Author: trondeau
Date: 2008-01-01 18:03:51 -0700 (Tue, 01 Jan 2008)
New Revision: 7321
Modified:
gnuradio/branches/developers/trondeau/ofdm2/gnuradio-core/src/lib/general/gr_ofdm_frame_acquisition.cc
Log:
Tightening up loop in correlation to find frequency offset. There should be no
need to look over the entire range. We could probably do even better by
remembering the last frequency offset and start there.
Modified:
gnuradio/branches/developers/trondeau/ofdm2/gnuradio-core/src/lib/general/gr_ofdm_frame_acquisition.cc
===================================================================
---
gnuradio/branches/developers/trondeau/ofdm2/gnuradio-core/src/lib/general/gr_ofdm_frame_acquisition.cc
2008-01-01 23:33:40 UTC (rev 7320)
+++
gnuradio/branches/developers/trondeau/ofdm2/gnuradio-core/src/lib/general/gr_ofdm_frame_acquisition.cc
2008-01-02 01:03:51 UTC (rev 7321)
@@ -115,7 +115,7 @@
int index = 0;
float max = 0, sum=0;
- for(i = 0; i < d_fft_length - d_occupied_carriers; i++) {
+ for(i = zeros_on_left - d_freq_shift_len; i < zeros_on_left +
d_freq_shift_len; i+=2) {
sum = 0;
for(j = 0; j < d_occupied_carriers; j++) {
sum += (d_known_phase_diff[j] * d_symbol_phase_diff[i+j]);
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