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[Commit-gnuradio] r5750 - gnuradio/branches/features/ofdm/sync/gnuradio-
From: |
trondeau |
Subject: |
[Commit-gnuradio] r5750 - gnuradio/branches/features/ofdm/sync/gnuradio-core/src/python/gnuradio/blksimpl |
Date: |
Fri, 8 Jun 2007 14:18:31 -0600 (MDT) |
Author: trondeau
Date: 2007-06-08 14:18:31 -0600 (Fri, 08 Jun 2007)
New Revision: 5750
Modified:
gnuradio/branches/features/ofdm/sync/gnuradio-core/src/python/gnuradio/blksimpl/ofdm_sync_ml.py
gnuradio/branches/features/ofdm/sync/gnuradio-core/src/python/gnuradio/blksimpl/ofdm_sync_pn.py
Log:
adding references for ML and PN OFDM synchonization algorithms.
Modified:
gnuradio/branches/features/ofdm/sync/gnuradio-core/src/python/gnuradio/blksimpl/ofdm_sync_ml.py
===================================================================
---
gnuradio/branches/features/ofdm/sync/gnuradio-core/src/python/gnuradio/blksimpl/ofdm_sync_ml.py
2007-06-08 20:10:37 UTC (rev 5749)
+++
gnuradio/branches/features/ofdm/sync/gnuradio-core/src/python/gnuradio/blksimpl/ofdm_sync_ml.py
2007-06-08 20:18:31 UTC (rev 5750)
@@ -25,6 +25,12 @@
class ofdm_sync_ml(gr.hier_block):
def __init__(self, fg, fft_length, cp_length, snr, logging):
+ ''' Maximum Likelihood OFDM synchronizer:
+ J. van de Beek, M. Sandell, and P. O. Borjesson, "ML Estimation
+ of Time and Frequency Offset in OFDM Systems," IEEE Trans.
+ Signal Processing, vol. 45, no. 7, pp. 1800-1805, 1997.
+ '''
+
self.fg = fg
# FIXME: when converting to hier_block2's, the output signature
Modified:
gnuradio/branches/features/ofdm/sync/gnuradio-core/src/python/gnuradio/blksimpl/ofdm_sync_pn.py
===================================================================
---
gnuradio/branches/features/ofdm/sync/gnuradio-core/src/python/gnuradio/blksimpl/ofdm_sync_pn.py
2007-06-08 20:10:37 UTC (rev 5749)
+++
gnuradio/branches/features/ofdm/sync/gnuradio-core/src/python/gnuradio/blksimpl/ofdm_sync_pn.py
2007-06-08 20:18:31 UTC (rev 5750)
@@ -26,6 +26,12 @@
class ofdm_sync_pn(gr.hier_block):
def __init__(self, fg, fft_length, cp_length, logging=False):
+ ''' OFDM synchronization using PN Correlation:
+ T. M. Schmidl and D. C. Cox, "Robust Frequency and Timing
+ Synchonization for OFDM," IEEE Trans. Communications, vol. 45,
+ no. 12, 1997.
+ '''
+
self.fg = fg
# FIXME: when converting to hier_block2's, the output signature
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