MX9705008A - Unidad para estimar la velocidad de transmision. - Google Patents
Unidad para estimar la velocidad de transmision.Info
- Publication number
- MX9705008A MX9705008A MX9705008A MX9705008A MX9705008A MX 9705008 A MX9705008 A MX 9705008A MX 9705008 A MX9705008 A MX 9705008A MX 9705008 A MX9705008 A MX 9705008A MX 9705008 A MX9705008 A MX 9705008A
- Authority
- MX
- Mexico
- Prior art keywords
- transmission rate
- candidate transmission
- decoded
- signals
- candidate
- Prior art date
Links
Classifications
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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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
-
- 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
- H04L25/0262—Arrangements for detecting the data rate of an incoming signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0046—Code rate detection or code type detection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Artificial Intelligence (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Error Detection And Correction (AREA)
- Communication Control (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
Se describe un método y sistema para determinar una velocidad de transmision real de una comunicacion codificada que ha sido transmitida a una de una pluralidad de velocidades de transmision. Una comunicacion codificada se decodifica a la pluralidad de velocidades de transmision para generar señales decodificadas y parámetros de decodificacion los cuales indican la confiabilidad de las señales decodificadas. Se identifican una o más velocidades de transmision candidatas en base a los parámetros de confiabilidad de la decodificacion. Si unicamente existe una velocidad de transmision candidata, se determina que la velocidad de transmision real es la velocidad de transmision candidata. Si existe más de una velocidad de transmision candidata, las señales decodificadas se recodifican a las velocidades de transmision candidatas a las cuales fueron decodificadas. Los bits de la comunicacion se comparan entonces con los bits de las señales recodificadas para cada velocidad de transmision candidata para determinar la velocidad de transmision real. Se describe además un método y sistema para determinar los valores de umbral para la comparacion de los parámetros de confiabilidad de la decodificacion para identificar las velocidades de transmision candidatas. Además de describe un método y sistema el cual determina aquellos valores de umbral en base a las condiciones de recepcion detectadas, incluyendo la fuerza relativa de las señales de componentes de trayectorias multiples y la potencia total recibida en la comunicacion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08675010 | 1996-07-03 | ||
| US08/675,010 US5978414A (en) | 1996-07-03 | 1996-07-03 | Transmission rate judging unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MX9705008A true MX9705008A (es) | 1998-07-31 |
| MXPA97005008A MXPA97005008A (es) | 1998-11-09 |
Family
ID=
Also Published As
| Publication number | Publication date |
|---|---|
| US5978414A (en) | 1999-11-02 |
| JPH1093530A (ja) | 1998-04-10 |
| KR980012984A (ko) | 1998-04-30 |
| KR100379149B1 (ko) | 2003-08-19 |
| EP0817440A2 (en) | 1998-01-07 |
| EP0817440A3 (en) | 2001-02-07 |
| CN1171687A (zh) | 1998-01-28 |
| CA2209215A1 (en) | 1998-01-03 |
| CA2209215C (en) | 2000-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FA | Abandonment or withdrawal |