Christian Berger, Volodymyr Arbatov, Yevgen Voronenko, Franz Franchetti and Markus Püschel (Proc. International Conference on Acoustics, Speech, and Signal Processing (ICASSP), pp. 1693-1696 , 2011)
Real-Time Software Implementation of an IEEE 802.11a Baseband Receiver on Intel Multicore
Preprint (148 KB)
Published paper (link to publisher)

We present a software-only implementation of an IEEE~802.11a (WiFi) receiver optimized for Intel multicore platforms. The receiver is about 50 times faster than a straightforward C implementation, i.e., an implementation that has the same functionality, but leaves optimization completely to the compiler. Our hand-optimized implementation achieves real-time for all data rates up to the maximum of 54 Mbit/s on a Core i7, clocked at 3.3 GHz, and for up to 12 Mbit/s on an Atom, clocked at 1.6 GHz, using two cores in both cases. To achieve this performance we use up to two threads, up to 16-way vectorization using Intel's SSE, and various other optimizations.

Multithreading, SIMD vectorization, Beyond transforms, Software defined radio (SDR)