WO2001028121A3 - Spread-spectrum modem with saw resonator and pulse shaping - Google Patents

Spread-spectrum modem with saw resonator and pulse shaping Download PDF

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Publication number
WO2001028121A3
WO2001028121A3 PCT/IL2000/000645 IL0000645W WO0128121A3 WO 2001028121 A3 WO2001028121 A3 WO 2001028121A3 IL 0000645 W IL0000645 W IL 0000645W WO 0128121 A3 WO0128121 A3 WO 0128121A3
Authority
WO
WIPO (PCT)
Prior art keywords
modem
pulse
analog
receiver
saw resonator
Prior art date
Application number
PCT/IL2000/000645
Other languages
French (fr)
Other versions
WO2001028121A2 (en
Inventor
David Ben-Bassat
Moshe Lerner
Original Assignee
Rf Waves Ltd
Ben Bassat David
Moshe Lerner
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 Rf Waves Ltd, Ben Bassat David, Moshe Lerner filed Critical Rf Waves Ltd
Priority to AU78158/00A priority Critical patent/AU7815800A/en
Priority to JP2001530227A priority patent/JP2003511959A/en
Publication of WO2001028121A2 publication Critical patent/WO2001028121A2/en
Publication of WO2001028121A3 publication Critical patent/WO2001028121A3/en

Links

Classifications

    • 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
    • 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
    • H04B1/70712—Spread spectrum techniques using direct sequence modulation with demodulation by means of convolvers, e.g. of the SAW type
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03834—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4902—Pulse width modulation; Pulse position modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/043—Pseudo-noise [PN] codes variable during transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/02—Inter-networking arrangements
    • 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
    • H04B1/709—Correlator structure
    • H04B1/7093—Matched filter type

Abstract

A bidirectional direct sequence spread spectrum half-duplex RF modem. The RF modem can be applied to transmit and receive numerous types of analog and digital pulse modulation. The modem incorporates a SAW based correlator for performing the spreading and de-spreading functions in the transmitter and receiver. A SAW resonator fabricated on the same monolithic substrate provides the frequency source for the oscillator. An upconverter/downconverter provides frequency translation to the desired frequency band. Pulse gating and interrogating pulse shaping are employed to reduce the spectral side bands of the transmitted spread pulse. The RF modem operates as an analog or digital pulse transmitter and receiver. It is adapted to be generic and is versatile enough to be used in many different types of data communication systems, such as OOK, PWM and PPM. The RF modem can be used as the physical (PHY) layer in a layered communication system such as the ISO OSI communication stack. In an alternative embodiment, the transmission bit rate is increased by using a plurality of correlators wherein each is configured with a unique function (i.e., code) that is orthogonal with all other functions.
PCT/IL2000/000645 1999-10-15 2000-10-12 Spread-spectrum modem with saw resonator and pulse shaping WO2001028121A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU78158/00A AU7815800A (en) 1999-10-15 2000-10-12 Rf modem and communications transceiver utilizing saw device and pulse shaping
JP2001530227A JP2003511959A (en) 1999-10-15 2000-10-12 RF modem and communication transceiver utilizing SAW device and pulse shaping

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/419,824 US6535545B1 (en) 1999-10-15 1999-10-15 RF modem utilizing saw resonator and correlator and communications transceiver constructed therefrom
US09/419,824 1999-10-15

Publications (2)

Publication Number Publication Date
WO2001028121A2 WO2001028121A2 (en) 2001-04-19
WO2001028121A3 true WO2001028121A3 (en) 2001-12-27

Family

ID=23663919

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2000/000645 WO2001028121A2 (en) 1999-10-15 2000-10-12 Spread-spectrum modem with saw resonator and pulse shaping

Country Status (8)

Country Link
US (2) US6535545B1 (en)
JP (1) JP2003511959A (en)
KR (1) KR100500025B1 (en)
CN (2) CN100438519C (en)
AU (1) AU7815800A (en)
HK (1) HK1071642A1 (en)
TW (1) TW484261B (en)
WO (1) WO2001028121A2 (en)

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US6970496B1 (en) 2005-11-29
US6535545B1 (en) 2003-03-18
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KR100500025B1 (en) 2005-07-05
HK1071642A1 (en) 2005-07-22

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