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
Application number
MX9705008A
Other languages
English (en)
Other versions
MXPA97005008A (es
Inventor
Yoshikazu Nara
Original Assignee
Matsushita Electric Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of MX9705008A publication Critical patent/MX9705008A/es
Publication of MXPA97005008A publication Critical patent/MXPA97005008A/es

Links

Classifications

    • 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

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.
MXPA/A/1997/005008A 1996-07-03 1997-07-02 Unidad para estimar la velocidad de transmision MXPA97005008A (es)

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

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Also Published As

Publication number Publication date
JPH1093530A (ja) 1998-04-10
KR980012984A (ko) 1998-04-30
CN1171687A (zh) 1998-01-28
US5978414A (en) 1999-11-02
EP0817440A2 (en) 1998-01-07
CA2209215C (en) 2000-12-05
CA2209215A1 (en) 1998-01-03
EP0817440A3 (en) 2001-02-07
KR100379149B1 (ko) 2003-08-19

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Legal Events

Date Code Title Description
FA Abandonment or withdrawal