January 2015 doc IEEE 802 11 150121 r

January 2015 doc. : IEEE 802. 11 -15/0121 r 0 GNURadio and WLAN research Authors: Submission Date: 2015 -01 -15 Slide 1 Jim Lansford (CSR Technology)

January 2015 doc. : IEEE 802. 11 -15/0121 r 0 Abstract GNURadio and RFNo. C can be used to prototype WLAN systems. Also, a call for research topics for students Submission Slide 2 Jim Lansford (CSR Technology)

January 2015 doc. : IEEE 802. 11 -15/0121 r 0 What is GNURadio? • GNU Radio is a free software development toolkit that provides the signal processing runtime and processing blocks to implement software radios using readily-available, low-cost external RF hardware and commodity processors. It is widely used in hobbyist, academic and commercial environments to support wireless communications research as well as to implement real-world radio systems. • GNU Radio applications are primarily written using the Python programming language, while the supplied, performance-critical signal processing path is implemented in C++ using processor floating point extensions where available. Thus, the developer is able to implement real-time, high-throughput radio systems in a simple-to-use, rapid-application-development environment. Submission Slide 3 Jim Lansford (CSR Technology)

January 2015 doc. : IEEE 802. 11 -15/0121 r 0 GNURadio/Python to FPGA prototype [2] • • • Up to 61. 44 MS/s @ 12 bits (X 2) 70 -6, 000 MHz frequency span >10 d. Bm power output IIP 3: -20 d. Bm NF: <8 d. B typ GNURadio/ Python Ettus Research Submission Slide 4 Jim Lansford (CSR Technology),

January 2015 doc. : IEEE 802. 11 -15/0121 r 0 Examples of WLAN flow [1] • B 210 can run a complete 802. 11 g in PHY/MAC almost real time • E 310 can implement 40 MHZ 802. 11 n 2 x 2 MIMO in real time Submission Slide 5 Jim Lansford (CSR Technology),

January 2015 doc. : IEEE 802. 11 -15/0121 r 0 Schools that are using GNURadio/SDR [3] Submission Slide 6 Jim Lansford (CSR Technology),

January 2015 doc. : IEEE 802. 11 -15/0121 r 0 Research topics • Experimentation with WLAN MAC characteristics – Application of game theory concepts to contention window behavior • “Police scanner” functionality • Spectrum analysis/white space monitoring • Dynamic CCA (possible) – As described in 802. 11 ax presentations • Modifications to CW • Others? Note: Current Ettus SDR performance is limited to 2 x 2 MIMO, 40 MHz channels for real time implementations Submission Slide 7 Jim Lansford (CSR Technology),

January 2015 doc. : IEEE 802. 11 -15/0121 r 0 Additional research topics I have 11 students in my WLAN class this semester. They are required to do a term paper or project. • Some ideas: – Randomized Mac addresses: periodic changes to MAC addresses to enhance privacy – Simulation of WLAN-LAA coexistence – 802. 11 p (DSRC) – 802. 11 ac coexistence – Others? Submission Slide 8 Jim Lansford (CSR Technology),

May 2013 doc. : IEEE 802. 11 -15/0121 r 0 References [1] Bloessl, et al, “An IEEE 802. 11 a/g/p OFDM Receiver for GNU Radio”, SRIF '13 Proceedings of the second workshop on Software radio implementation forum, Pages 9 -16 http: //conferences. sigcomm. org/sigcomm/2013/papers/srif/p 9. pdf Fully compliant WLAN implementation in SDR. Interop testing. [2] Braun and Ettus, “RF Network-on-Chip™: Modular SDR development on FPGAs” http: //www-int. etec. unikarlsruhe. de/seiten/conferences/past/WSR 2014/Papers/wsr 14_21. pdf [3] Bilen, et al, “Software-Defined Radio: A New Paradigm for Integrated Curriculum Delivery, ” IEEE Communications Magazine, May 2014, pp. 184 -193. http: //ieeexplore. ieee. org/xpl/article. Details. jsp? arnumber=6815911 Submission Slide 9 Jim Lansford (CSR Technology)