MX9704596A - Sistema de radio bidireccional con frecuencia sincronizada. - Google Patents
Sistema de radio bidireccional con frecuencia sincronizada.Info
- Publication number
- MX9704596A MX9704596A MX9704596A MX9704596A MX9704596A MX 9704596 A MX9704596 A MX 9704596A MX 9704596 A MX9704596 A MX 9704596A MX 9704596 A MX9704596 A MX 9704596A MX 9704596 A MX9704596 A MX 9704596A
- Authority
- MX
- Mexico
- Prior art keywords
- response
- radio system
- base
- bidirectional radio
- low cost
- Prior art date
Links
- 230000002457 bidirectional effect Effects 0.000 title abstract 2
- 230000001360 synchronised effect Effects 0.000 title 1
- 238000009825 accumulation Methods 0.000 abstract 1
- 239000000969 carrier Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
- H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/56—Circuits using the same frequency for two directions of communication with provision for simultaneous communication in two directions
-
- 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
- H04B7/2662—Arrangements for Wireless System Synchronisation
- H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
- H04B7/2675—Frequency synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
- H04J1/065—Synchronisation of carrier sources at the receiving station with the carrier source at the transmitting station
-
- 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
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
- H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
-
- 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
- H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
- H04B1/408—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency the transmitter oscillator frequency being identical to the receiver local oscillator frequency
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
- H04L2027/0028—Correction of carrier offset at passband only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0044—Control loops for carrier regulation
- H04L2027/0053—Closed loops
- H04L2027/0057—Closed loops quadrature phase
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Mobile Radio Communication Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Superheterodyne Receivers (AREA)
Abstract
Un sistema de radio bidireccional para un alta acumulacion de datos a bajo costo de un gran numero de unidades en el lugar. Se logra la sincronizacion de frecuencias a bajo costo al transmitir una señal de reloj y transportadora de alta precision en una estacion base, y utilizando circuitos receptores en estaciones remotas para extraer la señal de reloj de la base y la frecuencia transportadora de la base y una trayectoria cerrada de fase para estabilizar a los transportadores de las estaciones remotas. Un desmodulador de incrementos repentinos de frecuencias de radio en el receptor de la estacion base puede descodificar una respuesta corta de la estacion remota al poner en fase la respuesta con la fase y amplitud de un segmento inicial de la respuesta. El desmodulador de incrementos repentinos puede actualizar continuamente el umbral de descodificacion en base a una comparacion de la amplitud de la señal y el valor en cuestion del umbral descodificador.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/361,799 US5604768A (en) | 1992-01-09 | 1994-12-21 | Frequency synchronized bidirectional radio system |
US08361799 | 1994-12-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
MX9704596A true MX9704596A (es) | 1998-07-31 |
MXPA97004596A MXPA97004596A (es) | 1998-11-09 |
Family
ID=
Also Published As
Publication number | Publication date |
---|---|
AU692058B2 (en) | 1998-05-28 |
EP0804833A4 (en) | 2001-07-11 |
NZ337741A (en) | 2001-02-23 |
CA2208460A1 (en) | 1996-06-27 |
NZ301446A (en) | 1999-10-28 |
AU4687396A (en) | 1996-07-10 |
JPH10511516A (ja) | 1998-11-04 |
DE69532722T2 (de) | 2005-02-10 |
EP0804833A1 (en) | 1997-11-05 |
CA2208460C (en) | 2004-11-02 |
EP0804833B1 (en) | 2004-03-17 |
DE69532722D1 (de) | 2004-04-22 |
WO1996019875A1 (en) | 1996-06-27 |
US5604768A (en) | 1997-02-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2208460A1 (en) | Frequency synchronized bidirectional radio system | |
PT620959E (pt) | Sistema de radio bidireccional sincronizado em frequencia | |
ATE206570T1 (de) | Erweitertes mikrocomputersystem für reduktion der funkfrequenzinterferenz | |
EP0333194A3 (en) | Radio data system receiver | |
CA2169551A1 (en) | Apparatus and Method for Maximizing Frequency Offset Tracking Performance in a Digital Receiver | |
DE3169636D1 (en) | Receivers suitable for use in remotely-operable switching devices and data transmission systems | |
MY112310A (en) | Acquisition of carrier phase and symbol timing through joint estimation of phase and timing adjustments | |
CA2139513C (en) | Synchronized offset extraction in a data receiver | |
EP0370797A3 (en) | Radio receiver | |
FR2559629B1 (fr) | Systeme de radiodiffusion de donnees, notamment vers des postes mobiles | |
EP0165967A1 (en) | Fast recovery bias circuit | |
US5274672A (en) | Optimized clock recovery for an MSK system | |
TW353834B (en) | Interference rejection combining with frequency correction | |
DE69943262D1 (de) | Rundfunksystem für lokale information | |
EP0344679A3 (en) | Receiving arrangement with a reception carrier frequency alternately changed from one to another | |
US6381236B1 (en) | Bi-directional digital transmission system and bi-directional digital transmission method | |
EP0736985A3 (en) | FM broadcast receiver for receiving multiplexed character data | |
JPH11331133A (ja) | 双方向ディジタル伝送方法及びその装置 | |
GB2288951A (en) | Synchronising simulcast systems | |
EP0256287A3 (en) | Demodulator for the demodulation of input signals | |
EP0246530A3 (en) | Decoding system of data signals | |
JPS6468142A (en) | Modulator/demodulator | |
JPS6425613A (en) | Traffic information receiver | |
JPS6455916A (en) | Control method for rds receiver | |
JPS6480134A (en) | Transmission right control system |