Proceedings ArticleDOI
An IEEE 802.11a/g/p OFDM receiver for GNU radio
Bastian Bloessl,Michele Segata,Christoph Sommer,Falko Dressler +3 more
- pp 9-16
TLDR
This work presents a complete Orthogonal Frequency Division Multiplexing (OFDM) receiver implemented in GNU Radio and fitted for operation with an Ettus USRP N210, the first prototype of a GNU Radio based OFDM receiver for this technology.Abstract:
Experimental research on wireless communication protocols frequently requires full access to all protocol layers, down to and including the physical layer. Software Defined Radio (SDR) hardware platforms, together with real-time signal processing frameworks, offer a basis to implement transceivers that can allow such experimentation and sophisticated measurements. We present a complete Orthogonal Frequency Division Multiplexing (OFDM) receiver implemented in GNU Radio and fitted for operation with an Ettus USRP N210. To the best of our knowledge, this is the first prototype of a GNU Radio based OFDM receiver for this technology. Our receiver comprises all layers up to parsing the MAC header and extracting the payload of IEEE 802.11a/g/p networks. It supports both WiFi with a bandwidth of 20 MHz and IEEE 802.11p DSRC with a bandwidth of 10 MHz. We validated and verified our implementation by means of interoperability tests, and present representative performance measurements. By making the code available as Open Source we provide an easy-to-access system that can be readily used for experimenting with novel signal processing algorithms.read more
Citations
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Proceedings ArticleDOI
Inter-Technology Backscatter: Towards Internet Connectivity for Implanted Devices
TL;DR: The inter-technology backscatter approach as discussed by the authors transforms wireless transmissions from one technology to another, on the air, by backscattering Bluetooth transmissions to create Wi-Fi and ZigBee-compatible signals.
Posted Content
Inter-Technology Backscatter: Towards Internet Connectivity for Implanted Devices
TL;DR: Inter-technology backscatter is introduced, a novel approach that transforms wireless transmissions from one technology to another, on the air, thus enabling the vision of Internet connected implanted devices.
Proceedings ArticleDOI
Demo: WEBee: Physical-Layer Cross-Technology Communication via Emulation
TL;DR: The comprehensive evaluation reveals that WEBee can achieve a more than 99% reliable parallel CTC between WiFi and ZigBee with 126 Kbps in noisy environments, a throughput about 16,000x faster than current state-of-the-art CTCs.
Proceedings ArticleDOI
Why MAC Address Randomization is not Enough: An Analysis of Wi-Fi Network Discovery Mechanisms
TL;DR: This work presents several novel techniques to track (unassociated) mobile devices by abusing features of the Wi-Fi standard, and shows that using random MAC addresses, on its own, does not guarantee privacy.
Proceedings ArticleDOI
Exposing the Fingerprint: Dissecting the Impact of the Wireless Channel on Radio Fingerprinting
Amani Al-Shawabka,Francesco Restuccia,Salvatore D'Oro,Tong Jian,Bruno Costa Rendon,Nasim Soltani,Jennifer G. Dy,Stratis Ioannidis,Kaushik R. Chowdhury,Tommaso Melodia +9 more
TL;DR: Experimental results conclude that the wireless channel impacts the classification accuracy significantly, and equalizing I/Q data can increase the accuracy to a significant extent when the number of devices increases significantly.
References
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Journal ArticleDOI
Robust frequency and timing synchronization for OFDM
T.M. Schmidl,Donald C. Cox +1 more
TL;DR: A rapid synchronization method is presented for an orthogonal frequency-division multiplexing (OFDM) system using either a continuous transmission or a burst operation over a frequency-selective channel.
Journal ArticleDOI
ML estimation of time and frequency offset in OFDM systems
TL;DR: In this paper, the joint maximum likelihood (ML) symbol-time and carrier-frequency offset estimator is presented for orthogonal frequency-division multiplexing (OFDM) systems.
Journal ArticleDOI
A comparison of pilot-aided channel estimation methods for OFDM systems
M. Morelli,U. Mengali +1 more
TL;DR: Two pilot-aided schemes for the estimation of the channel impulse response (CIR) in orthogonal frequency division multiplexed (OFDM) systems are focused on: the maximum likelihood estimator (MLE) and the Bayesian minimum mean square error estimators (MMSEE).
Journal ArticleDOI
Implementation of a MIMO OFDM-based wireless LAN system
A. van Zelst,T.C.W. Schenk +1 more
TL;DR: The complete MIMO OFDM processing is implemented in a system with three transmit and three receive antennas, and its performance is evaluated with both simulations and experimental test results.
Proceedings ArticleDOI
A computationally inexpensive empirical model of IEEE 802.11p radio shadowing in urban environments
TL;DR: An empirical model for modeling buildings and their properties to accurately simulate the signal propagation for IEEE 802.11p radio shadowing in urban environments is created and results show a very high accuracy when compared with the measurement results.