Paper Info
Title
Decoding IEEE 802.11a/g/p OFDM in software using GNU radio
Abstract
We just released an Open Source receiver that is able to decode IEEE 802.11a/g/p Orthogonal Frequency Division Multiplexing (OFDM) frames in software. This is the first Software Defined Radio (SDR) based OFDM receiver supporting channel bandwidths up to 20MHz that is not relying on additional FPGA code. Our receiver comprises all layers from the physical up to decoding the MAC packet and extracting the payload of IEEE 802.11a/g/p frames. In our demonstration, visitors can interact live with the receiver while it is decoding frames that are sent over the air. The impact of moving the antennas and changing the settings are displayed live in time and frequency domain. Furthermore, the decoded frames are fed to Wireshark where the WiFi traffic can be further investigated. It is possible to access and visualize the data in every decoding step from the raw samples, the autocorrelation used for frame detection, the subcarriers before and after equalization, up to the decoded MAC packets. The receiver is completely Open Source and represents one step towards experimental research with SDR.
Year
DOI
Venue
2013
10.1145/2500423.2505300
MobiCom
Keywords
Field
DocType
decoding ieee,p ofdm,software defined radio,gnu radio,decoding step,p frame,decoded mac packet,open source,p orthogonal frequency division,ofdm receiver,decoded frame,mac packet,open source receiver,ofdm,receiver
Frequency domain,IEEE 802.11a-1999,Equalization (audio),Computer science,Software-defined radio,Network packet,Real-time computing,Software,Decoding methods,Orthogonal frequency-division multiplexing
Conference
Citations 
PageRank 
References 
3
0.43
5
Authors
4
Name
Order
Citations
PageRank
Bastian Bloessl112914.49
Michele Segata222018.68
Christoph Sommer3658.28
Falko Dressler42233201.66