MX9708913A - Sistema de comunicacion de acceso multiple de division de frecuencia y codigo doblemente ortogonal. - Google Patents
Sistema de comunicacion de acceso multiple de division de frecuencia y codigo doblemente ortogonal.Info
- Publication number
- MX9708913A MX9708913A MX9708913A MX9708913A MX9708913A MX 9708913 A MX9708913 A MX 9708913A MX 9708913 A MX9708913 A MX 9708913A MX 9708913 A MX9708913 A MX 9708913A MX 9708913 A MX9708913 A MX 9708913A
- Authority
- MX
- Mexico
- Prior art keywords
- communication system
- division multiple
- multiple access
- orthogonal code
- frequency division
- 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
- H04L27/26—Systems using multi-frequency codes
- H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
-
- 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
-
- 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/204—Multiple access
- H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
- H04B7/2634—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] for channel frequency control
-
- 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
- H04L5/026—Multiplexing of multicarrier modulation signals using code division
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Selective Calling Equipment (AREA)
- Transmitters (AREA)
Abstract
La presente invencion se refiere a un sistema de comunicacion de radio de acceso multiple por division de codigo ortogonal (BPSK) que tiene al menos una estacion base y una pluralidad de terminales de abonado/usuario, para comunicar datos, medios transmisores que incluyen: medios moduladores MPSK conectados para recibir los datos, medios de modulador bifásicos (BPSK) conectados al modulador MPSK, un generador de un conjunto de funciones RW que tiene medios para seleccionar un conjunto de funciones RW dadas, cada funcion RW tiene una velocidad de corte RW predeterminada, un sintetizador de frecuencia portadora, conectado al modulador MPSK que genera frecuencias portadoras seleccionadas, las cuales están separadas por la velocidad de corte RW, un generador de codigo PN para proporcionar una señal de codigo PN seleccionada, medios para sumar un conjunto de señales de funciones RW dadas seleccionadas con la señal de codigo PN y proporcionar una señal de funcion de dispersion a los medios moduladores bifásicos, los medios modulares bifásicos producen una señal compuesta que sale de los medios moduladores MPSK y la señal de la funcion de dispersion, el conjunto de funciones RW seleccionado es un miembro de secuencias binarias fijas, las cuales son ortogonales sobre un periodo de símbolos, y medios para convertir ascendetemente la señal compuesta del modulador bifásico a una banda de frecuencia de emision para la transmision.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08444749 | 1995-05-19 | ||
US08/444,749 US5623487A (en) | 1995-05-19 | 1995-05-19 | Doubly orthogonal code and frequency division multiple access communication system |
Publications (2)
Publication Number | Publication Date |
---|---|
MX9708913A true MX9708913A (es) | 1998-06-30 |
MXPA97008913A MXPA97008913A (es) | 1998-10-30 |
Family
ID=
Also Published As
Publication number | Publication date |
---|---|
EP0829155A4 (en) | 2003-01-22 |
CA2221101A1 (en) | 1996-11-21 |
KR100426543B1 (ko) | 2004-06-16 |
EP0829155B1 (en) | 2004-07-21 |
US5623487A (en) | 1997-04-22 |
DE69632954T2 (de) | 2005-07-28 |
JP2003505005A (ja) | 2003-02-04 |
DE69632954D1 (de) | 2004-08-26 |
WO1996037066A1 (en) | 1996-11-21 |
AU710269B2 (en) | 1999-09-16 |
AU5920496A (en) | 1996-11-29 |
KR19990014914A (ko) | 1999-02-25 |
EP0829155A1 (en) | 1998-03-18 |
BR9608879A (pt) | 1999-07-06 |
ATE271739T1 (de) | 2004-08-15 |
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