# bladeRF VHDL ADS-B decoder core
![bladeRF-adsb](https://raw.githubusercontent.com/Nuand/bladeRF-adsb/master/images/bladerf_adsb.png)
dump1090 visualizing the output of the bladeRF ADS-B VHDL decoder.
This repository contains all of the neccessary files to simulate, and build the ADS-B core. A multipart tutorial series detailing the implementation of the ADS-B core can be found [here](http://nuand.com/adsb).
# Theory of operation
The ADS-B decoder decodes signals directly in the FPGA as opposed to on a CPU. The hardware acceleration gains are used to increase the range of the ADS-B receiver by performing operations that could not run in realtime even on a recent Intel i7. The decoder attempts to detect and resolve many bit errors and correct for packet collisions; features that up until now have only been available in commercial ADS-B decoders.
The ADS-B decoder runs on the FPGA, and sends fully decoded messages whose CRC pass to libbladeRF. The bladeRF-adsb user-mode utility that is found in this repository takes the decoded messages and sends them to a dump1090 server listening on port 30001. dump1090 can then be used to visualize the location of planes (as can be seen in the screenshot above).
The decoder runs on any bladeRF including the [bladeRF x40](https://www.nuand.com/blog/product/bladerf-x40/) and [bladeRF x115](https://www.nuand.com/blog/product/bladerf-x115/). Any low noise amplifier works with the bladeRF, however there is a bladeRF specific LNA available, the [XB-300](https://www.nuand.com/blog/product/amplifier/).
# Installation
## Install libbladeRF and bladeRF-cli.
The bladeRF project repository, [https://github.com/Nuand/bladeRF](bladeRF), contains [installation guides](https://github.com/Nuand/bladeRF/wiki#Getting_Started) for most operating systems.
## Install and run dump1090-mutability
````
$ git clone https://github.com/mutability/dump1090.git
$ cd dump1090
$ make
$ ./dump1090 --net-only --raw --interactive
````
More information about dump1090 can be found on the [project's Github](https://github.com/mutability/dump1090.git).
Once dump1090 is running visit the HTTP server setup by dump1090 at [http://localhost:8080](/http://localhost:8080/)
## Fetch latest source and bitstreams, and run bladeRF-adsb
````
$ git clone https://github.com/Nuand/bladeRF-adsb
$ cd bladeRF-adsb/bladeRF_adsb
$ wget http://nuand.com/fpga/adsbx40.rbf
$ wget http://nuand.com/fpga/adsbx115.rbf
$ make
$ ./bladeRF_adsb
````
This will compile and run the user-mode utility that interfaces with the VHDL decoder. The user-mode program loads the prebuilt ADS-B decoder FPGA image. As soon as a message is received from the FPGA it is displayed to the command line and also transmitted to dump1090 for visualization. Once messages get displayed in the command line, they will appear on the local dump1090 HTTP server.
# Building ADS-B image
The ADS-B decoder is a core that substantially modifies the operation of the bladeRF FPGA. The core has its own FPGA revision called "adsb" separate from the normal "hosted" image. To compile the core, fetch a recent snapshot of the existing bladeRF repository. Afterwards, clone this repository in to hdl/fpga/ip/nuand.
````
$ git clone http://github.com/Nuand/bladeRF.git
$ cd bladeRF
$ cd hdl/fpga/ip/nuand
$ git clone http://github.com/Nuand/bladeRF-adsb.git adsb
````
Once the repository is setup, use the standard [FPGA build directions](https://github.com/Nuand/bladeRF/tree/master/hdl) to build the ADS-B decoder image.
````
$ ./build_bladerf.sh -r adsb -b bladeRF -s 40
````
And if building for an x115,
````
$ ./build_bladerf.sh -r adsb -b bladeRF -s 115
````
And for the bladeRF 2.0 micro,
````
$ ./build_bladerf.sh -r adsb -b bladeRF-micro -s A4
$ ./build_bladerf.sh -r adsb -b bladeRF-micro -s A5
$ ./build_bladerf.sh -r adsb -b bladeRF-micro -s A9
````
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BladeRF ADS-B硬件解码器_VHDL_代码_相关文件_下载
共31个文件
vhd:18个
c:4个
h:2个
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dump1090 可视化 BladeRF ADS-B VHDL 解码器的输出。 此存储库包含模拟和构建 ADS-B 内核所需的所有文件。可在此处找到详细说明 ADS-B 内核实现的多部分教程系列。 操作原理 ADS-B 解码器直接在 FPGA 中解码信号,而不是在 CPU 上。硬件加速增益用于通过执行即使在最近的 Intel i7 上也无法实时运行的操作来增加 ADS-B 接收器的范围。解码器尝试检测和解决许多比特错误并纠正数据包冲突;迄今为止,这些功能仅在商业 ADS-B 解码器中可用。 ADS-B 解码器在 FPGA 上运行,并发送完全解码的消息,其 CRC 传递给 libbladeRF。在此存储库中找到的 BladeRF-adsb 用户模式实用程序获取解码的消息并将它们发送到侦听端口 30001 的 dump1090 服务器。然后可以使用 dump1090 可视化飞机的位置(如上面的屏幕截图所示) )。 解码器在任何刀片RF 上运行,包括刀片RF x40和刀片RF x115。 更多详情、使用方法,请下载后阅读README.md文件
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bladeRF-adsb-master.zip (31个子文件)
bladeRF-adsb-master
bladeRF_adsb
bladeRF_adsb.c 10KB
Makefile 155B
images
bladerf_adsb.png 360KB
vhdl
adsb_decoder.vhd 4KB
preamble_detector.vhd 10KB
bsd_calculator.vhd 5KB
bit_flipper.vhd 6KB
adsb_edge_detector.vhd 4KB
tb
adsb_edge_detector_tb.vhd 2KB
edge_detector_tb.vhd 2KB
adsb_tb.vhd 5KB
smallest_bsds_tb.vhd 3KB
adsb_crc_tb.vhd 2KB
preamble_detector_tb.vhd 1KB
adsb_decoder_p.vhd 233B
adsb_fe.vhd 6KB
message_decoder.vhd 4KB
edge_detector.vhd 4KB
adsb_crc.vhd 5KB
message_aggregator.vhd 4KB
smallest_bsds.vhd 4KB
quartus
adsb_decoder.qip 1KB
modelsim
compile.do 876B
matlab
adsb_out.m 11KB
LICENSE 1KB
c
cnutil.h 577B
cnutil.c 2KB
main.c 6KB
adsb.c 22KB
adsb.h 1KB
README.md 4KB
共 31 条
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