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WO1995012129A1 - Generation coherente de signaux d'emission et de reception a impulsions elargies/comprimees dans un systeme d'identification ou dans un systeme d'emission et de reception d'un capteur - Google Patents

Generation coherente de signaux d'emission et de reception a impulsions elargies/comprimees dans un systeme d'identification ou dans un systeme d'emission et de reception d'un capteur Download PDF

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Publication number
WO1995012129A1
WO1995012129A1 PCT/DE1994/001263 DE9401263W WO9512129A1 WO 1995012129 A1 WO1995012129 A1 WO 1995012129A1 DE 9401263 W DE9401263 W DE 9401263W WO 9512129 A1 WO9512129 A1 WO 9512129A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
circuit
transmission
oscillator
output
Prior art date
Application number
PCT/DE1994/001263
Other languages
German (de)
English (en)
Inventor
Valentin Magori
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1995012129A1 publication Critical patent/WO1995012129A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/288—Coherent receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40—Means for monitoring or calibrating
    • G01S7/4004—Means for monitoring or calibrating of parts of a radar system
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52004—Means for monitoring or calibrating

Definitions

  • the present invention relates to a Wegungsanord- voltage for coherent generation of transmit and Empfangssi ⁇ gnalen, in particular pulse-expanded / -komprim appearing transmitting and receiving signals in an identification or sensor transmitting and receiving system according to the preamble d there claim 1.
  • a circuit arrangement of the type in question is provided, in particular, for identification transmission and reception systems, in which identification tags, so-called ID tags, which work with acoustic surface waves as identification elements are used for identification purposes. These arrangements can also be used for sensor tasks in which the quantity to be sensed affects parameters of an SAW arrangement.
  • ID tags are components in which an electrical signal is converted by means of a transducer into an acoustic surface wave which is reflected by a sequence of reflectors, the reflected acoustic surface wave being transmitted by a transducer which is in is generally the same as the converter that converts the electrical input signal is converted back into an electrical signal.
  • a predetermined code is created which represents this ID tag.
  • the electrical signal representing the code is changed to the interrogation signal sending system is returned, whereby the location at which the ID tag is arranged can be identified.
  • Such identification systems can be used in a large variety of applications.
  • the present invention is based on the object of developing such identification systems in such a way that the range for the query, in particular of ID tags, can be considerably increased for a given output power without loss of resolution.
  • Figure 1 is a block diagram of a first embodiment of a ho odynen circuit arrangement according to the invention.
  • FIG. 2 shows a block diagram of a subcircuit for developing the exemplary embodiment according to FIG. 1 as a heterodyne circuit arrangement.
  • an oscillator 10 which delivers an output signal of frequency fg.
  • a sequence controller 11 is controlled by this output signal with the frequency fg in such a way that it supplies a pulse-shaped output signal f ⁇ .
  • This starting signal fi is fed into a filter 12, which is preferably a dispersive filter working with surface acoustic waves and thus provides a pulse-expanded output signal ⁇ 2.
  • This signal 2 is amplified by an amplifier 13 and forms a transmission signal at a connection 14.
  • the circuit of sequence control 11, filter 12, amplifier 13 and connection 14 therefore forms a transmitter circuit controlled by the oscillator 10.
  • the transmission signal at the connection 14 is optionally passed through a filter 15 and a switch 16 and possibly via a further filter 18 to an input / output 19, from which it is emitted, for example as described above, to an ID tag in a manner not shown becomes.
  • the filter 24 is preferably a dispersive filter which is complementary to the dispersive filter 12 in the transmitter circuit and which generates an impulse-compressed signal f3 from the received signal fj_.
  • This filter output signal f3 is fed into the demodulator 25 which is controlled by the output signal fg of the oscillator 10 and which delivers a signal £ 4 at its output.
  • a further demodulator 29 can be provided in the receiving circuit, in which the output signal f3 of the filter 24 and the oscillator output signal fg shifted in phase by 90 ° by a phase shifter 28 can also be provided
  • This demodulator 29 delivers a signal f4 ⁇ at its output.
  • the output signal £ 4 of the demodulator 25 is fed into a sample and hold stage 26, which controls the oscillator 10.
  • the signal f_ and possibly the signal f4 • are fed into a digital signal processor 27, which processes these signals further.
  • this further processing of the signals is not essential to the invention and therefore does not need to be explained in more detail here.
  • the sequence controller 11 can also be controlled by the digital signal processor 27. This possibility is also shown in dashed lines and need not be explained in more detail here, since it is not essential to the invention.
  • the sequence control 11 is synchronized with the output signal fg of the oscillator 10 and generates a short pulse ⁇ 1 at regular or irregular intervals at a predetermined point in time.
  • This pulse is fed via a pulse former stage, a driver stage or an additional pulse signal generator (these components are not shown) into the dispersive filter 12 working with surface acoustic waves and generates the expanded signal f2 at its output .
  • a pulse former stage a driver stage or an additional pulse signal generator (these components are not shown) into the dispersive filter 12 working with surface acoustic waves and generates the expanded signal f2 at its output .
  • the switch 16 and possibly the filter this signal is emitted via the input / output 19.
  • Part of the expanded pulse-shaped signal £ 2 is fed into the input 22 of the receiving circuit 22, 23, 24, 25 via the switch 16 controlled by the sequence control 11 and a coupling stage 20, possibly via further amplifiers, filters and attenuators.
  • the coupling stage 20, which is directly connected to the transmitter circuit or the input or Output of the filter 18 or can be connected to another suitable point of the transmitter circuit, that is, couples a part of the transmit signal into the receiver circuit.
  • the coupling element can possibly also be omitted if a signal overcoupled by parasitic overcoupling is suitable.
  • the pulse-compressed signal f3, whose center frequency is modulated with a filter function, is produced at the output of the dispersive filter 24, which is complementary to the filter 12.
  • Part of one of the output signals of the modulators 25 and 29, in the exemplary embodiment of the output signal f4 of the demodulator 25, is transferred to the sample and hold stage 26 at a predetermined point in time, which is determined by the sequence control 11 synchronized by the output signal fg of the oscillator 10 accepted.
  • the output signal of this sample and hold stage 26 may be used to control the frequency of the oscillator 10 after further filtering. If necessary, it is also possible to define an additional criterion from the amplitude of the pulse-compressed signal - e.g. B. deriving the maximum.
  • the transmission signal can also be coupled through a coupling element 20a at the IF level or a coupling element 20b at the output frequency level.
  • the sequence control 11 can also be implemented by a microprocessor or signal processor, the clock of which is synchronized with the oscillator 10 or derived from it by frequency division. With appropriate dimensioning of the circuit arrangement, the oscillator 10 snaps onto the center frequency of the impulse response function of the expander / compressor system, so that the received signals, which are received, for example, at the input / output 19 of ID tags, are coherently demodulated. You can therefore without loss of information, in particular the phase information, z. B. be evaluated by means of the digital signal processor 27.
  • FIG. 2 shows a circuit part with which a circuit arrangement according to FIG. 1 can be expanded to form a heterodyne circuit arrangement.
  • FIG. 2 shows the circuit part between the output 14 of the transmitting circuit and the input 22 of the receiving circuit according to FIG. 1 and schematically the coupling of this circuit part to the switch 16 according to FIG. 1.
  • an intermediate frequency oscillator 30 is provided, the output signal of which is mixed in mixers or modulators 31, 32 with the transmission signal at connection 14 or the reception signal at connection 22.
  • An intermediate frequency bandpass filter 33 and 34 is provided behind each of the mixers 31, 32.
  • the output signal of the bandpass 33 is sent via an amplifier 35 and possibly a further filter 37 as a transmission signal to the switch 16 according to FIG. 1, while the reception signal from the switch 16 optionally via a filter 38 and an amplifier 36 to the mixer or modulator 32 and on the bandpass 34 is given to the connector 22.
  • the mode of operation of the circuit arrangement according to FIG. 1 which has been expanded by the circuit part according to FIG. 2 corresponds to that described above. already explained operation of the circuit arrangement of Figure 1 alone.
  • FIGS. 1 and 2 are components known per se, the structure of which is well known to the person skilled in the art, so that details of these components need not be explained in more detail here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Transceivers (AREA)

Abstract

Une circuiterie permet de générer de manière cohérente des signaux d'émission et de réception, notamment des signaux d'émission et de réception à impulsions élargies/comprimées dans un système d'identification ou dans un système d'émission et de réception d'un capteur. Dans cette circuiterie de génération cohérente de signaux d'émission et de réception dans un système d'identification ou dans un système d'émission et de réception d'un capteur, au moins une partie du signal d'émission émis par un circuit émetteur (10 à 14) est couplé à un circuit récepteur (22 à 27), puis utilisé pour synchroniser un oscillateur (10), après avoir été superposé au signal de réception. Le signal d'émission est alors dérivé du signal de sortie de l'oscillateur (10).
PCT/DE1994/001263 1993-10-29 1994-10-27 Generation coherente de signaux d'emission et de reception a impulsions elargies/comprimees dans un systeme d'identification ou dans un systeme d'emission et de reception d'un capteur WO1995012129A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934337088 DE4337088A1 (de) 1993-10-29 1993-10-29 Schaltungsanordnung zur kohärenten Erzeugung von Sende- und Empfangssignalen, insbesondere impulsexpandierten/-komprimierten Sende- und Empfangssignalen in einem Identifikations- oder Sensor-Sende- und Empfangssystem
DEP4337088.8 1993-10-29

Publications (1)

Publication Number Publication Date
WO1995012129A1 true WO1995012129A1 (fr) 1995-05-04

Family

ID=6501420

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1994/001263 WO1995012129A1 (fr) 1993-10-29 1994-10-27 Generation coherente de signaux d'emission et de reception a impulsions elargies/comprimees dans un systeme d'identification ou dans un systeme d'emission et de reception d'un capteur

Country Status (2)

Country Link
DE (1) DE4337088A1 (fr)
WO (1) WO1995012129A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4427982A (en) * 1981-04-28 1984-01-24 The United States Of America As Represented By The Secretary Of The Navy Radar clutter reduction by use of frequency-diverse, wideband pulse-compression waveforms
EP0251498A2 (fr) * 1986-06-21 1988-01-07 THORN EMI Electronics Limited Radar
US4757315A (en) * 1986-02-20 1988-07-12 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Method and apparatus for measuring distance
GB2209643A (en) * 1987-09-04 1989-05-17 Marconi Gec Ltd Pulse compression radar

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1023434A (en) * 1973-03-02 1977-12-27 Salvatore Amoroso (Jr.) Single oscillator microwave transceiver
US3925729A (en) * 1974-08-29 1975-12-09 United Technologies Corp Skirt-tuned single oscillator transceiver
DE2744212C2 (de) * 1977-09-30 1979-11-08 Siemens Ag, 1000 Berlin Und 8000 Muenchen Duplex-Sende-Empfangseinrichtung
JPS5621435A (en) * 1979-07-31 1981-02-27 Nissan Motor Co Ltd Extrahigh frequency transmitting and receiving device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4427982A (en) * 1981-04-28 1984-01-24 The United States Of America As Represented By The Secretary Of The Navy Radar clutter reduction by use of frequency-diverse, wideband pulse-compression waveforms
US4757315A (en) * 1986-02-20 1988-07-12 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Method and apparatus for measuring distance
EP0251498A2 (fr) * 1986-06-21 1988-01-07 THORN EMI Electronics Limited Radar
GB2209643A (en) * 1987-09-04 1989-05-17 Marconi Gec Ltd Pulse compression radar

Also Published As

Publication number Publication date
DE4337088A1 (de) 1995-05-24

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