[Commit-gnuradio] r4116 - gnuradio/branches/developers/n4hy/ofdm/gnuradio-examples/python

[matt]

Author: matt
Date: 2006-12-17 16:15:18 -0700 (Sun, 17 Dec 2006)
New Revision: 4116

Modified:
   gnuradio/branches/developers/n4hy/ofdm/gnuradio-examples/python/ofdm_test.py
Log:
updates to ofdm testing block

Modified: 
gnuradio/branches/developers/n4hy/ofdm/gnuradio-examples/python/ofdm_test.py
===================================================================
--- 
gnuradio/branches/developers/n4hy/ofdm/gnuradio-examples/python/ofdm_test.py    
    2006-12-17 23:14:35 UTC (rev 4115)
+++ 
gnuradio/branches/developers/n4hy/ofdm/gnuradio-examples/python/ofdm_test.py    
    2006-12-17 23:15:18 UTC (rev 4116)
@@ -64,6 +64,8 @@
 
         SNR_db = 30.0
         SNR = 10.0**(SNR_db/10.0)
+        frequency_offset = -0.110
+        fdiff = frequency_offset * sample_rate / fftsize
 
         power_in_signal = occupied_tones
         noise_power_in_channel = power_in_signal/SNR
@@ -83,7 +85,7 @@
         self.cp_adder = gr.ofdm_cyclic_prefixer(fftsize,symbol_length)
         self.noise_adder = gr.add_cc()
         self.noise = gr.noise_source_c(gr.GR_GAUSSIAN,noise_voltage,1)
-        self.offset = 
gr.sig_source_c((sample_rate*1.0),gr.GR_SIN_WAVE,-0.0*sample_rate/fftsize,1.0,0.0)
+        self.offset = 
gr.sig_source_c((sample_rate*1.0),gr.GR_SIN_WAVE,fdiff,1.0,0.0)
         self.mixer_offset = gr.multiply_cc()
 
         #self.debugfile = gr.file_sink(gr.sizeof_gr_complex,"debug_out")