1 files changed, 50 insertions, 0 deletions
diff --git a/gr-digital/python/ofdm_sync_fixed.py b/gr-digital/python/ofdm_sync_fixed.py
new file mode 100644
index 000000000..9bac789bf
--- /dev/null
+++ b/gr-digital/python/ofdm_sync_fixed.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+#
+# Copyright 2007 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+import math
+from gnuradio import gr
+
+class ofdm_sync_fixed(gr.hier_block2):
+    def __init__(self, fft_length, cp_length, nsymbols, freq_offset, logging=False):
+
+        gr.hier_block2.__init__(self, "ofdm_sync_fixed",
+				gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
+				gr.io_signature2(2, 2, gr.sizeof_float, gr.sizeof_char)) # Output signature
+
+        # Use a fixed trigger point instead of sync block
+        symbol_length = fft_length + cp_length
+        pkt_length = nsymbols*symbol_length
+        data = (pkt_length)*[0,]
+        data[(symbol_length)-1] = 1
+        self.peak_trigger = gr.vector_source_b(data, True)
+
+        # Use a pre-defined frequency offset
+        foffset = (pkt_length)*[math.pi*freq_offset,]
+        self.frequency_offset = gr.vector_source_f(foffset, True)
+
+        self.connect(self, gr.null_sink(gr.sizeof_gr_complex))
+        self.connect(self.frequency_offset, (self,0))
+        self.connect(self.peak_trigger, (self,1))
+
+        if logging:
+            self.connect(self.peak_trigger, gr.file_sink(gr.sizeof_char, "ofdm_sync_fixed-peaks_b.dat"))
+