1 RECEIVING

1.1 Hardware and Software you need

USRP B210

googleearth

gr-air-modes (https://github.com/bistromath/gr-air-modes.git)

Python >= 2.5

PyZMQ

Gnuradio >= 3.5.0 ( Reference resources：https://www.cnblogs.com/moon1992/p/5781166.html?utm_source=itdadao&utm_medium=referral)

Ettus UHD >= 3.4.0 for use with - USRPs

osmosdr (any version) for use with RTLSDR dongles

SQLite 3.7 or later

CMake 2.6 or later

1.2 Steps

1.2.1 Downloda gr-air-modes,and install with README
1.2.2 Type following commands in your command line to build up environment you will need in this Experiment

sudo apt-get update
sudo apt-get install build-essential
sudo apt-get install python-setuptools
sudo easy_install pip
sudo apt-get install libzmq-dev
sudo apt-get install python-zmq

run python and type as follow

Python 2.7.12(default,Nov 19 2016,06:48:10)
[GCC 5.4.0 20160609] on linux2
Type “help”,“copyright”,“credits” or “license” for more information.
>>>import zmq
>>>zmq.zmq_version()

1.2.3 Download googleearth
1.2.4 Link USRP B210 to you computer and makes sure your computer can detecte USRP (maybe you should update your hardware)
the following commands make your USRP hardware update(Reference resources：https://blog.csdn.net/yundanfengqing_nuc/article/details/78352804)

sudo uhd_images_downloader
uhd_usrp_probe

if you have this response, you are good to go

图片.png

1.2.5 now, you can receive ADS-B signals from air with following command.

modes_rx -A RX2 -K aircraft.kml

图片.png

This command can make collected signals into the aircraft.kml file.
let the equipment receive signal for a while and close this program.
Now you can open aircraft.kml with googleearth.

图片.png

2 BROASCAT

2.1 Hardware and Software you need

HarkRF One

googleearth

ADSB-Out-master (https://github.com/lyusupov/ADSB-Out.git)

2.2 Steps

2.2.1 Download and compile harkcrf's environment.

git clone --progress http://github.com/mossmann/hackrf.git
cd hackrf/host
mkdir build
cd build
cmake ../ -DINSTALL_UDEV_RULES=ON
make
sudo make install
sudo ldconfig

gethackrf_infoas follow

图片.png

2.2.2 Update HackRF hardware

① download hackrf-2017.02.1.tar.xz from https://github.com/mossmann/hackrf/releases
② unzip files into home catalog
③ move four files(cmak, hackrf-tools, libhackrf, CMakeLists.txt ) into hackrf-2017.02.1catalog from home catalog
④ type command as following

cd host
mkdir build
cmake ../ -DINSTALL_UDEV_RULES=ON
make
sudo make install
sudo ldconfig

⑤ get in firmware-bin catalog

hackrf_spiflash -Rw hackrf_one_usb.bin   //update SPI 
hackrf_cpldjtag -x hackrf_cpld_default.xsvf   //update  CPLD

now you can see three lights (USB、RX、TX) are twinkling, which means updating is succeed.
restart the HackRF before next step

2.2.3 Broadcast signal
get into ADSB-Out-master and type following commands one by one

ADSB_Encoder.py  0xABCDEF 12.34 56.78 9999.0   //Execute *ADSB_Encoder.py* script with `<ICAO>` `<Latitude>` `<Longtitude>` `<Altitude>` arguments:

dd if=Samples.iq8s of=Samples_256K.iq8s bs=4k seek=63  //Make the raw signal file aligned to 256K buffer size:

hackrf_transfer -t Samples_256K.iq8s -f 1090000000 -s 2000000 -x 10 -R //Transmit the signal into air:

you will see the picture in the end if you succeed.

图片.png

you also can check README to get more informations.
now you can use USRP to receive your signal and check it with googleearth.

3 Upgrade

target:

send some different signals ( different between ICAO, Latitude ,Longitude, Altitude)
deliberately.

collect signal, and select that you just broadcasted.

use googleearth confirm it.

3.1 Steps

3.1.1 Choose the different signals(change Latitude and Longitude.make sure the Altitude is still 200 to differ with normal fight)

图片.png
3.1.2 Change the original program