Thanks for the comments, Alan and Thomas. Wiring or powerful amplifier would be a good solution. However, in my scenario, distance between two nodes sometimes reaches several tens of miles, which makes it difficult to use such an approach.
So I am wondering if there is any equipment that can measure the time of event in micro-second order precision, and can be synchronized with some standard clock. For example, I imagines a device made by mixing an oscilloscope and GPS-receiver :) If I can secure two such devices, I will be free from physical distance. Thanks, Jinkyu Alan Marchiori wrote: > On Fri, Aug 14, 2009 at 11:19 AM, Thomas Schmid<[email protected]> > wrote: > >> No, what Jinkyu tires to do is to evaluate the precision of FTSP over >> a whole network. One possibility would be to have your beacon node use >> a power amplifier like this one: >> >> http://focus.ti.com/docs/prod/folders/print/cc2591.html >> >> This would extend the range of your beacon compared to other nodes, >> increasing the probability that more nodes will hear it. However, >> depending on your distances and the accuracies that you look at, you >> might want to incorporate time of flight into your precision >> measurements. >> >> Cheers, >> >> Thomas >> > > I see; you could also use some form of backchannel communication for > syncornization. Possibly even just a wire supplying a 1 pulse per > second tied to an interrupt input. > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- Ph.D. Student School of Electrical and Computer Engineering Purdue University, West Lafayette Office: EE338 & MSEE280 Cell: 1-765-337-1704 E-mail: [email protected] _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
