On Wed, Jun 22, 2011 at 07:59:40PM -0400, Tom Rondeau wrote: > Martin, > > That is fantastic works! Thanks for putting it out there! > > I have a question on the channel coding work done. Was there any benchmarking > performed on it to test the throughput speed? Also, is there any SIMD code > used > to improve the performance? If not, I wonder how difficult it might be to use > Volk functions for that? > > Thanks again!
Hi Tom and everyone, some basic benchmarks were done (if your interested in the details, see pp59 in the included PDF. You'll find the specs of the test system there. Figure 5.2 is memory usage in bits, Figure 5.4 is the average time to encode one information bit in µs, Figure 5.6 is the average CPU load when transmitting 100 kbit/s (goodput). Way more interesting is the decoding: Figure 5.7 is the average decoding time needed to decode one code bit. Figure 5.9 shows achievable bit rates on the given system). As for SIMD code and Volk: Nope, we've done nothing here. But it's a good point. In particular, the Fast Hadamard Transform was implemented as part of this toolbox, and I guess that alone could be optimized a great deal. I'll look into it... could be interesting. Thanks for the feedback! MB -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association
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