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[Commit-gnuradio] r4103 - gnuradio/branches/developers/n4hy/ofdm/gnuradi
From: |
n4hy |
Subject: |
[Commit-gnuradio] r4103 - gnuradio/branches/developers/n4hy/ofdm/gnuradio-examples/python |
Date: |
Sat, 16 Dec 2006 12:17:07 -0700 (MST) |
Author: n4hy
Date: 2006-12-16 12:17:07 -0700 (Sat, 16 Dec 2006)
New Revision: 4103
Modified:
gnuradio/branches/developers/n4hy/ofdm/gnuradio-examples/python/ofdm_test.py
Log:
Bug fix in SNR calculation
Modified:
gnuradio/branches/developers/n4hy/ofdm/gnuradio-examples/python/ofdm_test.py
===================================================================
---
gnuradio/branches/developers/n4hy/ofdm/gnuradio-examples/python/ofdm_test.py
2006-12-16 19:08:27 UTC (rev 4102)
+++
gnuradio/branches/developers/n4hy/ofdm/gnuradio-examples/python/ofdm_test.py
2006-12-16 19:17:07 UTC (rev 4103)
@@ -56,13 +56,13 @@
self.show_debug_info = True
# parameters
- fftsize = 128
- occupied_tones = 60
- symbol_length = 160
+ fftsize = 512
+ occupied_tones = 384
+ symbol_length = 512+64
cpsize = symbol_length - fftsize
- SNR_db = 20
+ SNR_db = 10
SNR = 10.0**(SNR_db/10.0)
power_in_signal = occupied_tones
@@ -82,7 +82,6 @@
self.ifft = gr.fft_vcc(fftsize, False, win)
self.cp_adder = gr.ofdm_cyclic_prefixer(fftsize,symbol_length)
self.noise_adder = gr.add_cc()
- SNR = math.sqrt(10.0/occupied_tones)
self.noise = gr.noise_source_c(gr.GR_GAUSSIAN,noise_voltage,1)
#self.debugfile = gr.file_sink(gr.sizeof_gr_complex,"debug_out")
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