WO2019206567A1 - Procédé d'acquisition d'une réponse impulsionnelle de canal dans un système, en particulier à des fins de communication, dispositif d'émission et dispositif de réception - Google Patents

Procédé d'acquisition d'une réponse impulsionnelle de canal dans un système, en particulier à des fins de communication, dispositif d'émission et dispositif de réception Download PDF

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Publication number
WO2019206567A1
WO2019206567A1 PCT/EP2019/058128 EP2019058128W WO2019206567A1 WO 2019206567 A1 WO2019206567 A1 WO 2019206567A1 EP 2019058128 W EP2019058128 W EP 2019058128W WO 2019206567 A1 WO2019206567 A1 WO 2019206567A1
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WO
WIPO (PCT)
Prior art keywords
signal
impulse response
channel impulse
manipulated
analog
Prior art date
Application number
PCT/EP2019/058128
Other languages
German (de)
English (en)
Inventor
Guido Schröer
Andreas Ziroff
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 WO2019206567A1 publication Critical patent/WO2019206567A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • 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
    • H04B1/7163—Spread spectrum techniques using impulse radio
    • H04B1/71637—Receiver aspects

Definitions

  • the invention relates to a method for detecting a Ka nalimpulsantwort in a, in particular for communication be exaggerated system according to the preamble of claim 1 and a transmitting device according to the preamble of claim 12 and receiving device according to the preamble of claim 14.
  • the channel impulse response is known from communications engineering as a variable describing the properties of a transmission channel. This can be regarded as mathematical models of the Ka nals usually as ideal conditions, in particular idea len transmission channel, reproducing formula. However, measuring the channel impulse response, ie the real transmission conditions, between a point A and a point B is a technical problem.
  • the channel impulse response is mixed with the ideal transmission signal to include an image of reality in the system consideration.
  • the channel impulse response distorts an electromagnetic signal as it propagates in space. It is strongly location-dependent and reflects the environmental influences.
  • this can be used for example in the field of radio location. It is therefore known to provide this function in integrated circuits, ICs. However, despite the evaluation of the location information, these ICs do not provide any measurement of the channel impulse response.
  • the problem underlying the invention is therefore to provide a solution that overcomes the disadvantages of the prior art.
  • This object is achieved by the method for detecting a channel impulse response in a, in particular for communication, system starting from the preamble of claim 1.
  • the inventive method for detecting a Ka nalimpulsantwort in a, in particular for communication be exaggerated system in which at least one transmitter to at least one receiver at least one signal wirelessly, in particular by radio, the transmitter and the receiver are transmitted as discrete , In particular, at least partially designed as an integrated circuit, elements such be driven that
  • the transmitter transmits at least one signal, in particular a narrow pulse
  • a receiver receives the signal propagated through the transmission channel
  • the manipulated signal is prepared so that it can be supplied to a mixer, d) the manipulated prepared signal at the mixer is mixed with a reference signal such that a mixed signal is present which at least correlates with the channel impulse response.
  • One of the significant advantages of the method according to the invention is that at least one extraction of the channel impulse response, in particular the channel impulse response directly, as a useful signal provides, and, in particular by the operation of discrete and / or integrated scarf lines, makes this commercially available.
  • the transmitting device which as further education as radar and / or radio transmitting device, in particular, for example, as RFID, day, can be configured
  • the receiving device which can be configured as Wei ter Struktur as radar and / or radio receiving device, in particular, for example as RFID, tag, means for performing the method and / or its developments are provided.
  • the method according to the invention is further developed in such a way that at least one first filter, in particular bandpass filter, for, in particular bandpass, filtering and / or at least a first amplifier device is supplied for amplification in preparation for the manipulated signal, a signal correlating to the channel impulse response is obtained. that is optimized with respect to further processing, because the useful signal components can be better detected by the filtering and / or amplification Ver.
  • the mixed signal is supplied to a second, in particular as a low pass filter designed, filter for, in particular low-pass filtering.
  • a second in particular as a low pass filter designed, filter for, in particular low-pass filtering.
  • the low-pass filtering frees the signal from unnecessary frequency ranges and thus also reduces the noise level of the signal, so that it is further optimized for detection.
  • the method according to the invention is developed in such a way that the, in particular low-pass, filtered signal is fed to a second amplifier device for amplification and / or at least one analog-to-digital converter for analog-to-digital conversion.
  • the intermediate obtained, in particular, by the previous chenfrequenz-, ZF-, signal in a digital and thus the data processing accessible signal converted, where may be a prior gain of the signal evtl, the conversion can improve.
  • the reference signal is formed from a carrier frequency in the "ultra-wide-band", UWB, frequency range .
  • this approach is complemented by the development of the method according to the invention in which the correlating signal is processed using at least one method of Signalver processing such that the Kanalimpulsant word is extracted from the correlating signal.
  • the development of the inventive Shen method is to be considered, in which the reference signal from egg nem signal generated identically with the transmitted signal is ge forms.
  • the transmitter and the receiver are operated synchronized at least for the duration of the method according to one of the preceding methods, such that the channel impulse response can already be taken as a useful signal without further signal processing.
  • the method according to the invention is developed in such a way that the, in particular low-pass, filtered and / or amplified signal is supplied to a large number of analog-to-digital converters arranged sequentially for analog-to-digital conversion.
  • This allows a cost-effective implementation of the method, since the individual nen analog-to-digital converters lower requirements, in particular with respect.
  • the sample rate exist.
  • the inventive method is further developed the art that the transmitted signal with the transmitting side with a first UWB chip and / or the identically generated signal on the receiving side with a second UWB chip is generated.
  • the use of UWB chips is characterized, among other things, by the fact that they enable highly accurate synchronization.
  • the invention further development of the method according to the invention in which the UWB signals are at least partially formed according to the standard IEEE 02.15 4a. This ensures, among other things, the simultaneous use of the transmission channel for location, communication and synchronization.
  • Figure is a schematic representation of abutsbei game of the method and embodiments of the method according to the invention performing arrangements.
  • the figure shows an embodiment of the method according to the invention, whose operation by means of1,sbei play the arrangements of the invention.
  • the embodiment of the method according to the invention is based on the principle that for measuring a Kanalim pulse response, a transmitting unit Tx at a point A and a receiving unit Rx at a point B remote therefor is verwen det.
  • a first step S1 the transmitter Tx emits a known signal sequence, in the ideal case a pulse.
  • the transmission signal is permanently influenced by the surrounding environment.
  • a signal distorted by the channel characteristics is received in a second step S2.
  • the signal which is initially ideal for example shaped as a pulse, can contain sequence pulses on the receiving side Rx, which then also indicate multipath propagation in the space, which makes use, inter alia, of the invention.
  • these sequence pulses can be detected in which they, as it makes the inven tion proper arrangement, as a discretely constructed circuit group is realized.
  • a narrow pulse is emitted on a transmitting side Tx.
  • this signal is received, bandpass filtered, amplified, converted to a mixer in the baseband and sampled an analog-to-digital converter.
  • the channel impulse response in the time and frequency domain can be analyzed.
  • the invention now goes beyond such built-up integrated circuits (IC), since it offers the possi bility on the contrary to record the channel impulse response or to make the user accessible.
  • the solution of the invention takes distance to the Fo kusstechnik these circuits solely on the provision of concentration and a resulting Optimie tion of the circuit on the communication.
  • the invention solves this paradigm and can be made by the fol lowing based on the embodiments set forth on wide ren inventive considerations details of the invention to make channel impulse response accessible to the user Lich or to record.
  • the invention extends the functional scope of a commercially available ultra-broadband integrated chip (IC) -based communication or location system. It enables the channel impulse response or channel properties to be measured parallel to the location / communication.
  • IC ultra-broadband integrated chip
  • a transmitting unit Tx which consists of a first UWB IC IC1 and a first antenna Al.
  • the chip IC1 is capable of generating IEEE 802.15.4a compliant UWB signals.
  • the first transmission antenna Al emits in a first step S1 of the embodiment of the method according to the invention on the transmitting and receiving side known Signalfol gene.
  • first amplifier AMPL For an extraction of the channel impulse response from the signal received by a second antenna A2 and a third antenna A3 in a second step S2, according to the illustrated exemplary embodiment, after a bandpass filtering on a bandpass filter BP and amplification on one takes place in a third step S3 first amplifier AMPL given two ways to get the channel impulse response.
  • the invention provides that a mixer MX at an input receives the signal coming from the third antenna A3 and mixes it with a reference signal provided in a fourth step S4 in a fifth step S5. At the output of the mixer MX you get the desired signal.
  • the signal is low-pass filtered in a sixth step S6 on a low-pass filter TP.
  • Step S6 eliminates unneeded frequency ranges that would otherwise raise the noise level of the signal.
  • the IF signal in a seventh step S7 amplified by a second amplifier AMP2 again and converted in the following eighth step by an analog-to-digital converter A / D from an analog signal to a digitally tget tetes signal.
  • an analog Digitalkon ⁇ verter (ADC) is used.
  • Possibility 1 which corresponds in the figure to the position of a switch ST to 1, uses as a reference signal generated by the generator G carrier frequency in the UWB Frequenzbe range, with the then the received signal of the upper branch in the fifth step S5 in the purely real inter mediate frequency range from eg 50 Hz to 550 MHz (at a UWB signal bandwidth of 500 MHz) is mixed down. Subsequently , the analog intermediate frequency signal is digitally sampled, ie the sixth to eighth steps are carried out, until the channel impulse response can then be extracted with further signal processing.
  • Possibility 2 which in the figure corresponds to the position of a switch ST to 1, uses as reference signal a signal identical to the transmission signal which is generated on the receiving side Rx with a second UWB chip IC2 in the fourth step S4.
  • a signal identical to the transmission signal which is generated on the receiving side Rx with a second UWB chip IC2 in the fourth step S4.
  • Step S4 a synchronization of transmitting and Empfangsein unit necessary, which is performed by your microprocessor mR and a th third integrated UWB IC IC3, which together with the second chip IC2 form a unit SYNC for synchronization is performed.
  • the resultant output signal at the mixer MX is the desired channel impulse response due to this timed tuning.
  • the analog channel impulse response then also still has to be sampled in the sixth to seventh step S6... S7, ie in particular still. Compared to Option 1 but no further processing is then nope ⁇ tig.
  • the invention can be further developed for this purpose, inter alia, by two methods for converting the analog signal into a digital signal.
  • a powerful ADC can be used. This must have a sample rate of at least 1.1 GSps so that signals with a frequency of up to 550 MHz can be sampled. For UWB channels with a bandwidth of 1 or 1.5 GHz, at least 3 GSps are required.
  • An alternative to this is sequential sampling.
  • several ADCs are used with a much lower sample rate (compared to the first solution).
  • the signal at the output of the intermediate frequency amplifier is transferred by means of Fast Fourier Transformation (FFT) in the frequency domain.
  • FFT Fast Fourier Transformation
  • the spectrum to be scanned is divided into smaller pieces and an ADC is used for each section.
  • the digital subfrequency bands are added together and the overall spectrum of the UWB signal is obtained.
  • the channel impulse response is obtained after the inverse FFT.
  • the synchronization according to the embodiment, in particular the synchronization described in the previous paragraph, is also realized by means of UWB signals.
  • UWB pulses have Due to their very high signal bandwidth, a high-precision temporal resolution in the nano to pico seconds range. This made possible a precise time synchronization between transmitting and receiving units or multiple receiving units.
  • such a synchronization method can also be used to synchronize dedicated radio transmission and reception units in time and to enable a coherent transmission and reception function.
  • the method described in the upper section for synchronizing two radio units can also be used for radio systems with other radio standards.
  • the local oscillator on the various radio units can be synchronized using UWB technology.
  • the software-side control of the transmitting / receiving unit can be synchronized.
  • a highly accurate reference signal then allows a common time base on all devices.
  • a preferred development of the invention is, as a rule, that the transmission signal does not have to consist of a single ultra-wideband pulse, but also with IEEE
  • sampling of the signal in the A / D block has been processed in addition to processing by means of an oscilloscope or a line-strong analog-to-digital converter and alternatively processed by sequential sampling, which represent a cost-effective alternative.

Abstract

L'invention concerne un procédé de détection d'une réponse impulsionnelle de canal dans un système exploité, en particulier, pour la communication, dans lequel au moins un signal est transmis sans fil, en particulier par radio, d'au moins un émetteur à au moins un récepteur, dans lequel émetteur et récepteur sont exploités comme éléments discrets, en particulier, au moins partiellement conçus comme circuit intégré, en ce que e) l'émetteur émet au moins un signal, en particulier une impulsion étroite, f) un récepteur reçoit le signal manipulé par le canal de transmission, g) le signal manipulé est préparé de telle manière qu'il peut être envoyé à un mélangeur, h) le signal manipulé préparé au mélangeur est mélangé avec un signal de référence de telle manière qu'il existe un signal mixte qui correspond au moins à la réponse impulsionnelle du canal. En outre, l'invention concerne un dispositif de transmission et un dispositif de réception dotés chacun de moyens pour la mise en œuvre de la procédure.
PCT/EP2019/058128 2018-04-23 2019-04-01 Procédé d'acquisition d'une réponse impulsionnelle de canal dans un système, en particulier à des fins de communication, dispositif d'émission et dispositif de réception WO2019206567A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018206200.5A DE102018206200A1 (de) 2018-04-23 2018-04-23 Verfahren zur Erfassung einer Kanalimpulsantwort in einem, insbesondere zur Kommunikation betriebenen, System, Sendeeinrichtung und Empfangseinrichtung
DE102018206200.5 2018-04-23

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Publication Number Publication Date
WO2019206567A1 true WO2019206567A1 (fr) 2019-10-31

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WO (1) WO2019206567A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116760433A (zh) * 2023-08-17 2023-09-15 为准（北京）电子科技有限公司 基带脉冲响应信号测量方法、装置、电子设备及介质

Citations (2)

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US8212724B2 (en) * 2008-10-08 2012-07-03 Astrium Gmbh Position indicating process
US20130230076A1 (en) * 2005-01-03 2013-09-05 Stmicroelectronics N.V. Method of coding and decoding a pulse signal, in particular an uwb-ir signal, and corresponding devices

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
US20130230076A1 (en) * 2005-01-03 2013-09-05 Stmicroelectronics N.V. Method of coding and decoding a pulse signal, in particular an uwb-ir signal, and corresponding devices
US8212724B2 (en) * 2008-10-08 2012-07-03 Astrium Gmbh Position indicating process

Non-Patent Citations (1)

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Title
PASAND R ET AL: "Optimal Processing of an Impulse Radio Signal Subjected to Narrow Band Interference", 2005 IEEE 61ST VEHICULAR TECHNOLOGY CONFERENCE. VTC2005- SPRING ; 30 MAY-1 JUNE 2005 ; STOCKHOLM, SWEDEN, IEEE, PISCATAWAY, NJ, USA, vol. 5, 30 May 2005 (2005-05-30), pages 3122 - 3126, XP010856025, ISBN: 978-0-7803-8887-1, DOI: 10.1109/VETECS.2005.1543922 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116760433A (zh) * 2023-08-17 2023-09-15 为准（北京）电子科技有限公司 基带脉冲响应信号测量方法、装置、电子设备及介质
CN116760433B (zh) * 2023-08-17 2023-10-17 为准（北京）电子科技有限公司 基带脉冲响应信号测量方法、装置、电子设备及介质

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