tag:blogger.com,1999:blog-13490395.post9124527554137244883..comments2017-05-30T09:42:16.183-05:00Comments on The Appian Way: Rain fade updateChuck Russellhttp://www.blogger.com/profile/15429587155202866452noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-13490395.post-54416360148941859352007-12-10T21:43:00.000-06:002007-12-10T21:43:00.000-06:00It increased the signal strength by about 3 dB. U...It increased the signal strength by about 3 dB. Unfortunately, we get intense rain events here that can attenuate the signal over the 1.7 mile length of the beam by 30 dB or more, so we still have some drop outs. We recently installed a high gain antenna on one end to increase the signal by another 6 dB. We'll have to wait for spring rains to know whether that's enough to make it stable.Clif Guyhttps://www.blogger.com/profile/03546100664377891125noreply@blogger.comtag:blogger.com,1999:blog-13490395.post-46023169432687244962007-12-10T21:38:00.000-06:002007-12-10T21:38:00.000-06:00What was the outcome of installing the replacement...What was the outcome of installing the replacement radios?<BR/>-EdgarAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-13490395.post-1611380664513268932007-04-24T09:07:00.000-05:002007-04-24T09:07:00.000-05:00Rain attenuation is a very interesting thing. In I...Rain attenuation is a very interesting thing. In IEEE Transactions on Antennas and Propagation there is an article called <A HREF="http://www.port.ac.uk/research/mde/RAEPublicationsHide/filetodownload,61596,en.pdf" REL="nofollow">"Spatio–Temporal Rain Attenuation Model for<BR/>Application to Fade Mitigation Techniques"</A> that discusses the topic and builds plots of PSD distribution of rain attenuation against the signal frequency. They also prepared a small MATLAB script of the function that builds the model.<BR/><A HREF="http://www.port.ac.uk/research/mde/RAEPublicationsHide/filetodownload,62012,en.pdf" REL="nofollow">Additional article</A> can be interesting as well.<BR/>With that your radio link, which BER it shows?<BR/>I also found an additional <A HREF="http://www.spsc.tugraz.at/courses/mobRadioSystems/diversity.m/file_view" REL="nofollow">diversity simulations MATLAB script</A>.Ralf Baumhttps://www.blogger.com/profile/06049076307600169314noreply@blogger.comtag:blogger.com,1999:blog-13490395.post-7128745347200391762007-04-15T17:22:00.000-05:002007-04-15T17:22:00.000-05:00Rain intensity varied over the 24 hours changing o...Rain intensity varied over the 24 hours changing over to a rain/snow mix for the second 12 hours. It didn't have any thunderstorm cells or periods of especially heavy rain. Total accumulation for the storm was 1.65 inches.<BR/><BR/>We can't be 100% certain if we have a bad radio, but the link does seem to be dropping at least 3 dBm higher than it should. I think we'll know for sure after we install the new ones and have our next storm. Right now the forecast is for three chances of showers over the next 10 days.Clif Guyhttps://www.blogger.com/profile/03546100664377891125noreply@blogger.comtag:blogger.com,1999:blog-13490395.post-11410123243510837342007-04-15T16:28:00.000-05:002007-04-15T16:28:00.000-05:00so do you think you still have a bad radio? Was ye...so do you think you still have a bad radio? Was yesterdays ran very heavy? I'm asking all these questions because I am istalling 2 Bridgewave links this week- 1 and 3 miles...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-13490395.post-68124139979742720762007-04-14T20:04:00.000-05:002007-04-14T20:04:00.000-05:00It stayed up with the rain we had yesterday. The ...It stayed up with the rain we had yesterday. The signal never dropped below -62.<BR/><BR/>Bridgewave sent out new radios that arrived yesterday morning, but the weather didn't allow us to install them. So we're hoping for an opportunity early next week.Clif Guyhttps://www.blogger.com/profile/03546100664377891125noreply@blogger.comtag:blogger.com,1999:blog-13490395.post-56894578421623099792007-04-14T19:12:00.000-05:002007-04-14T19:12:00.000-05:00what happened to the link?what happened to the link?Anonymousnoreply@blogger.com