 2009-05-27 |
CN100358271C (zh) | 2007-12-26 |
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