IT1254400B - Sistema e metodo per calcolare il guadagno di canale e la varianza di rumore di un canale per comunicazioni - Google Patents

Sistema e metodo per calcolare il guadagno di canale e la varianza di rumore di un canale per comunicazioni

Info

Publication number
IT1254400B
IT1254400B ITRM920475A ITRM920475A IT1254400B IT 1254400 B IT1254400 B IT 1254400B IT RM920475 A ITRM920475 A IT RM920475A IT RM920475 A ITRM920475 A IT RM920475A IT 1254400 B IT1254400 B IT 1254400B
Authority
IT
Italy
Prior art keywords
channel
calculating
noise variation
communication channel
channel gain
Prior art date
Application number
ITRM920475A
Other languages
English (en)
Inventor
Bruce D Mueller
Kevin L Baum
David E Borth
Phillip D Rasky
Eric H Winter
Original Assignee
Motorola 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
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of ITRM920475A0 publication Critical patent/ITRM920475A0/it
Publication of ITRM920475A1 publication Critical patent/ITRM920475A1/it
Application granted granted Critical
Publication of IT1254400B publication Critical patent/IT1254400B/it

Links

Classifications

    • 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
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7105—Joint detection techniques, e.g. linear detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0845—Weighted combining per branch equalization, e.g. by an FIR-filter or RAKE receiver per antenna branch
    • 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
    • H04L25/067—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing soft decisions, i.e. decisions together with an estimate of reliability

Abstract

Un sistema (130) ed un procedimento (210-246) per correggere l'interferenza Rauleigh di un segnale trasmesso attraverso un canale multi-percorso. Il sistema (130) calcola in maniera adattativa i valori del guadagno di canale e della varianza di rumore (178) del canale sul quale il segnale viene trasmesso e genera segnali (182) indicativi di tali calcoli che sono applicati ad un decodificatore (188). Il sistema (130) può essere utilizzato per formare una porzione di un ricevitore coerente o non coerente che riceve segnali codificati ed anche differenzialmente codificati.
ITRM920475A 1991-07-02 1992-06-22 Sistema e metodo per calcolare il guadagno di canale e la varianza di rumore di un canale per comunicazioni IT1254400B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/724,663 US5214675A (en) 1991-07-02 1991-07-02 System and method for calculating channel gain and noise variance of a communication channel

Publications (3)

Publication Number Publication Date
ITRM920475A0 ITRM920475A0 (it) 1992-06-22
ITRM920475A1 ITRM920475A1 (it) 1993-12-22
IT1254400B true IT1254400B (it) 1995-09-14

Family

ID=24911346

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM920475A IT1254400B (it) 1991-07-02 1992-06-22 Sistema e metodo per calcolare il guadagno di canale e la varianza di rumore di un canale per comunicazioni

Country Status (13)

Country Link
US (2) US5214675A (it)
JP (1) JP3112029B2 (it)
KR (1) KR960012425B1 (it)
CN (1) CN1027213C (it)
AU (1) AU1919392A (it)
CA (1) CA2087520C (it)
DE (2) DE4292231T1 (it)
FR (1) FR2679085B1 (it)
GB (1) GB2263048B (it)
IT (1) IT1254400B (it)
MX (1) MX9203905A (it)
SE (1) SE502305C2 (it)
WO (1) WO1993001673A1 (it)

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Also Published As

Publication number Publication date
MX9203905A (es) 1993-01-01
SE9203808L (sv) 1993-01-03
CA2087520A1 (en) 1993-01-03
FR2679085A1 (fr) 1993-01-15
SE9203808D0 (sv) 1992-12-18
WO1993001673A1 (en) 1993-01-21
JPH06501366A (ja) 1994-02-10
DE4292231C2 (de) 1995-11-16
CN1068228A (zh) 1993-01-20
KR930702842A (ko) 1993-09-09
SE502305C2 (sv) 1995-10-02
GB9303638D0 (en) 1993-04-28
GB2263048B (en) 1996-02-28
CN1027213C (zh) 1994-12-28
ITRM920475A0 (it) 1992-06-22
JP3112029B2 (ja) 2000-11-27
FR2679085B1 (fr) 1996-08-02
KR960012425B1 (ko) 1996-09-20
GB2263048A (en) 1993-07-07
CA2087520C (en) 1998-12-22
DE4292231T1 (de) 1993-10-07
ITRM920475A1 (it) 1993-12-22
AU1919392A (en) 1993-02-11
US5214675A (en) 1993-05-25
US5379324A (en) 1995-01-03

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