SE405306B - Forfarande for overforing av digitala data via troposferen samt anordning for genomforande av forfarandet - Google Patents
Forfarande for overforing av digitala data via troposferen samt anordning for genomforande av forfarandetInfo
- Publication number
- SE405306B SE405306B SE7511173A SE7511173A SE405306B SE 405306 B SE405306 B SE 405306B SE 7511173 A SE7511173 A SE 7511173A SE 7511173 A SE7511173 A SE 7511173A SE 405306 B SE405306 B SE 405306B
- Authority
- SE
- Sweden
- Prior art keywords
- procedure
- troposphere
- transmission
- digital data
- data via
- Prior art date
Links
Classifications
-
- 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
- H04L27/2035—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 a single or unspecified number of carriers
- H04L27/2042—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 a single or unspecified number of carriers with more than two phase states
- H04L27/2046—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 a single or unspecified number of carriers with more than two phase states in which the data are represented by carrier phase
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
-
- 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
- H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
- H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
- H04L27/2277—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals using remodulation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Transmitters (AREA)
- Radio Transmission System (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Communication Control (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/512,654 US3980945A (en) | 1974-10-07 | 1974-10-07 | Digital communications system with immunity to frequency selective fading |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7511173L SE7511173L (sv) | 1976-04-08 |
SE405306B true SE405306B (sv) | 1978-11-27 |
Family
ID=24039995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7511173A SE405306B (sv) | 1974-10-07 | 1975-10-06 | Forfarande for overforing av digitala data via troposferen samt anordning for genomforande av forfarandet |
Country Status (10)
Country | Link |
---|---|
US (1) | US3980945A (it) |
AT (1) | AT373455B (it) |
CA (1) | CA1057356A (it) |
DE (1) | DE2544693C3 (it) |
ES (2) | ES441261A1 (it) |
FR (1) | FR2287812A1 (it) |
GB (1) | GB1510169A (it) |
IT (1) | IT1047695B (it) |
NO (1) | NO142853C (it) |
SE (1) | SE405306B (it) |
Families Citing this family (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4286333A (en) * | 1977-08-27 | 1981-08-25 | E M I Limited | Data transmission |
FR2474791A1 (fr) * | 1980-01-29 | 1981-07-31 | Thomson Csf | Systeme de transmission radioelectrique en diversite, de structure simple et economique, et reseau de telecommunication comportant de tels systemes |
US4495619A (en) * | 1981-10-23 | 1985-01-22 | At&T Bell Laboratories | Transmitter and receivers using resource sharing and coding for increased capacity |
US4653068A (en) * | 1984-10-19 | 1987-03-24 | Itt Corporation | Frequency hopping data communication system |
US5103460A (en) * | 1989-10-17 | 1992-04-07 | Clarence H. Stewart | Spread spectrum intercept apparatus and method |
US5265121A (en) * | 1989-10-17 | 1993-11-23 | Juanita H. Stewart | Spread spectrum coherent processor |
US5077753A (en) * | 1990-04-09 | 1991-12-31 | Proxim, Inc. | Radio communication system using spread spectrum techniques |
GB9010637D0 (en) * | 1990-05-11 | 1990-07-04 | Secr Defence | A high frequency multichannel diversity differential phase shift(dpsk)communications system |
US5276703A (en) * | 1992-01-13 | 1994-01-04 | Windata, Inc. | Wireless local area network communications system |
US7515896B1 (en) | 1998-10-21 | 2009-04-07 | Parkervision, Inc. | Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships |
US6061551A (en) | 1998-10-21 | 2000-05-09 | Parkervision, Inc. | Method and system for down-converting electromagnetic signals |
US6091940A (en) | 1998-10-21 | 2000-07-18 | Parkervision, Inc. | Method and system for frequency up-conversion |
US6694128B1 (en) | 1998-08-18 | 2004-02-17 | Parkervision, Inc. | Frequency synthesizer using universal frequency translation technology |
US6813485B2 (en) | 1998-10-21 | 2004-11-02 | Parkervision, Inc. | Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same |
US6049706A (en) | 1998-10-21 | 2000-04-11 | Parkervision, Inc. | Integrated frequency translation and selectivity |
US6061555A (en) * | 1998-10-21 | 2000-05-09 | Parkervision, Inc. | Method and system for ensuring reception of a communications signal |
US7027786B1 (en) | 1998-10-21 | 2006-04-11 | Parkervision, Inc. | Carrier and clock recovery using universal frequency translation |
US7236754B2 (en) | 1999-08-23 | 2007-06-26 | Parkervision, Inc. | Method and system for frequency up-conversion |
US6370371B1 (en) | 1998-10-21 | 2002-04-09 | Parkervision, Inc. | Applications of universal frequency translation |
US6542722B1 (en) | 1998-10-21 | 2003-04-01 | Parkervision, Inc. | Method and system for frequency up-conversion with variety of transmitter configurations |
US7295826B1 (en) | 1998-10-21 | 2007-11-13 | Parkervision, Inc. | Integrated frequency translation and selectivity with gain control functionality, and applications thereof |
US6560301B1 (en) | 1998-10-21 | 2003-05-06 | Parkervision, Inc. | Integrated frequency translation and selectivity with a variety of filter embodiments |
US7039372B1 (en) | 1998-10-21 | 2006-05-02 | Parkervision, Inc. | Method and system for frequency up-conversion with modulation embodiments |
US6704549B1 (en) | 1999-03-03 | 2004-03-09 | Parkvision, Inc. | Multi-mode, multi-band communication system |
US7006805B1 (en) | 1999-01-22 | 2006-02-28 | Parker Vision, Inc. | Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service |
US6704558B1 (en) | 1999-01-22 | 2004-03-09 | Parkervision, Inc. | Image-reject down-converter and embodiments thereof, such as the family radio service |
US6853690B1 (en) | 1999-04-16 | 2005-02-08 | Parkervision, Inc. | Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments |
US6879817B1 (en) | 1999-04-16 | 2005-04-12 | Parkervision, Inc. | DC offset, re-radiation, and I/Q solutions using universal frequency translation technology |
US6873836B1 (en) | 1999-03-03 | 2005-03-29 | Parkervision, Inc. | Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology |
US7110435B1 (en) | 1999-03-15 | 2006-09-19 | Parkervision, Inc. | Spread spectrum applications of universal frequency translation |
US7110444B1 (en) | 1999-08-04 | 2006-09-19 | Parkervision, Inc. | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations |
US7693230B2 (en) | 1999-04-16 | 2010-04-06 | Parkervision, Inc. | Apparatus and method of differential IQ frequency up-conversion |
US7065162B1 (en) | 1999-04-16 | 2006-06-20 | Parkervision, Inc. | Method and system for down-converting an electromagnetic signal, and transforms for same |
US6663211B2 (en) * | 1999-04-26 | 2003-12-16 | Shuichi Aratsu | Printing device and roll paper |
US6505037B1 (en) * | 1999-06-29 | 2003-01-07 | Sharp Laboratories Of America, Inc. | Data unit detection including antenna diversity |
US7054296B1 (en) | 1999-08-04 | 2006-05-30 | Parkervision, Inc. | Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation |
US7072390B1 (en) | 1999-08-04 | 2006-07-04 | Parkervision, Inc. | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments |
US8295406B1 (en) | 1999-08-04 | 2012-10-23 | Parkervision, Inc. | Universal platform module for a plurality of communication protocols |
US7082171B1 (en) | 1999-11-24 | 2006-07-25 | Parkervision, Inc. | Phase shifting applications of universal frequency translation |
US6963734B2 (en) | 1999-12-22 | 2005-11-08 | Parkervision, Inc. | Differential frequency down-conversion using techniques of universal frequency translation technology |
US7292835B2 (en) | 2000-01-28 | 2007-11-06 | Parkervision, Inc. | Wireless and wired cable modem applications of universal frequency translation technology |
AU2001252897A1 (en) * | 2000-03-09 | 2001-09-17 | Raytheon Company | Frequency domain direct sequence spread spectrum with flexible time frequency code |
US7010286B2 (en) | 2000-04-14 | 2006-03-07 | Parkervision, Inc. | Apparatus, system, and method for down-converting and up-converting electromagnetic signals |
US7554508B2 (en) | 2000-06-09 | 2009-06-30 | Parker Vision, Inc. | Phased array antenna applications on universal frequency translation |
US7010559B2 (en) | 2000-11-14 | 2006-03-07 | Parkervision, Inc. | Method and apparatus for a parallel correlator and applications thereof |
US7454453B2 (en) | 2000-11-14 | 2008-11-18 | Parkervision, Inc. | Methods, systems, and computer program products for parallel correlation and applications thereof |
EP1298811A1 (fr) * | 2001-09-27 | 2003-04-02 | STMicroelectronics S.A. | Procédé et dispositif de détection des impulsions d'un signal incident impulsionnel du type à bande ultra large |
US7072427B2 (en) * | 2001-11-09 | 2006-07-04 | Parkervision, Inc. | Method and apparatus for reducing DC offsets in a communication system |
US7085335B2 (en) | 2001-11-09 | 2006-08-01 | Parkervision, Inc. | Method and apparatus for reducing DC offsets in a communication system |
US6975848B2 (en) | 2002-06-04 | 2005-12-13 | Parkervision, Inc. | Method and apparatus for DC offset removal in a radio frequency communication channel |
US7460584B2 (en) | 2002-07-18 | 2008-12-02 | Parkervision, Inc. | Networking methods and systems |
US7379883B2 (en) | 2002-07-18 | 2008-05-27 | Parkervision, Inc. | Networking methods and systems |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3478268A (en) * | 1967-06-16 | 1969-11-11 | Sylvania Electric Prod | Suppression of strong interfering signals in a radio receiver |
US3665472A (en) * | 1969-10-08 | 1972-05-23 | Sperry Rand Corp | Two-way communication system employing two-clock frequency pseudo-noise signal modulation |
US3714573A (en) * | 1970-05-06 | 1973-01-30 | Hazeltine Corp | Spread-spectrum position monitoring system |
US3794921A (en) * | 1971-11-24 | 1974-02-26 | Raytheon Co | Differentially adaptive communication system |
-
1974
- 1974-10-07 US US05/512,654 patent/US3980945A/en not_active Expired - Lifetime
-
1975
- 1975-08-29 CA CA234,628A patent/CA1057356A/en not_active Expired
- 1975-09-23 GB GB39020/75A patent/GB1510169A/en not_active Expired
- 1975-09-25 ES ES441261A patent/ES441261A1/es not_active Expired
- 1975-10-02 NO NO753334A patent/NO142853C/no unknown
- 1975-10-03 IT IT51654/75A patent/IT1047695B/it active
- 1975-10-06 SE SE7511173A patent/SE405306B/xx unknown
- 1975-10-06 DE DE2544693A patent/DE2544693C3/de not_active Expired
- 1975-10-06 AT AT0762575A patent/AT373455B/de not_active IP Right Cessation
- 1975-10-07 FR FR7530705A patent/FR2287812A1/fr active Granted
-
1976
- 1976-05-28 ES ES448312A patent/ES448312A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3980945A (en) | 1976-09-14 |
IT1047695B (it) | 1980-10-20 |
NO142853C (no) | 1980-10-29 |
ES441261A1 (es) | 1977-03-16 |
DE2544693B2 (de) | 1980-04-03 |
GB1510169A (en) | 1978-05-10 |
NO142853B (no) | 1980-07-21 |
FR2287812B1 (it) | 1981-04-17 |
NO753334L (it) | 1976-04-08 |
AU8455275A (en) | 1977-03-10 |
DE2544693C3 (de) | 1980-12-04 |
FR2287812A1 (fr) | 1976-05-07 |
CA1057356A (en) | 1979-06-26 |
ES448312A1 (es) | 1977-08-01 |
DE2544693A1 (de) | 1976-04-22 |
SE7511173L (sv) | 1976-04-08 |
ATA762575A (de) | 1983-05-15 |
AT373455B (de) | 1984-01-25 |
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