On Fri, Nov 01, 2013 at 07:23:33PM -0700, Yingjie Chen wrote: > Recently, I have conducted a project based on ofdm benchmark. However, when I > use the high modulation rate like qam16 and qam64, the packet error rate > increase significantly. I guess the reason is that the preamble in gunradio is > too weak to do channel estimation, thereby raising the packet error rate. > > Furthermore, even though I test the example offline without going through the > channel, the packet error rate still very high, which make me feel confused. > It is supposed to perform normally offline, without any decoding error right?
In order to do QAM over OFDM, you will need a good equalizer; we currently don't have good ones implemented. 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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