Field Programmable Gate Array(FPGA) Application In Instrument Landing-is the system where an aircraft landing automatically to the runway selected. The system will catch to glideslope and and localize
Field Programmable Gate Array(FPGA) Application In Instrument Landing System(ILS)
1. FIELD PROGRAMMABLE GATE
ARRAY(FPGA) APPLICATION IN
INSTRUMENT LANDING
SYSTEM(ILS)
BDU10803
ELECTRICAL AND ELECTRONICS TECHNOLOGY
Dr. Afandi bin Ahmad
Muhammad Hazwan bin Ab Rashid AD110095
Amal Iqmal bin Adnan AD110189
Mohamad Irfan bin Azmi AD110169
2. CONTENT
1. Field Programmable Gate Array (FPGA)
1.1 What is FPGA?
1.2 Vendors of FPGA Device
1.3 FPGA product
2. Introduction & Components of Instrument Landing
System (ILS)
2.1 Ground Equipment
2.1.1 Localizer
2.1.2 Glide slope
2.1.3 Marker Beacon
2.1.4 Monitoring
2.2 Airborne Equipment
2.2.1 Receiver
2.2.2 Aerial
2.2.3 Instrumentation
3. How does it works
3. 1. FIELD PROGRAMMABLE GATE-
ARRAY (FPGA)
An integrated circuit (IC) that can be configured by a
customer after manufacturing to program the system.
Contain programmable logic components called "logic blocks",
and interconnects.
FPGA chips handle dense logic and memory elements
offering very high logic capacity
Can be configurable without change their hardware
Vendors:
Xilinx, Altera, Actel
FPGA product
Xilinx Virtex-7 FPGA, Spartan-6 LXT FPGA & Stratix V from
Altera
4. 2. Introduction & Components of
Instrument Landing System (ILS)
o Is an instrument aid for pilot during landing.
o Very useful when limited visibility occur at
runway.
6. • Provide horizontal
course guidance to
runway centerline.
GROUND
• Localizer, glide
slope and marker EQUIPMENT •Provides vertical
beacon being alignment and angle of
monitored. approach.
10. •Receive radio
frequency from ground
AIRBORNE
EQUIPMENT
•ILS indicator to •To detect radio
easy view of pilot frequency
about the system
11. ADC DSP (Digital
FPGA (Analog to Signal
Digital) Processing)
Read result
Aircraft start to
AM & FM
descend though GS
and centerline to
the runway
Localizer &
Glide
Slope(GS)
Antenna
ILS start Pilot set
transmit
working ILS
frequency
The design relies on Digital Signal Processing (DSP) and FPGA processing units to monitor all parameters of the transmitted signals in real-time Interconnects-allow the blocks to be connect together in many different configurations.
Glide path, provides vertical alignment and angle of approach -Glide path information is paired with the associated localizer frequency. -The antenna array is located approx. 1000ft from the approach end of the runway and offset approx. 400ft. -Marker Beacons to identify particular locations along the approach
ILS is the devices that generate signals or transmits signal to runway and then, analog system input to DSP part is converted to digital signal by FPGA This signal then will demodulated by (Analog to Digital) converter. Then (DSP) will find phase difference by reading result of Amplitude Modulation (AM) and Frequency Modulation (FM) saved in FPGA memory. In addition ,every runway have different ILS frequency. An airplane can achieved the ILS by setting the same frequency as the runway. So, when a pilot is setting the specific frequency on the instruments which is the runway frequency, then the airplane will navigate to the follow ILS which is the same frequency to the runway. The airplane will centerline to the runway until it reach to the glide slope (GS) which is maximum height for ILS. Above than that, the ILS frequency will disturb. After it pass through the gs the airplane strt to descend. An Analog-to-Digital converter ( ADC ) takes the analog signal and converts it into a binary language the software can understand. The Digital Signal Processor ( DSP ) manipulates the digital signals to perform the required functions. Digital-to-Analog Converter ( DAC ) takes the computer signal and converts it into something that other parts of the radio hardware and humans can understand. Radio Frequency ( RF ) is the range of frequencies that are used in radio communications -every runway have specific frequency-stb is place where fpga is located that monitor the system- -at 18nm-set frequency to ils fre-then,airplane will nav to ils fre-at about 9nm,the airplane is strt to descend at gs-while to centerline to the runway- - VHF transmits radar signal and intensity data to ILS Signal Deciphering and Display Computer. - Localizer signal transmitted in direction opposite of runway to horizontally guide aircraft to touchdown point. - Glide-Slope signal transmitted at an angle of 7.5-10 degrees into sky to define vertical descent path to runway touchdown point. - On-board antenna system located in aircraft radome receives radar and VHF signals and sends it to on-board ILS computer. -Signal data is then displayed on instrument panel gauge which maps the directional, and descent path to the runway.
-at 18nm-set frequency to ils fre-then,airplane will nav to ils fre-at about 9nm,the airplane is strt to descend at gs-while to centerline to the runway- - VHF transmits radar signal and intensity data to ILS Signal Deciphering and Display Computer. - Localizer signal transmitted in direction opposite of runway to horizontally guide aircraft to touchdown point. - Glide-Slope signal transmitted at an angle of 7.5-10 degrees into sky to define vertical descent path to runway touchdown point. - On-board antenna system located in aircraft radome receives radar and VHF signals and sends it to on-board ILS computer. -Signal data is then displayed on instrument panel gauge which maps the directional, and descent path to the runway.
The transmitters are located on the centerline at the opposite end of the runway from the approach threshold. The signal transmitted consists of two fan shaped patterns that overlap at the centre. The overlap area provides the on-track signal. -Normal reliable coverage of localizers is 18nm within 10° of either side of course centerline and 10nm within 35°.