Changes between Version 2 and Version 3 of Tutorials/Wireless/Channel SoundingMIMO

Timestamp:

Sep 21, 2020, 6:51:17 PM (5 years ago)

Author:

tingjunchen

Comment:

—

Tutorials/Wireless/Channel SoundingMIMO

@@ -51 +51 @@
 
 === Experiment Execution ===
-==== Find and prepare USRPs ====
+==== Find and prepare USRPs and the Sounder software ====
+
 * The IP addresses for Ethernet Port 1(10G) on {{{sdr2-s1-lg1}}} and {{{sdr2-md1}}} were hard-coded to {{{10.118.2.2}}} and {{{10.118.3.2}}} respectively. To access them from {{{srv2-lg1}}}, configure the network interface {{{eno2}}} as follows:
 {{{#!shell
@@ -101 +102 @@
 
 * Download and build the RENEW Sounder software **on the {{{develop}}} branch** at [https://github.com/renew-wireless/RENEWLab/ here] and follow the [https://docs.renew-wireless.org/dev-suite/design-flows/cpp/sounder/ instructions] to build it. Note that the {{{master}}} branch does not have UHD support.
+
+* Include in {{{files/usrp-bs-serials.txt}}} the IP address {{{10.118.2.2}}}, i.e., use {{{sdr2-s1-lg1}}} as the base station (BS). In {{{files/usrp-bs-only.json}}}, set {{{"channel" : "AB",}}} to enable dual-channel on {{{sdr2-s1-lg1}}}.
+
+* Similarly, in {{{files/usrp-client-only.json}}}, set {{{"sdr_id" : [ "10.118.3.2" ]}}} (i.e., use {{{sdr2-md1}}} as the user) and {{{"channel" : "AB",}}} to enable dual-channel on {{{sdr2-md1}}}.
+
+
+=== Execution ===
+==== Run the experiment ====
+* In the first terminal [Terminal 1], start the client:
+{{{#!shell
+root@srv2-lg1:~/git/renew-software/CC/Sounder# ./sounder files/usrp-client-only.json
+...
+...
+pinning client thread 0 to core 1
+scheduling TX 13 Frames (41.08 ms) in the future!
+1 uplink symbols will be sent per frame...
+Beacon detected at Time 32476200, sync_index: 13100
+Start main client txrx loop...
+}}}
+
+* In the second terminal [Terminal 2], start the BS:
+{{{#!shell
+root@srv2-lg1:~/git/renew-software/CC/Sounder# ./sounder files/usrp-bs-only.json 
+...
+...
+Set HDF5 File to logs/trace-2020-9-21-18-46-29_1x2x2.hdf5 and group to /
+task thread 0 starts
+pinning thread 0 to core 1
+Recv Thread 0: waiting for release
+receiver thread 0 has 1 radios
+Sync BS host and FPGA timestamp...
+Start BS main recv loop... 
+Saving HDF5, 2000 frames saved.
+...
+...
+}}}
+
+==== Analyze the results ====
+* Once the hdf5 file is recorded (in this case, {{{logs/trace-2020-9-21-18-46-29_1x2x2.hdf5}}}), follow the **Analyze the HDF5 dataset** step [https://docs.renew-wireless.org/dev-suite/design-flows/cpp/sounder/ here] to analyze the results. For example, we can show the pilot sequence for computing the 2x2 channel matrix H = [h00, h01; h10, h11] as follows:
+{{{#!shell
+root@srv2-lg1:~/git/renew-software/PYTHON/IrisUtils# python3 plot_hdf5.py ../../CC/Sounder/logs/trace-2020-9-21-18-46-29_1x2x2.hdf5 --ref-ant 0 --ref-user 0 --ref-frame 1500
+}}}
+
+|| [[Image(MIMOSounding_tutorial_h00.png, 900px)]] ||
+
+