EP1300909A1 - Appareil pour l'asservissement de phase des lignes d'alimentation d'un système d'antenne avec transmission d'une tonalité pilote - Google Patents

Appareil pour l'asservissement de phase des lignes d'alimentation d'un système d'antenne avec transmission d'une tonalité pilote Download PDF

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Publication number
EP1300909A1
EP1300909A1 EP01123993A EP01123993A EP1300909A1 EP 1300909 A1 EP1300909 A1 EP 1300909A1 EP 01123993 A EP01123993 A EP 01123993A EP 01123993 A EP01123993 A EP 01123993A EP 1300909 A1 EP1300909 A1 EP 1300909A1
Authority
EP
European Patent Office
Prior art keywords
signal
pilot tone
arrangement according
circuit
transmission
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
EP01123993A
Other languages
German (de)
English (en)
Other versions
EP1300909B1 (fr
Inventor
Friedrich Dr. Schumacher
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.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Priority to EP01123993A priority Critical patent/EP1300909B1/fr
Priority to DE10149553A priority patent/DE10149553C1/de
Priority to DE50108983T priority patent/DE50108983D1/de
Priority to US10/265,907 priority patent/US6753811B2/en
Publication of EP1300909A1 publication Critical patent/EP1300909A1/fr
Application granted granted Critical
Publication of EP1300909B1 publication Critical patent/EP1300909B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/267—Phased-array testing or checking devices

Definitions

  • the invention relates to an arrangement for phase adjustment of N supply cables serving to control an antenna arrangement with the help of a broadcast pilot.
  • antenna arrangements are included Single antennas are used, which are controlled via supply cables become. These supply cables influence through existing ones mechanical length differences or by phase differences among themselves the radiation diagram of the antenna arrangement, which is why these phase differences are determined by the system Must not exceed maximum values.
  • the so-called "switched-beam" radio communication systems is used is for control of the N individual antennas, for example, an NxN Butler matrix upstream.
  • NxN Butler matrix upstream.
  • N supply cables are arranged, which, for example, for certain applications should be essentially the same length.
  • a typical value here for example, a maximum permissible phase difference of ⁇ 5 ° between the individual supply cables.
  • the lengths of the supply cables are usually compared before commissioning an antenna arrangement in such a way that first on using a network analyzer a supply cable used as a reference cable Phase difference between the individual supply cables determined and then a phase adjustment to a uniform Phase by shortening the individual supply cables accordingly he follows. It is advantageous on one Basic length part of the supply cable as a so-called "Jumper cable" trained, the basic length preferred to Phase adjustment is used.
  • phase adjustment of the supply cables takes place on site because the electrical lengths of the supply cables during the Location assembly changed by bending the supply cable.
  • the one used to determine the phase difference for example Network analyzer used by an assembly team is common trained as a relatively expensive laboratory device and is through its weight, its mechanical dimensions and its Sensitivity to environmental influences only limited for Commissioning on site suitable.
  • a transmission pilot tone is shifted in time, that is successively, coupled into each individual supply cable and after going through the corresponding one Supply cable decoupled again as a reception pilot tone.
  • the arrangement according to the invention enables phase adjustment both before start-up and during operation of the antenna arrangement and is advantageously carried out with the aid of an adjustment device to be operated from the outside by a service team.
  • a phase actuator for the phase adjustment is provided for each of the total of N supply cables.
  • these N phase actuators are designed as externally operated differential rotary capacitors, which means that there is no need for complex electrical actuation of the phase actuators.
  • a rough adjustment is advantageously carried out at the factory the supply cable in length and one-sided waterproof connector assembly, while on site only one Fine adjustment in phase difference using the phase actuators is made.
  • the problem already described penetrating moisture is avoided and costs and working time saved.
  • phase differences are determined via a serial Interface with the help of a standard laptop, which is the function of a “local maintenance terminal (LMT) "takes over.
  • LMT local maintenance terminal
  • the phase differences of the supply cables are advantageously determined at different frequencies, as a result of which an increase in the accuracy of the phase adjustment is achieved.
  • the transmission pilot tone coupled into the individual supply cables fulfills the criteria of a so-called "Spurios Emission" of a carrier frequency specified in the ETSI specifications, since the transmission pilot tone also reaches the antenna arrangement for radiation.
  • N 4 supply cables L1, L2, L3, L4, which are used to control an antenna arrangement Serve ANT.
  • the supply cables L1 to L4 are on the one hand connected to a decoupling device AKE, the Antenna arrangement is connected upstream, and on the other hand a matching device AGE and a coupling device EKE connected to a transmitter SE.
  • a transmission pilot tone SP arrives at the coupling device EKE and with the help of the AGE adjustment device offset in each of the supply cables L1 to L4.
  • the decoupling device AKE With With the help of the decoupling device AKE, it becomes the respective one Receiving pilot tone EP from the corresponding supply cable L1, L2, L3, L4 decoupled again. Then be relative Phase differences between the supply cables L1 to L4 determined using the AGE matching device accordingly system-related specifications are corrected.
  • the adjustment device has a means for adjusting the phase difference AGE for each of the supply cables L1 to L4 one controllable phase actuator PSG1, PSG2, PSG3, PSG4 on, each as an externally operated differential variable capacitor is executed.
  • the coupling device EKE has a switch S with a Input for receiving the transmission pilot SP and first to Nth, the first to the Nth lead cables L1 to L4, respectively assigned outputs.
  • Each of the N outputs of the switch S a coupler K11, K12, K13, K14 is connected downstream in each case, that the transmission pilot tone SP by the switch S one after the other in one of the supply cables L1 to L4 is coupled.
  • the decoupling device AKE has for decoupling the Reception pilot EP from the respective supply cable L1 to L4 first to Nth, each the first to Nth supply cable Couplers K21, K22, K23, K24 assigned to L1 to L4 and a combiner CB, via which the decoupled one Receiving pilot tone EP to a pilot tone input PTI Pilot tone device PTE for signal processing arrives.
  • the transmit pilot tone SP generated. This arrives via a pilot tone output PTO the coupling device EKE.
  • An example here is coupling the transmission pilot SP via the switch S and the coupler K11 into the supply cable L1 shown. With the help of the coupler K21 it is called Reception pilot tone decoupled again and reaches the Combiner CB to the pilot tone device PTE.
  • the pilot tone device PTE has n data outputs with a connected to its downstream control device CTL, for example a laptop DV as an LMT terminal over m lines is connected downstream. With the help of the laptop DV, the Phase differences between the supply cables L1 to L4 determined.
  • the antenna arrangement is ANT as a phased array antenna arrangement with four individual antennas A1, A2, A3, A4 executed that upstream of the antenna arrangement ANT Butler Matrix BM can be controlled.
  • the sending device SE includes a COMB combiner with four outputs for feeding signals into the four supply cables L1 to L4 and four inputs for recording input signals PA1, PA2, PA3, PA4.
  • the pilot tone device PTE has a reception circuit ES connected to the pilot tone input PTI, a transmission circuit SS connected to the pilot tone output PTO, a first and a second signal processing circuit SAS1 or SAS2 and a demodulation device DEM.
  • the demodulation device DEM is via the signal conditioning circuit SAS1 with the receiving circuit ES and over the Signal conditioning circuit SAS2 with the transmission circuit SS connected.
  • a synthesizer clocked with a clock signal CLK1 SYN is used to feed a synthesizer signal into the receiving circuit ES and in the transmitting circuit SS.
  • On pseudo-noise generator clocked with the clock signal CLK1 PNG is used to feed a pseudo-noise signal into the second signal processing circuit SAS2 and in the demodulation device DEM.
  • the receiving circuit ES has a receiving mixer ESM, on the input side via a reception band pass ESBP the receiving pilot tone EP and on the other hand the synthesizer signal of the synthesizer SYN is fed and its output connected to the first signal processing circuit SAS1 is.
  • reception pilot EP In order to enable a synchronous detection of the reception pilot EP, is used for the formation of the SP pilot and for the analysis of the reception pilot EP the same synthesizer SYN used.
  • the first signal processing circuit SAS1 has a series circuit from a first amplifier V1, a first Bandpass BP1, a second amplifier V2, a limiter BG and a second bandpass BP2.
  • One from the first signal conditioning circuit SAS1 formed output signal is the first input signal to the demodulator DEM.
  • the second signal processing circuit SAS2 has a series circuit from a mixer MI, an oscillator OSZ, a Doubler VD and a bandpass BP.
  • One from the mixer MI from a signal from the oscillator OSZ and that from the pseudo-noise generator PNG supplied pseudo-noise signal first output signal is present at the transmission circuit SS.
  • One formed by the doubler VD from the signal of the oscillator OSZ The signal lies as after passing through the bandpass BP second input signal at the demodulation device DEM on.
  • the transmission circuit SS has a transmission mixer SSM, the first output signal of the mixer MI on the input side second signal processing circuit SAS2 and the synthesizer signal are fed and its output with a transmission band pass SSBP is connected. Its output signal forms the Transmission pilot tone SP.
  • the demodulation device DEM has an I / Q demodulator I / Q-DEM with two outputs I and Q, each with one Capacitor C1 or C2 to an output branch AZ1 or AZ2 are coupled for further processing of a I / Q demodulator supplied I-signal IS or Q-signal IQ.
  • the I / Q demodulator I / Q-DEM is the first input signal and the second input signal of the demodulation device DEM supplied.
  • the first and second output branches AZ1 and AZ2 of the demodulation device DEM each has an inverter INV, a switch US, a low pass TP and an analog-to-digital converter ADC on, depending on the switch US of the pseudo-noise signal controlling it, the I signal IS or the Q signal QS either via the inverter INV or directly to the low pass TP.
  • One from each Low pass TP to the corresponding analog-digital converter ADC-guided signal arrives as a digital data signal a total of n data outputs from the pilot tone device PTE.
  • the reception band pass ESBP and the transmission band pass SSBP have a pass band from 935 to 960 MHz.
  • the bandpasses BP1 and BP2 of the first signal processing circuit SAS1 have a bandwidth of 1.6 MHz.
  • the bandpass BP of the second signal processing circuit SAS2 has a pass frequency of 221 MHz.
  • the low-pass filters TP of the two output branches AZ1 and AZ2 of the demodulation device DEM have a cut-off frequency of 30 Hz.
  • the synthesizer SYN provides synthesizer signals with a frequency of 824 MHz or 850 MHz, the clock frequency CLK1 of the synthesizer SYN and the pseudo-noise generator PNG has a frequency of 1 MHz, while the signal of the oscillator OSZ has a frequency of 110.6 MHz.
  • the output signal of the reception mixer ESM advantageously has a frequency of 110.6 MHz, since there are suitable SAW filters in this frequency range.
  • the signal processed there can be limited by the limiter BG, since it is subsequently only required for a phase measurement and it is synchronously demodulated by means of the oscillator OSZ at 110.6 MHz.
  • the I / Q demodulator I / Q-DEM provided for this purpose for generating the I signal IS or the Q signal IQ as 90 ° vectors divides the frequency of the signals supplied to it, which is why a doubler VD is connected downstream of the oscillator OSZ ,
  • the transmit pilot tone SP or the receive pilot tone EP is included phase-modulated or demodulated the pseudo-noise signal. This causes a spread to approximately 1 MHz.
  • the synchronous Demodulation using the I / Q demodulator I / Q-DEM is created as the modulation signal, the I signal or the Q signal in the baseband. These two signals are capacitively coupled, to an offset caused by the I / Q demodulator eliminate. Then both output signals of the I / Q demodulator I / Q-DEM with the pseudo-noise signal via the Switch US back probed, an almost offset-free DC voltage arises.
  • any existing ones Interference signals in their frequency "wide-swept” and this with the simple low pass TP of the respective output branch AZ1 or AZ2 effectively filtered out.
  • Such a DC voltage is then generated with the help of each Analog-digital converter ADC of the two output branches AZ1 or AZ2 are converted into digital data signals that are the n data outputs of the pilot tone device PTE arrive.
  • the maximum power at the input of the antenna arrangement ANT is a level of + 42dBm. With an allowed intermodulation distance of 70 dB, this results in an intermodulation level of -28dBm. The maximum permitted level of spurious emissions is -36dBm. If 6dB is taken into account as a reserve, the realizable signal-to-noise ratio of the sending or receiving pilot is approx. -14dB.

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  • Transceivers (AREA)
  • Transmitters (AREA)
EP01123993A 2001-10-08 2001-10-08 Appareil pour l'asservissement de phase des lignes d'alimentation d'un système d'antenne avec transmission d'une tonalité pilote Expired - Lifetime EP1300909B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP01123993A EP1300909B1 (fr) 2001-10-08 2001-10-08 Appareil pour l'asservissement de phase des lignes d'alimentation d'un système d'antenne avec transmission d'une tonalité pilote
DE10149553A DE10149553C1 (de) 2001-10-08 2001-10-08 Anordnung zum Phasenabgleich von Zuleitungskabeln einer Antennenanordnung mit Hilfe eines Sendepilottons
DE50108983T DE50108983D1 (de) 2001-10-08 2001-10-08 Anordnung zum Phasenabgleich von Zuleitungskabeln einer Antennenanordnung mit Hilfe eines Sendepilottons
US10/265,907 US6753811B2 (en) 2001-10-08 2002-10-08 System for phase trimming of feeder cables to an antenna system by a transmission pilot tone

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01123993A EP1300909B1 (fr) 2001-10-08 2001-10-08 Appareil pour l'asservissement de phase des lignes d'alimentation d'un système d'antenne avec transmission d'une tonalité pilote
DE10149553A DE10149553C1 (de) 2001-10-08 2001-10-08 Anordnung zum Phasenabgleich von Zuleitungskabeln einer Antennenanordnung mit Hilfe eines Sendepilottons

Publications (2)

Publication Number Publication Date
EP1300909A1 true EP1300909A1 (fr) 2003-04-09
EP1300909B1 EP1300909B1 (fr) 2006-02-22

Family

ID=26010317

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01123993A Expired - Lifetime EP1300909B1 (fr) 2001-10-08 2001-10-08 Appareil pour l'asservissement de phase des lignes d'alimentation d'un système d'antenne avec transmission d'une tonalité pilote

Country Status (3)

Country Link
US (1) US6753811B2 (fr)
EP (1) EP1300909B1 (fr)
DE (2) DE50108983D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7482976B2 (en) * 2006-04-10 2009-01-27 Aviation Communication & Surveillance Systems Antenna calibration method and apparatus
CN101516101B (zh) * 2009-03-17 2010-10-27 华为技术有限公司 一种检测馈线连接的方法、装置及系统
EP2441186B1 (fr) * 2009-06-08 2013-08-28 Telefonaktiebolaget LM Ericsson (publ) N ud de communications sans fil et son procédé

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4532518A (en) * 1982-09-07 1985-07-30 Sperry Corporation Method and apparatus for accurately setting phase shifters to commanded values
WO1999063619A1 (fr) * 1998-06-05 1999-12-09 Metawave Communications Corporation Systeme et procede pour l'etalonnage entierement autonome d'une batterie d'antennes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739334A (en) * 1986-09-30 1988-04-19 The United States Of America As Represented By The Secretary Of The Air Force Electro-optical beamforming network for phased array antennas
US5517686A (en) * 1994-09-29 1996-05-14 Delco Electronics Corporation Diversity receiver for FM stereo utilizing a pilot tone multiple for phase alignment of received signals
US5532706A (en) * 1994-12-05 1996-07-02 Hughes Electronics Antenna array of radiators with plural orthogonal ports
GB2342505B (en) * 1998-10-06 2003-06-04 Telecom Modus Ltd Antenna array calibration
DE19925868B4 (de) * 1999-06-07 2004-10-21 Microtune Gmbh & Co. Kg Diversity-TV-Empfangssystem

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4532518A (en) * 1982-09-07 1985-07-30 Sperry Corporation Method and apparatus for accurately setting phase shifters to commanded values
WO1999063619A1 (fr) * 1998-06-05 1999-12-09 Metawave Communications Corporation Systeme et procede pour l'etalonnage entierement autonome d'une batterie d'antennes

Also Published As

Publication number Publication date
DE10149553C1 (de) 2003-05-15
US20030080900A1 (en) 2003-05-01
DE50108983D1 (de) 2006-04-27
EP1300909B1 (fr) 2006-02-22
US6753811B2 (en) 2004-06-22

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