WARP: a flexible platform for clean-slate wireless medium access protocol design
ACM SIGMOBILE Mobile Computing and Communications Review
A comparison of pilot-aided channel estimation methods for OFDMsystems
IEEE Transactions on Signal Processing
ML estimation of time and frequency offset in OFDM systems
IEEE Transactions on Signal Processing
Implementation of a MIMO OFDM-based wireless LAN system
IEEE Transactions on Signal Processing
Decoding IEEE 802.11a/g/p OFDM in software using GNU radio
Proceedings of the 19th annual international conference on Mobile computing & networking
A real-time COFDM transmission system based on the GNU radio: USRP N210 platform
Proceedings of the 8th International Conference on Ubiquitous Information Management and Communication
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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.