Hi Doug, Thanks. May I ask what your cpu speed is? And what CPU can match the capacity of USRP2?
BTW, I don't have USRP boards yet. I will try your updated bbn 802.11 code when I get the boards. Yihu On Mon, Dec 8, 2008 at 2:17 PM, Douglas Geiger <[EMAIL PROTECTED] > wrote: > Yihu Li wrote: > > Hi, > > > > I am new to gnuradio and trying to do some work based on 802.11. Through > > my understanding, the current implementations of 802.11-like schemes > > over gnuradio are mostly limitted by the processing delay on and between > > the host computer and USRP boards, eapecially due to the bottleneck of > > the USB connection between the USRP and host computer. Due to such delay > > limitations, in the implementations to 802.11 with USRP, the bandwidth > > has to be scaled down and some tuning to the IFSs has to be done to make > > the implementation work. > > > > Now USRP2 offers Gigaehernet connection and more powerful signal > > processing hardwares. To what extent USRP2 solve the limitations of > > implementing a full-powerful 802.11 over the current gnuradio framework > > (together with the new m-block)? Besides USRP or USRP2 boards, any other > > issues mattered? Do we still need to scale down the bandwidth and tune > > the IFSs? Are there any working implementations or studies which fully > > exploited the newest gnuradio framework? > > > > Thanks a lot. > > > > Yihu > > > > > > I'm working on this right now as well. At the moment I'm working with > the original BBN 802.11b stack, modified to work with the hier_block2 > API. The problem I'm running into now is the amount of CPU required on > the host PC to work with the amount of data the USRP2 can put out. For > the moment I'm trying to get around that by doing the processing > off-line, and plan on investigating a few ways to cut down on the amount > of CPU needed (i.e., besides just buying a faster machine). > Doug > > -- > Doug Geiger > Research Assistant > Communications and Signal Processing Lab > Oklahoma State University > http://cspl.okstate.edu > [EMAIL PROTECTED] > [EMAIL PROTECTED] >
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