Search found 186 matches

by justinleeyang
Tue May 17, 2016 8:59 am
Forum: Developer Discussions
Topic: dwm1000 range distance only 70 meter?
Replies: 3
Views: 3720

Re: dwm1000 range distance only 70 meter?

Hi,arnaud:

(1) Channel 2 and 5 can reach about 70m, why the Decawave porvide the range about 290m?
(2) yes, I also don't find the UWB PA, so we will add more anchors to cover whloe area.
by justinleeyang
Mon May 16, 2016 10:08 am
Forum: Developer Discussions
Topic: dwm1000 add more tag?
Replies: 14
Views: 6268

Re: dwm1000 add more tag?

hi, arnaud: I have understanded their method, so cool. I think the key point is the piture: 1.png About clock skew: so the anchor 0 transmit timespan, we can set as constant 1ms, so 2.png =1ms; then other anchors or robot record the received time, so we calculate the clock relative skew to anchor 0,...
by justinleeyang
Mon May 16, 2016 8:40 am
Forum: Developer Discussions
Topic: dwm1000 range distance only 70 meter?
Replies: 3
Views: 3720

dwm1000 range distance only 70 meter?

Hi, all:

I have tested the dwm1000 range distance, only about 70 meter? the office display about 290 meter, I need add some PA?
or how to do we can add the range?
by justinleeyang
Thu May 12, 2016 3:47 pm
Forum: Developer Discussions
Topic: dwm1000 add more tag?
Replies: 14
Views: 6268

Re: dwm1000 add more tag?

hi,

Thank you very much!
I will research and try it.
by justinleeyang
Wed May 11, 2016 12:24 am
Forum: Developer Discussions
Topic: dwm1000 add more tag?
Replies: 14
Views: 6268

Re: dwm1000 add more tag?

hi,
the anchor would send data and the tag would only receive? the way have related paper ?
by justinleeyang
Mon May 09, 2016 2:31 am
Forum: Developer Discussions
Topic: dwm1000 add more tag?
Replies: 14
Views: 6268

dwm1000 add more tag?

Hi,everyone:

Now a tag with muti-anchor, but I want to add more tag mount on aircraft with multi-anchors, what method to achieve it?
Thanks!
by justinleeyang
Sat Apr 09, 2016 2:55 pm
Forum: Developer Discussions
Topic: anchor calculate the distance with TWR
Replies: 0
Views: 1751

anchor calculate the distance with TWR

Hi, see the lps-code-firmware, find that calculate the distacne node is tag, we want anchor to do the thing. so we change code, when tag receive answer, packet the poll_tx, answer_rx and the final_tx to send to anchor, but the issue is final_tx wiht tag, I must get timestamp before transmit final, h...
by justinleeyang
Sat Apr 02, 2016 7:22 am
Forum: Developer Discussions
Topic: crazy-client-python plotter display dwm1000 airtime?
Replies: 0
Views: 1424

crazy-client-python plotter display dwm1000 airtime?

Hi,everyone:

I try the dwm1000 mount at crazyflie2.0, test the airtime? the picture as follow:
dwm1000test.png
the y axis mean? the unit is ms? so the airtime is about 2~4ms?
by justinleeyang
Tue Mar 22, 2016 10:36 am
Forum: Developer Discussions
Topic: DWM1000 DS-TWR method calculate distance method?
Replies: 5
Views: 5763

Re: DWM1000 DS-TWR method calculate distance method?

Hi,

Wow, Thanks! I appreciate it!
But why Alpha plus Beta = 2 ?
by justinleeyang
Tue Mar 22, 2016 5:08 am
Forum: Developer Discussions
Topic: DWM1000 DS-TWR method calculate distance method?
Replies: 5
Views: 5763

Re: DWM1000 DS-TWR method calculate distance method?

Hi,arnaud:

Thank you for your reply!

another question, I find every dwm1000 module maybe the antenna delay is different. if we set the same delay, the measure error will more high.
can we dynamicly correct the every module?