On Sun, Nov 3, 2013 at 5:09 AM, Martin Braun (CEL) <martin.br...@kit.edu>wrote:
> 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 > Thanks for the clarification. I've been grappling with the high packet error rates for a while now. :) Aditya
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