WO1992018917A1 - Systeme modulaire de gestion de frequences - Google Patents

Systeme modulaire de gestion de frequences Download PDF

Info

Publication number
WO1992018917A1
WO1992018917A1 PCT/AU1992/000174 AU9200174W WO9218917A1 WO 1992018917 A1 WO1992018917 A1 WO 1992018917A1 AU 9200174 W AU9200174 W AU 9200174W WO 9218917 A1 WO9218917 A1 WO 9218917A1
Authority
WO
WIPO (PCT)
Prior art keywords
management system
sub
task
systems
parameters
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.)
Ceased
Application number
PCT/AU1992/000174
Other languages
English (en)
Inventor
George Frederick Earl
Bruce Donald Ward
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.)
Australian Government
Original Assignee
Australian Government
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 Australian Government filed Critical Australian Government
Priority to AU16694/92A priority Critical patent/AU652249B2/en
Publication of WO1992018917A1 publication Critical patent/WO1992018917A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/42—Diversity systems specially adapted for radar
    • 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
    • G01S13/86—Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Program-control systems
    • G05B19/02—Program-control systems electric
    • G05B19/04—Program control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Program control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0421—Multiprocessor system

Definitions

  • This invention relates to a transmission characteristic management system for systems which rely on high frequency radiowave propagation through the ionosphere including over-the-horizon radar, high frequency communications and high frequency direction finding.
  • the invention also relates to a method of operation of a frequency management system.
  • Real time transmission and reception characteristic or parameter management is a vital element in the effective operation of systems which rely on high frequency radiowave propagation through the ionosphere such as an over-the-horizon backscatter radar system.
  • a transmission characteristic management system may include one or more sub-systems for determining ionosphere backscatter, vertical and oblique incidence sounding, high frequency spectral surveillance, background noise, passive channel evaluation, measurement of vertical angle of arrival and a low powered backscatter radar. By the use of these various parameters the transmission characteristic management system may set up the transmitters and receivers for the type of equipment discussed above such as over-the- horizon radar to give the best results.
  • This present invention provides an arrangement by which a central processing unit can more effectively determine the necessary parameters for a particular task or at least provides the public with a useful alternative.
  • the invention is said to reside in a modular transmission and reception paramater management system comprising a management system computer to process a task and to provide a transmission and/or reception unit with the necessary task parameters for that task, the management system computer being adapted to poll a plurality of sub ⁇ systems to obtain setting parameters to determine the task parameters, each of the sub-systems being adapted to obtain and process a set of particular setting parameters and to maintain a register of the particular setting parameters such that the management system computer may poll them as necessary.
  • each of the sub-systems. may have the necessary equipment to do an entire one of the tasks.
  • each sub-system may have radio frequency equipment to carry out the obtaining of the necessary data, analogue to digital convenors, array processors and host processors to process the raw data which has been obtained with the RF equipment and to maintain a register for the data such that this data can be obtained by the management system computer as necessary.
  • each of the sub-systems may be connected to the management system computer by means of a local area network.
  • Each of the sub-systems need only have the particular componentry necessary to process its particular task and to provide a storage for the information obtained and the individual sub-systems may have all the time necessary to do their job without interference from other parts of the system. This is particularly useful where the different tasks have different execution time At all times however each of the subsystems will have its most recently obtained data available for polling by the management system computer.
  • the invention may be said to reside in an over-the-horizon radar including a modular transmission and reception paramater management system comprising a management system computer to process an over-the-horizon radar task and to provide a transmission and/or reception unit with the necessary task parameters for that task, the management system computer being adapted to poll a plurality of sub-systems to obtain setting parameters to determine the task parameters, each of the sub-systems being adapted to obtain and process a set of particular setting parameters and to maintain a register of the particular setting parameters such that the management system computer may poll them as necessary.
  • a modular transmission and reception paramater management system comprising a management system computer to process an over-the-horizon radar task and to provide a transmission and/or reception unit with the necessary task parameters for that task, the management system computer being adapted to poll a plurality of sub-systems to obtain setting parameters to determine the task parameters, each of the sub-systems being adapted to obtain and process a set of particular setting parameters and to maintain a register of the particular setting parameters such that the management system computer may poll
  • the invention is said to reside in a method of operating a frequency management system in an over-the-horizon radar comprising determining a set of task parameters for a particular task including determining the value of each of the task parameters in a separate sub ⁇ system adapted particularly for determining the value of that task parameter, holding the value of each of the parameters in its respective sub-system, and polling each of the sub-systems by a management system as and when the value of that parameter is required.
  • the management system can proceed with the task of frequency management while each of the sub-systems determines the value of its respective parameter and has this available for use by the management system.
  • each of the sub-systems and the number of sub ⁇ systems will be dependant on the functions carried out by the management system computer and for instance in an over-the-horizon radar system there may be six sub-systems as follows.
  • a first sub-system may be a backscatter sounder.
  • the backscatter sounder is used to gain an appraisal of propagation conditions in a general direction of interest over the complete span of the HF band.
  • it may employ a high power frequency modulating continuous array of signals radiated from the transmitter site. After propagation via the ionosphere, scattering from the earth's surface and return via a second ionospheric reflection the signals are received at the receiver site and de-ramped appropriately. Further processing produces a display of propagation delay or group range against transmitted frequency.
  • the digitised data contains information on the return power for the continuum of scatter ers in range. This data is then stored as discussed above so that the management system can poll this information as required.
  • a second sub-system may be an oblique incidence sounder.
  • the oblique incidence sounder employs a low to medium power frequency modulated continuous wave signal radiated from a remote site. After propagation via the ionosphere the signals received on the appropriate beam of the directional array at the receiver site. Following de-ramping and processing the power spectra relating to each integration period are associated with and plotted against a single transmitted frequency. The resulting display of group range power with changing frequency will show traces corresponding to the various modes of propagation possible over the circuit. Any number of oblique sounders may be used and for instance up to three oblique sounders may be incorporated into each over-the-horizon radar system.
  • the oblique incidence sounder data may be used for mode recognition, estimation of reflection height and co-ordinate registration of targets. Once again the data is stored in the sub-system and available for polling from the management system computer.
  • a third sub-system may be a channel occupancy surveillance sub-system.
  • the high frequency channel occupancy surveillance system is required to monitor activity across the high frequency spectrum to identify unoccupied frequency channels and then to have this information available for polling.
  • a fourth sub-system may be a background atmospheric noise detector which is used to measure the background atmospheric noise levels in selected unoccupied channels and then to have this information available for polling.
  • a fifth sub-system may be a mini-radar sub system.
  • the mini-radar as the name implies is a reduced version of the main over-the-horizon radar system with limits on array size and power transmission. It radiates over a beam with equivalent to the complete radar coverage and receives on a beam similar to a radar transmit beam.
  • the mini-radar can provide information on the doppler profile of their returned energy. This is achieved by sampling data synchronously with the swept wave form and forming a two dimensional spectral analysis.
  • the result is a display of clutter power as a function of range and doppler.
  • the level of transmitter power and the receive system sensitivity result in a system below the threshold of capability to detect targets. However, it can provide useful information regarding ionospheric behaviour and surface scattering conditions in doppler processed space. Once again this information is available for polling from the radar management system computer.
  • a sixth sub-system may be a passive channel evaluation sub-system.
  • the passive channel evaluation system operates as a mini-radar without a transmitter.
  • the results obtained from a passive channel evaluation system provide a view of range doppler space showing background levels without any reference signal.
  • the system is required to measure the radio frequency interference and noise environment of clear channels and subject them to the same resolution and processing as for the radar in order to identify the most suitable channel for radar operation.
  • the information obtained by the passive channel evaluation sub-system is also available for polling from the radar management system computer.
  • the radar management system computer can proceed with its main task of task parameter determination in real time. For a particular application a selection of the various sub-systems may be used as necessary and the management system computer can be set up to use the information provided to determine propagation characteristics.
  • this invention provides a modular transmission characteristic management system for systems which use high frequency propagation to the ionosphere such as an over-the-horizon radar which enables sounding data such as backscatter, oblique and vertical incidence and the like to be collected by various sub-systems and the results of the processing of each of these signals being available to a task processor which determines the various characteristics at which a transmitter and receiver must be set for best efficiency.
  • the most recent data from each of the sub-systems may be used to calculate settings which may in some cases change by a timescale of minutes so that real time processing is possible.
  • the drawing, Figure 1 shows a block diagram of an over-the-horizon radar system which includes the parameter determination system of the present invention.
  • the radar apparatus 1 is managed by a radar management computer 2. Signals from the radar apparatus are processed in the radar signal processing block 3 and the particularly required signals are transferred to the detection and tracking block 4 for detection and tracking of required targets.
  • Each of the detection tracking sub-systems (D/T) 5 can be set to follow a particular target or to carry out a particular task.
  • the radar management computer 2 requires the values of particular parameters such as optimum transmission frequency for the performance of a particular task. For this purpose the radar management computer 2 can poll each of the management sub-systems 7, 8, 9, 10, 11 , and 12 for the particular value or values determined by that sub-system. Each sub-system then holds the value or values for polling by the radar management computer.
  • a display 6 is provided on the radar management computer 2 to show the task and parameters of that task presently being processed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Automation & Control Theory (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

On décrit un système modulaire de gestion de caractéristiques d'émission comprenant un ordinateur du système de gestion (2), qui traite une tâche et fournit à une unité d'émission et/ou de réception (1) les paramètres nécessaires concernant cette tâche. L'ordinateur du système de gestion est conçu pour interroger une pluralité de sous-systèmes (7 à 12) pour obtenir des paramètres de réglage afin de pouvoir déterminer les paramètres de tâche, chacun des sous-systèmes (7 à 12) étant conçu pour obtenir et traiter une série de paramètres de réglage spécifiques et pour maintenir un registre des paramètres de réglage spécifiques de manière que l'ordinateur du système de gestion (2) puisse les interroger en fonction des besoins.
PCT/AU1992/000174 1991-04-19 1992-04-16 Systeme modulaire de gestion de frequences Ceased WO1992018917A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU16694/92A AU652249B2 (en) 1991-04-19 1992-04-16 Modular frequency management system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPK587791 1991-04-19
AUPK5877 1991-04-19

Publications (1)

Publication Number Publication Date
WO1992018917A1 true WO1992018917A1 (fr) 1992-10-29

Family

ID=3775377

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1992/000174 Ceased WO1992018917A1 (fr) 1991-04-19 1992-04-16 Systeme modulaire de gestion de frequences

Country Status (1)

Country Link
WO (1) WO1992018917A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995001576A1 (fr) * 1993-07-02 1995-01-12 Daimler-Benz Aerospace Ag Systeme de reconnaissance radio
US5612708A (en) * 1994-06-17 1997-03-18 Hughes Electronics Color helmet mountable display

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989006010A1 (fr) * 1987-12-17 1989-06-29 Square D Company Procede et dispositif de communication de donnees en temps reel entre une unite logique programmable de commande et un programme dans une unite centrale de commande
EP0331551A2 (fr) * 1988-02-26 1989-09-06 April S.A. Automate programmable par langage structuré
JPH0221306A (ja) * 1988-07-11 1990-01-24 Mitsubishi Electric Corp プログラマブルコントローラ
DE3938308A1 (de) * 1988-11-21 1990-05-23 Mycom Kk Programmierbare logische schaltung
US4947314A (en) * 1987-05-21 1990-08-07 Kabushiki Kaisha Toshiba Operation control system
EP0419721A1 (fr) * 1989-09-29 1991-04-03 Siemens Aktiengesellschaft Système de communication pour automates programmables reliés entre eux

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4947314A (en) * 1987-05-21 1990-08-07 Kabushiki Kaisha Toshiba Operation control system
WO1989006010A1 (fr) * 1987-12-17 1989-06-29 Square D Company Procede et dispositif de communication de donnees en temps reel entre une unite logique programmable de commande et un programme dans une unite centrale de commande
EP0331551A2 (fr) * 1988-02-26 1989-09-06 April S.A. Automate programmable par langage structuré
JPH0221306A (ja) * 1988-07-11 1990-01-24 Mitsubishi Electric Corp プログラマブルコントローラ
DE3938308A1 (de) * 1988-11-21 1990-05-23 Mycom Kk Programmierbare logische schaltung
EP0419721A1 (fr) * 1989-09-29 1991-04-03 Siemens Aktiengesellschaft Système de communication pour automates programmables reliés entre eux

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, P1030, page 89; & JP,A,2 021 306 (MITSUBISHI ELECTRIC CORP), 24 January 1990. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995001576A1 (fr) * 1993-07-02 1995-01-12 Daimler-Benz Aerospace Ag Systeme de reconnaissance radio
US5612708A (en) * 1994-06-17 1997-03-18 Hughes Electronics Color helmet mountable display

Similar Documents

Publication Publication Date Title
US6081220A (en) Radar system for observing weather phenomena with improved radar system parameters
US8203486B1 (en) Transmitter independent techniques to extend the performance of passive coherent location
US5768131A (en) Computerised radar process for measuring distances and relative speeds between a vehicle and obstacles located in front of it
DE69128734T2 (de) Polystatisches Korrelationsradar
US5252980A (en) Target location system
US6792058B1 (en) Digital receiving system for dense environment of aircraft
US5659520A (en) Super short baseline navigation using phase-delay processing of spread-spectrum-coded reply signals
EP1901087B1 (fr) TCAS distribué et à câble réduit
US5262785A (en) Small target doppler detection system
CA2479463C (fr) Systeme et procede de calcul et de reconnaissance de signature cible
US10025890B2 (en) Phase noise simulation model for pulse doppler radar target detection
US12153125B2 (en) Radar system and method for performing direction of arrival estimation in a radar system
US9213095B2 (en) Combined direction finder and radar system, method and computer program product
EP1384092B1 (fr) Systeme et procede de detection et d'extraction de caracteristiques dans un emplacement coherent passif
CN101960327A (zh) 改进地借助于二次雷达信号执行方向估计和解码的装置和方法
US5572213A (en) Parameter encoder architecture
US6801156B1 (en) Frequency-agile monopulse technique for resolving closely spaced targets
CN112634566A (zh) 基于毫米波的智能电子围栏构建方法及系统
US5017921A (en) Radar system and a method for operating a radar system
EP1896869B1 (fr) Systeme radar et procede de reduction d'echos parasites dans un environnement a echos parasites eleves
US5546089A (en) Optical monopulse chirp processor
Luce et al. Experimental results on RIAS digital beamforming radar
Reising et al. GESTRA-upgrading to future distributed phased array radar networks for space surveillance
RU2240576C2 (ru) Способ обнаружения и определения местоположения воздушных объектов
WO1992018917A1 (fr) Systeme modulaire de gestion de frequences

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU CA JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU MC NL SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: CA

122 Ep: pct application non-entry in european phase