AR031519A1 - A RADIO SIGNAL TRANSMITTER, A SIGNAL RECEIVER, A COMMUNICATIONS DEVICE AND A METHOD - Google Patents

A RADIO SIGNAL TRANSMITTER, A SIGNAL RECEIVER, A COMMUNICATIONS DEVICE AND A METHOD

Info

Publication number
AR031519A1
AR031519A1 ARP000102189A ARP000102189A AR031519A1 AR 031519 A1 AR031519 A1 AR 031519A1 AR P000102189 A ARP000102189 A AR P000102189A AR P000102189 A ARP000102189 A AR P000102189A AR 031519 A1 AR031519 A1 AR 031519A1
Authority
AR
Argentina
Prior art keywords
displacement
receiver
transmitter
code
symbols
Prior art date
Application number
ARP000102189A
Other languages
Spanish (es)
Original Assignee
Navcom Tech Inc
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
Priority claimed from US09/522,393 external-priority patent/US6430212B1/en
Application filed by Navcom Tech Inc filed Critical Navcom Tech Inc
Publication of AR031519A1 publication Critical patent/AR031519A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/091—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector using a sampling device
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/181—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a numerical count result being used for locking the loop, the counter counting during fixed time intervals
    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker
    • H04J13/0029—Gold
    • 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
    • H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
    • H04L27/2007—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained
    • H04L27/2017—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation
    • 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
    • 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
    • H04L2027/0055—Closed loops single phase

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Un dispositivo de comunicaciones que incluye un transmisor y un receptor. El transmisor incluye un codificador M-ario configurado para generar un numero M-1 de símbolos distintivos, cada uno de los cuales comprende k bits. M es iguala 2k y k es un entero positivo. El transmisor también incluye un generador de codigos que se configura para producir secuencias de palabras en codigo de espectro expandido sobre la base de los símbolos que genera el codificador M-ario y sobre la base de las funciones polinomicas de codigo Gold primera y segunda. El transmisor envía una senal de radio con base en las secuencias de palabras en codigo de espectro expandido. El receptor se configura para recibir la senal de radio El receptor incluye un primer registro para desplazamiento configurado para recibir una senal de entrada que se genera sobre la base de la senal de radio que se recibe y un segundo registro para desplazamiento que se configura para recibir y desplazar en forma circular una secuencia de palabras en codigo generadas en forma local que es idéntica a la secuencia de codigo de palabras que se utiliza para codificar los símbolos. El receptor también incluye un acumulador acoplado a los registros de desplazamiento primero y segundo, y que se configura para multiplicar y acumular los valores almacenados en los registros para desplazamiento primero y segundo cada vez que el segundo registro para desplazamiento se desplaza en forma circular y un dispositivo selector acoplado al acumulador y configurado para identificar un símbolo entre la pluralidad de símbolos que tienen como bases las salidas del acumulador. Sumado a ello, se brinda explicacion respecto de las radios moviles que tienen la capacidad de sincronizar la frecuencia de sus respectivos osciladores a sus respectivas estaciones de base para reducir la probabilidad de introducir errores de demodulacion tanto en los enlaces de comunicaciones de base -a- movil como en los de movil -a- base.A communications device that includes a transmitter and a receiver. The transmitter includes an M-Aryan encoder configured to generate an M-1 number of distinctive symbols, each of which comprises k bits. M equals 2k and k is a positive integer. The transmitter also includes a code generator that is configured to produce word sequences in expanded spectrum code based on the symbols generated by the M-Aryan encoder and based on the first and second Gold code polynomial functions. The transmitter sends a radio signal based on the sequences of words in expanded spectrum code. The receiver is configured to receive the radio signal The receiver includes a first register for displacement configured to receive an input signal that is generated on the basis of the radio signal that is received and a second register for displacement that is configured to receive and circularly moving a sequence of locally generated code words that is identical to the word code sequence used to encode the symbols. The receiver also includes an accumulator coupled to the first and second displacement registers, and which is configured to multiply and accumulate the values stored in the first and second displacement registers each time the second displacement register is circularly moved and selector device coupled to the accumulator and configured to identify a symbol among the plurality of symbols based on the accumulator outputs. In addition to this, an explanation is given regarding the mobile radios that have the ability to synchronize the frequency of their respective oscillators to their respective base stations to reduce the probability of introducing demodulation errors both in the base communication links -a- mobile as in the mobile-to-base.

ARP000102189A 1999-05-06 2000-05-05 A RADIO SIGNAL TRANSMITTER, A SIGNAL RECEIVER, A COMMUNICATIONS DEVICE AND A METHOD AR031519A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US13288299P 1999-05-06 1999-05-06
US09/522,393 US6430212B1 (en) 1999-05-06 2000-03-09 Spread-spectrum GMSK/M-ary radio
US09/564,683 US6760393B1 (en) 1999-05-06 2000-05-04 Spread-spectrum GMSK/M-ary radio with oscillator frequency correction

Publications (1)

Publication Number Publication Date
AR031519A1 true AR031519A1 (en) 2003-09-24

Family

ID=27384364

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP000102189A AR031519A1 (en) 1999-05-06 2000-05-05 A RADIO SIGNAL TRANSMITTER, A SIGNAL RECEIVER, A COMMUNICATIONS DEVICE AND A METHOD

Country Status (5)

Country Link
EP (1) EP1188249A4 (en)
JP (1) JP2003530728A (en)
AR (1) AR031519A1 (en)
BR (1) BR0010340A (en)
WO (1) WO2000069088A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6430212B1 (en) 1999-05-06 2002-08-06 Navcom Technology, Inc. Spread-spectrum GMSK/M-ary radio
US7672285B2 (en) 2004-06-28 2010-03-02 Dtvg Licensing, Inc. Method and apparatus for minimizing co-channel interference by scrambling
US7161988B2 (en) * 2004-04-12 2007-01-09 The Directv Group, Inc. Method and apparatus for minimizing co-channel interference
US8213553B2 (en) 2004-04-12 2012-07-03 The Directv Group, Inc. Method and apparatus for identifying co-channel interference
JP2007533262A (en) * 2004-04-12 2007-11-15 ザ・ディレクティービー・グループ・インコーポレイテッド Physical layer header scrambling in satellite broadcasting systems.
EP1929683B1 (en) 2005-08-26 2011-06-22 The DIRECTV Group, Inc. Method and apparatus for determining scrambling codes for signal transmission
US8724662B2 (en) * 2012-06-25 2014-05-13 Johnson & Johnson Vision Care, Inc. Wireless communication protocol for low power receivers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114155A (en) * 1976-07-30 1978-09-12 Cincinnati Electronics Corporation Position determining apparatus and method
US4538281A (en) * 1982-05-06 1985-08-27 Rockwell International Corporation Adaptive acquisition of multiple access codes
US5311542A (en) * 1990-09-19 1994-05-10 Honeywell Inc. Spread spectrum communication system
FR2681199B1 (en) * 1991-09-11 1993-12-03 Agence Spatiale Europeenne METHOD AND DEVICE FOR MULTIPLEXING DATA SIGNALS.
US5210770A (en) * 1991-09-27 1993-05-11 Lockheed Missiles & Space Company, Inc. Multiple-signal spread-spectrum transceiver
FI97003C (en) * 1993-09-27 1996-09-25 Nokia Telecommunications Oy Method for controlling a phase-locked loop and a phase-locked loop
US5463657A (en) * 1994-02-15 1995-10-31 Lockheed Missiles & Space Company, Inc. Detection of a multi-sequence spread spectrum signal
JP3483991B2 (en) * 1995-07-27 2004-01-06 沖電気工業株式会社 Spread code generator for code division multiple access communication, code division multiple access communication system, and spread code generation method for code division multiple access communication

Also Published As

Publication number Publication date
WO2000069088A1 (en) 2000-11-16
BR0010340A (en) 2002-06-04
WO2000069088A8 (en) 2001-03-22
EP1188249A4 (en) 2006-12-27
JP2003530728A (en) 2003-10-14
EP1188249A1 (en) 2002-03-20

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