NO944905L - Senderanordning for mobilt satelittkommunikasjonsutstyr - Google Patents
Senderanordning for mobilt satelittkommunikasjonsutstyrInfo
- Publication number
- NO944905L NO944905L NO944905A NO944905A NO944905L NO 944905 L NO944905 L NO 944905L NO 944905 A NO944905 A NO 944905A NO 944905 A NO944905 A NO 944905A NO 944905 L NO944905 L NO 944905L
- Authority
- NO
- Norway
- Prior art keywords
- mobile satellite
- modulation curve
- transmitting device
- communication equipment
- satellite communication
- Prior art date
Links
Classifications
-
- 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
- H04L25/03343—Arrangements at the transmitter end
-
- 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
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
- H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
- H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
- H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
- H04L27/2071—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the carrier phase, e.g. systems with differential coding
Abstract
Senderanordning for mobilt satellittkommunikasjonsutstyr, som omfatter: ¿ et Nyquist-filter (11) som tilføres to rekker ortogonale data (Dj, DQ) som filtreres til en bølgeform, ¿ en modulasjonskurve-utligner (12) som utligner utgangs- signalene (Dx', DQ') fra filteret således at en modulasjons- kurves (det geometriske steds) avstand på en ortogonal akse alltid er konstant fra startpunktet (origo), - en fasemodulator (13) som mottar utgangssignalene (Dj", Dg") fra nevnte modulasjonskurve-utligner og fasemodulerer dem, og - en effektforsterker (14) som mottar utgangssignalet (M) fra fasemodulatoren og forsterker det i et høyfrekvensbånd. På denne måte blir det mulig å fjerne virkningene fra for- vrengning ved AM/FM-omforming i effektforsterkeren.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP32206193 | 1993-12-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO944905D0 NO944905D0 (no) | 1994-12-19 |
NO944905L true NO944905L (no) | 1995-06-22 |
Family
ID=18139483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO944905A NO944905L (no) | 1993-12-21 | 1994-12-19 | Senderanordning for mobilt satelittkommunikasjonsutstyr |
Country Status (4)
Country | Link |
---|---|
US (1) | US5629961A (no) |
CN (1) | CN1071967C (no) |
DE (1) | DE4445823B4 (no) |
NO (1) | NO944905L (no) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5875396A (en) | 1995-11-13 | 1999-02-23 | Wytec, Incorporated | Multichannel radio frequency transmission system to deliver wideband digital data into independent sectorized service areas |
US5796784A (en) * | 1996-03-27 | 1998-08-18 | Motorola, Inc. | Method and apparatus for modifying amplitude of at least one symbol |
US5696794A (en) * | 1996-04-04 | 1997-12-09 | Motorola, Inc. | Method and apparatus for conditioning digitally modulated signals using channel symbol adjustment |
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 |
FR2755335B1 (fr) * | 1996-10-24 | 1998-11-27 | Alsthom Cge Alcatel | Estimateur du defaut de balance d'un modulateur en quadrature et etage de modulation l'utilisant |
US6366619B1 (en) | 1998-08-28 | 2002-04-02 | Sicom, Inc. | Constrained-envelope transmitter and method therefor |
US6104761A (en) * | 1998-08-28 | 2000-08-15 | Sicom, Inc. | Constrained-envelope digital-communications transmission system and method therefor |
US6301310B1 (en) * | 1998-12-14 | 2001-10-09 | Hughes Electronics Corporation | Efficient implementation for systems using CEOQPSK |
US6999522B2 (en) | 2001-09-28 | 2006-02-14 | Intersil Americas, Inc. | Constrained-envelope digital communications transmitter and method therefor |
US6928121B2 (en) | 2001-09-28 | 2005-08-09 | Intersil Americas, Inc. | Digital transmitter with constrained envelope and spectral regrowth over a plurality of carriers |
AU2003225815A1 (en) * | 2002-03-19 | 2003-10-08 | Powerwave Technologies, Inc. | System and method for eliminating signal zero crossings in single and multiple channel communication systems |
CN100413210C (zh) * | 2003-07-08 | 2008-08-20 | 松下电器产业株式会社 | 调制电路设备、调制方法和无线电通信设备 |
AU2005244521A1 (en) * | 2004-12-20 | 2006-07-06 | Nec Australia Pty Ltd | Computing filter coefficients for an equaliser in a communication receiver |
CN101707579B (zh) * | 2009-11-12 | 2012-05-30 | 浙江大学 | 连续相位调制频域均衡调制解调方法 |
CN102355723B (zh) * | 2011-07-06 | 2013-11-06 | 成都林海电子有限责任公司 | 一种基于l波段的射频增益控制方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4706261A (en) * | 1982-08-13 | 1987-11-10 | Hazeltine Corporation | Differential phase modulation |
JPS5985166A (ja) * | 1982-10-29 | 1984-05-17 | Fujitsu Ltd | 位相変調器 |
US4613976A (en) * | 1984-05-02 | 1986-09-23 | British Columbia Telephone Company | Constant envelope offset QPSK modulator |
US4635276A (en) * | 1985-07-25 | 1987-01-06 | At&T Bell Laboratories | Asynchronous and non-data decision directed equalizer adjustment |
US4825448A (en) * | 1986-08-07 | 1989-04-25 | International Mobile Machines Corporation | Subscriber unit for wireless digital telephone system |
US4771438A (en) * | 1987-08-04 | 1988-09-13 | Hayes Microcomputer Products, Inc. | Method and apparatus for phase reference recovery in high speed fast turnaround modem |
JPH0771118B2 (ja) * | 1989-12-27 | 1995-07-31 | 三菱電機株式会社 | 変調装置 |
JP3011948B2 (ja) * | 1989-07-31 | 2000-02-21 | パイオニア株式会社 | ディジタル等化器 |
JPH03171953A (ja) * | 1989-11-30 | 1991-07-25 | Mitsubishi Electric Corp | 線形変調器 |
US5049832A (en) * | 1990-04-20 | 1991-09-17 | Simon Fraser University | Amplifier linearization by adaptive predistortion |
-
1994
- 1994-12-19 NO NO944905A patent/NO944905L/no not_active Application Discontinuation
- 1994-12-20 US US08/360,237 patent/US5629961A/en not_active Expired - Fee Related
- 1994-12-21 CN CN94120775A patent/CN1071967C/zh not_active Expired - Fee Related
- 1994-12-21 DE DE4445823A patent/DE4445823B4/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
NO944905D0 (no) | 1994-12-19 |
CN1071967C (zh) | 2001-09-26 |
CN1113058A (zh) | 1995-12-06 |
DE4445823A1 (de) | 1995-06-22 |
DE4445823B4 (de) | 2005-09-29 |
US5629961A (en) | 1997-05-13 |
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Legal Events
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FC2A | Withdrawal, rejection or dismissal of laid open patent application |