CA2490529A1 - Repeater with digital channelizer - Google Patents

Repeater with digital channelizer Download PDF

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Publication number
CA2490529A1
CA2490529A1 CA002490529A CA2490529A CA2490529A1 CA 2490529 A1 CA2490529 A1 CA 2490529A1 CA 002490529 A CA002490529 A CA 002490529A CA 2490529 A CA2490529 A CA 2490529A CA 2490529 A1 CA2490529 A1 CA 2490529A1
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CA
Canada
Prior art keywords
signal
digital
frequency
digital signal
analog
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002490529A
Other languages
French (fr)
Other versions
CA2490529C (en
Inventor
Abraham Hasarchi
Alex Baber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Axell Wireless Ltd
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Individual
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=29733786&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2490529(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2490529A1 publication Critical patent/CA2490529A1/en
Application granted granted Critical
Publication of CA2490529C publication Critical patent/CA2490529C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0294—Variable filters; Programmable filters
    • 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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
    • H04B1/001—Channel filtering, i.e. selecting a frequency channel within the SDR system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources

Abstract

In order to retransmit a communication channel at a specific frequency, a receiver (100) may receive a signal including the communication channel's specific frequency. An analog to digital converter (130) may generate a digital signal correlated to the received signal and the digital signal may be passed through a digital filter(140) configured to filter the digital signal and pass frequency components at or around the frequency of the communication channel's specific frequency. A digital to analog converter (150) may generate an analog signal correlated to the filtered digital signal and a transmitter may transmit the analog signal.

Claims (11)

1. A method of retransmitting a communication channel at a specific frequency, said method comprising:
receiving a signal including the communication channel's specific frequency;
generating a digital signal correlated to the received signal;
filtering the digital signal with a digital filter configured to pass frequency components at or around the frequency of the communication channels specific frequency;
generating an analog signal correlated to the filtered digital signal; and transmuting the analog signal correlated to the filtered digital signal.
2. The method according to claim 1, further comprising down-converting the received signal to an intermediate frequency prior to generating a digital signal.
3. The method according to claim 2, further comprising up-converting the analog signal correlated to the filtered digital signal prior to transmitting the analog signal.
4. The method according to claim 1, further comprising filtering the digital signal with a digital filter configured to pass frequency components at or around a second frequency associated with a second communication channel.
5. The method according to claim 4, further comprising combining the digital signals out from each of said filtering steps and generating an analog signal correlated to the combined digital signal.
6. The method according to claim 5, further comprising transmitting the analog signal correlated to the combined digital signal.
7. A system for retransmitting a communication channel at a specific frequency, said system comprising:
a receiver to receive a signal including the communication channel's specific frequency;
an analog to digital converter to generate a digital signal correlated to the received signal;
a digital filter configured to filter the digital signal and pass frequency components at or around the frequency of the communication channel's specific frequency;
a digital to analog converter to generate an analog signal correlated to the filtered digital signal; and a transmitter to transmit the analog signal correlated to the filtered digital signal.
8. The system according to claim 7, further comprising a down converter to convert the received signal to an intermediate frequency.
9. The system according to claim 8, further comprising an up converter to convert the analog signal correlated to the filtered digital signal to a tranmission frequency.
10. The system according to claim 7, further comprising a second digital filter configured to pass frequency components at or around a second frequency associated with a second communication channel.
11. The system according to claim 10, futher comprising a summing unit to combine outputs from said first and second digital filters.
CA2490529A 2002-06-20 2003-06-22 Repeater with digital channelizer Expired - Fee Related CA2490529C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/175,146 2002-06-20
US10/175,146 US6873823B2 (en) 2002-06-20 2002-06-20 Repeater with digital channelizer
PCT/IL2003/000526 WO2004002015A2 (en) 2002-06-20 2003-06-22 Repeater with digital channelizer

Publications (2)

Publication Number Publication Date
CA2490529A1 true CA2490529A1 (en) 2003-12-31
CA2490529C CA2490529C (en) 2012-12-11

Family

ID=29733786

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2490529A Expired - Fee Related CA2490529C (en) 2002-06-20 2003-06-22 Repeater with digital channelizer

Country Status (11)

Country Link
US (1) US6873823B2 (en)
EP (1) EP1522155B1 (en)
KR (1) KR100992663B1 (en)
CN (1) CN1685632A (en)
AU (1) AU2003238647A1 (en)
CA (1) CA2490529C (en)
DE (1) DE20321814U1 (en)
EA (1) EA006619B1 (en)
ES (1) ES2390268T3 (en)
IL (1) IL165824A0 (en)
WO (1) WO2004002015A2 (en)

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Also Published As

Publication number Publication date
ES2390268T3 (en) 2012-11-08
KR100992663B1 (en) 2010-11-08
CA2490529C (en) 2012-12-11
EP1522155A2 (en) 2005-04-13
EA006619B1 (en) 2006-02-24
EP1522155A4 (en) 2010-06-02
EA200500050A1 (en) 2005-08-25
KR20050024345A (en) 2005-03-10
WO2004002015A2 (en) 2003-12-31
AU2003238647A1 (en) 2004-01-06
CN1685632A (en) 2005-10-19
US20030236067A1 (en) 2003-12-25
IL165824A0 (en) 2006-01-15
US6873823B2 (en) 2005-03-29
EP1522155B1 (en) 2012-07-04
WO2004002015A3 (en) 2004-03-04
DE20321814U1 (en) 2010-07-29

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Effective date: 20210622