Changes between Version 4 and Version 5 of WARPLab/Examples/OFDM

Timestamp:

Feb 21, 2014, 11:28:19 AM (10 years ago)

Author:

murphpo

Comment:

--

WARPLab/Examples/OFDM

@@ -3 +3 @@
 File: [source:/ResearchApps/PHY/WARPLAB/WARPLab7/M_Code_Examples/wl_example_siso_ofdm_txrx.m wl_example_siso_ofdm_txrx.m] 
 
-This WARPLab example implements a SISO OFDM transmitter and receiver. 
+This WARPLab example implements a SISO OFDM transmitter and receiver.
+
+'''Important:''' this script is not intended as a tutorial of OFDM. If you're not already familiar with the basics of OFDM please start with one of the many good [https://www.google.com/search?q=ofdm+tutorial OFDM tutorials] available online. You will need to know the basics of OFDM before understanding the Tx and Rx processing in this example.
 
 == Transmitter ==
@@ -38 +40 @@
 To use the example in simulation mode set the top-level param {{{USE_WARPLAB_TXRX = 0;}}}, then run the m-script. When the script finishes 6 plots will show:
 
-||  [[Image(wl_ofdm_plots_sim_txIQ.png,nolink)]][[BR]]Transmitted waveform  ||  [[Image(wl_ofdm_plots_sim_rxIQ.png,nolink)]] [[BR]]Received waveform  ||  [[Image(wl_ofdm_plots_sim_ltsCorr.png,nolink)]] [[BR]]Preamble correlation results (peaks indicate locations of preamble LTS)  ||
-||  [[Image(wl_ofdm_plots_sim_chanEst.png,nolink)]] [[BR]]Channel estimate per subcarrier (I/Q components and complex magnitude)  ||  [[Image(wl_ofdm_plots_sim_phaseError.png,nolink)]] [[BR]]Phase error per OFDM symbol based on pilot tones  ||  [[Image(wl_ofdm_plots_sim_constellations.png,nolink)]] [[BR]]Tx and Rx constellations  ||
+||  [[Image(wl_ofdm_plots_sim_txIQ.png,nolink)]][[BR]]Transmitted waveform  ||  [[Image(wl_ofdm_plots_sim_rxIQ.png,nolink)]] [[BR]]Received waveform  ||  [[Image(wl_ofdm_plots_sim_ltsCorr.png,nolink)]] [[BR]]Preamble correlation results[[BR]](peaks indicate locations of preamble LTS)  ||
+||  [[Image(wl_ofdm_plots_sim_chanEst.png,nolink)]] [[BR]]Channel estimate per subcarrier[[BR]](I/Q components and complex magnitude)  ||  [[Image(wl_ofdm_plots_sim_phaseError.png,nolink)]] [[BR]]Phase error per OFDM symbol based on pilot tones  ||  [[Image(wl_ofdm_plots_sim_constellations.png,nolink)]] [[BR]]Tx and Rx constellations  ||
 
 By default the simulation script applies AWGN with an arbitrary fixed SNR. You can change the simulated propagation characteristics in the m-code. Search for {{{AWGN}}} and apply whatever Tx->Rx degradations you like.
 
-For example to simulate a perfect (noiseless) link, set the noise power to zero: {{{rx_vec_air = tx_vec_air + 0*complex(randn(1,length(tx_vec_air)), randn(1,length(tx_vec_air))); }}}.
+For example to simulate a perfect (noiseless) link, set the noise power to zero:
+{{{
+rx_vec_air = tx_vec_air + 0*complex(randn(1,length(tx_vec_air)), randn(1,length(tx_vec_air)));
+}}}
 
 The script also prints statistics about the experiment to the MATLAB command prompt:
@@ -57 +62 @@
 
 === Hardware in the Loop ===
-To use the example with WARP hardware you will need two WARP nodes each running WARPLab 7.3 (or later) and a WARPLab environment setup on your PC. Refer to the [wiki:../QuickStart WARPLab Quick Start] if you have not yet setup WARPLab.
+To use the example with WARP hardware you will need two WARP nodes each running WARPLab 7.3 (or later) and a WARPLab environment setup on your PC. Refer to the [wiki:../../QuickStart WARPLab Quick Start] if you have not yet setup WARPLab.
 
 To target WARP hardware set the top-level param {{{USE_WARPLAB_TXRX = 1;}}}, then run the m-script. When the script finishes 6 plots will show: