Changes between Version 8 and Version 9 of Architecture/Deployment/Measurements

Timestamp:

May 30, 2021, 4:02:53 AM (3 years ago)

Author:

mpk2138

Comment:

—

Architecture/Deployment/Measurements

@@ -13 +13 @@
 
 ==== Measurement Overview
-A uniform procedure is used to measure each node. The procedure utilizes the [https://wiki.cosmos-lab.org/wiki/Hardware/sdr/usrp2974#USRP2974 USRP 2974] in each node to transmit real 802.11g data packets at regular 100ms intervals with fixed +27 dBm power on channel 1 (2412 MHz). The 802.11g packets are generated in GNU Radio, using an 802.11 out-of-tree (OOT) framework [ 1 ], and transmitted through the node's [https://wiki.cosmos-lab.org/wiki/Hardware/rf-front-end#RFFrontEnd RF Front End], as shown in Figure 1. A Dell XPS 13 laptop computer with an Intel 8265 !WiFi card [ 2 ] is then used to receive and decode these packets in different locations, with the output provided by the {{{tcpdump}}} command. Each decoded packet reports its received power from the perspective of the Laptop !WiFi card. 
+A uniform procedure is used to measure each node. The procedure utilizes the [https://wiki.cosmos-lab.org/wiki/Hardware/sdr/usrp2974#USRP2974 USRP 2974] in each node to transmit real 802.11g data packets at regular 100ms intervals with fixed +27 dBm power on channel 1 (2412 MHz). The modulation and coding scheme used for these packets is QPSK !3/4. The 802.11g packets are generated in GNU Radio, using an 802.11 out-of-tree (OOT) framework [ 1 ], and transmitted through the node's [https://wiki.cosmos-lab.org/wiki/Hardware/rf-front-end#RFFrontEnd RF Front End], as shown in Figure 1. A Dell XPS 13 laptop computer with an Intel 8265 !WiFi card [ 2 ] is then used to receive and decode these packets in different locations, with the output provided by the {{{tcpdump}}} command. Each decoded packet reports its received power from the perspective of the Laptop !WiFi card. 
 
  || [[Image(COSMOS Node Measurements Overview.png, 600px)]]