Differences

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--- exploring_lora [2018/10/13 09:40] – [4.1. Time on Air] samer
+++ exploring_lora [2019/02/02 20:38] – [5. Coverage Challenge] samer
@@ Line 137: / Line 137: @@
   * An explanatory video: https://www.youtube.com/watch?v=C_Rh5GSENA4
   * Various calculation tools available online: https://www.loratools.nl/#/airtime, [[https://docs.google.com/spreadsheets/d/1voGAtQAjC1qBmaVuP1ApNKs1ekgUjavHuVQIXyYSvNc/edit?usp=sharing |Spreadsheet]]
+Note that all messages sent and received by the [[https://www.airspayce.com/mikem/arduino/RadioHead/classRH__RF95.html| RH_RF95 RadioHead]] driver we are using conform to this packet format:
+  * 8 symbol PREAMBLE
+  * Explicit header with header CRC (handled internally by the radio)
+  * 4 octets HEADER: (TO, FROM, ID, FLAGS)
+  * 0 to 251 octets DATA
+  * CRC (handled internally by the radio)
 <WRAP center round help 100%>
@@ Line 174: / Line 182: @@
   * Direct transmission between the two devices is only considered.
-  * 3D distance is computed between devices.
+  * 3D distance is computed between devices. You can get the elevation from this [[ http://www.geocontext.org/publ/2010/04/profiler/en/ | site]].
   * PDR must be higher than 10% as computed for 100 packets.
+  * Supporting live video and screen capture should be used to authenticate the record.
+You can use the [[https://cloudrf.com/ | Cloud RF]] online service to obtain information on the elevation, Fresnel zone, and estimated path loss.
+<WRAP center round todo 60%>
+Take a look at this tool [[http://radiomobile.pe1mew.nl/index.php?Welcome...]].
+</WRAP>
 <WRAP center round help 100%>
-  * Compute the Fresnel zone for your transmission.
+  * Compute the Fresnel zone for your transmission using [[https://cloudrf.com/ | Cloud RF]]. Comment the result.
-  * Provide the expression of the link budget and compute the received power using two different pathloss models.
+  * Provide the expression of the link budget and compute the received power using two different path loss models (ITM, Line of sight) with Cloud RF.
-  * Compare the received power obtained experimentally with the theoretical results.
+  * Compare the received power obtained experimentally with the results of Cloud RF.
-  * Prepare a short presentation to describe your experiment.
+  * Prepare a short presentation (5 minutes pitch) to describe your experiment.
 </WRAP>