Cooperatve Signal Processing

8/18/2019 Cooperatve Signal Processing

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COOPERATIVE SIGNAL PROCESSINGBEACON TRANSPONDER


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NECESSITY There are various techniques to transmit data inthe

form of signals. Data can be transmitted bywired means or wirelessly.

Coo erative signal rocessing is one of the

techniques which enhances the signal androcesses


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COOPERATIVE SIGNAL PROCESSING

Cooperation happens when a direct communication between a source (S) and a destination

(D) is improved due to the help provided by a neighboring node. This neighboring node is denoted as a relay

(R), when he has no data of its own to transmit, or it can be a node that has data of its own to transmit but it

can also help with the communication between S and D. The later case is also nown as user cooperation.


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!eacon Trans onder" beacon is an intentionally cons iciousdevice designed to attract attention to as eci#c location.!eacons hel guide navigators to theirdestination. Ty es of navigational beaconsinclude radar re$ectors% radio beacons sonicand visual signals.


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!eacon Trans onder&Transmitter


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!eacon Trans onder

'eceiver


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INT'(D)CTI(NATC Transponder The navigation system which uses ulse system.Develo ed as '"D"' Devices to identify aircrafts.

collision avoidance systems have been develo edto use trans onder transmissions as means.) on request% the ilot can relay osition andaltitude to "TC centre through +,-.

The "TC centre uses a ground based radarsurveillance to automatically monitor the locationof all aircrafts within control area.


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T'"NS (NDE'S! transponder short"for trans mitter"res ponder

electronic device that produces a response when

it receives a radio"fre#uency interrogation.!ircraft have transponders to assist inidentifying them on air traffic control radar $ andcollision avoidance systems have beendeveloped to use transponder transmissions as ameans of detecting aircraft at ris of collidingwith each other.

https://en.wikipedia.org/wiki/Radarhttps://en.wikipedia.org/wiki/Airborne_Collision_Avoidance_Systemhttps://en.wikipedia.org/wiki/Airborne_Collision_Avoidance_Systemhttps://en.wikipedia.org/wiki/Radar


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'INCI /E (- "TC T'"NS (NDE'


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There are two ty es of 'SS at each "TC Trans onder ground stationI. rimary Surveillance 'adar 0 S'1II. Secondary Surveillance 'adar 0SS'1

. rimary Surveillance 'adar 0 S'1•. rinci le2 Transmission and 'e$ection

beam•. Distance measurement•. rovide "TC ground station o erator on

surveillance radar sco e


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rimary Surveillance 'adar 0 S'1


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Secondary Surveillance 'adar 0SS'1Principle: Transmission of interro ation si nal to !eacoTransponder actionRadarscope response accordin to sit"ationNo ATC repl#Ordinar# ATC repl#


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Ty ical I

dis lay


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C(3 (NENTS Transmitter2 I3 "TT Diode (scillator

'eceiver2 4)NN Diode


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Secondary surveillance radar 0SS'1 is referred toas 5secondary5% to distinguish it from the 5 rimaryradar5 that wor6s by assively re$ecting a radiosignal o7 the s6in of the aircraft. rimary radardetermines range and bearing to a target withreasonably high #delity% but it cannot determinetarget elevation 0altitude1 reliably e8ce t at closerange. SS' uses an active trans onder 0beacon1 to

transmit a res onse to an interrogation by asecondary radar. This res onse most often includesthe aircraft9s ressure altitude and a :&digit octal identi#er. ;=

https://en.wikipedia.org/wiki/Pressure_altitudehttps://en.wikipedia.org/wiki/Octalhttps://en.wikipedia.org/wiki/Transponder_(aeronautics)https://en.wikipedia.org/wiki/Transponder_(aeronautics)https://en.wikipedia.org/wiki/Transponder_(aeronautics)https://en.wikipedia.org/wiki/Octalhttps://en.wikipedia.org/wiki/Pressure_altitude


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3(DES (-

T'"NS (NDE'S Trans onders generally de end on their modety es. The modes of o eration de end on whetherthey wor6 under rimary surveillance radar orSecondary surveillance radar0SS'1


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?hy !eacon Trans onder The beacon trans onder requires low costbeacon com onents that rovide a target li6esignal for a ma8imum range of @ miles invarious weather conditions when they areilluminated by air ort surface detectionradars./ow cost digital logic techniques are usedinstead of analog techniques for isolation ofreceiver.


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"dvantages/ow cost

,igh out ut owerCan access multi le nodes at a time.4ood Signal to Noise 'atio0SN'1.


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Cooperatve Signal Processing