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176 Commity (7fa0fc4988f88c6f608e86c003e204171d892fa3)

Autor SHA1 Wiadomość Data
proto17 7fa0fc4988
Create est_integer_freq_offset.m 2022-05-18 23:40:07 -04:00
proto17 a170391a9e
Create test_integer_freq_offset.m 2022-05-18 23:30:40 -04:00
proto17 ec1ca41c6b
Create cyclic_prefix_sto_test.m 2022-05-17 22:37:01 -04:00
proto17 95863425aa
Create ifo_test.m 2022-05-16 23:19:27 -04:00
proto17 ca5fada2d0
Update README.md 2022-04-30 12:27:46 -04:00
proto17 f312a1cc14
Update README.md 2022-04-30 12:26:42 -04:00
proto17 b80be8d9b8
Update README.md 2022-04-30 12:25:51 -04:00
David Protzman 9e2aafab50 Moved the offset index back 1 FFT size 
This is because the new xcorr function is forward looking vs reverse looking
 2022-04-30 12:00:04 -04:00
David Protzman 46b2c4dad5 Warning the user if correlation threshold > 1.0 
Now that the xcorr is truly normalized, there's no good reason to go above 1.0
 2022-04-30 11:59:32 -04:00
David Protzman 388d4acd7b Erroring if correlation threshold < 0 2022-04-30 11:59:05 -04:00
David Protzman 4309068874 Added comments 2022-04-30 11:58:21 -04:00
David Protzman 60ea5e6f3f Shrunk the peak search window from 100 to 10 
No reason to look that far around for the peak of a ZC sequence correlation
 2022-04-30 11:58:02 -04:00
David Protzman b442f73baf Now using a truly normalized cross correlation 2022-04-30 11:57:09 -04:00
David Protzman e4a49306b2 Added running sum for abs squared 2022-04-28 23:04:50 -04:00
David Protzman 9daf1ecaab Added missing update to `prev_val` 2022-04-28 22:46:08 -04:00
David Protzman 1d2698c0af Added a new normalized xcorr function that's faster 
Does trade some accuracy in the process
 2022-04-28 22:43:57 -04:00
David Protzman 63e26007f8 Merge branch 'main' of github.com:proto17/dji_droneid into main 2022-04-26 22:25:44 -04:00
David Protzman c173de56b4 Added default sample type 2022-04-26 22:18:38 -04:00
David Protzman 5e800d24d0 Making use of get_bytes_per_sample function in convert file type 2022-04-26 22:17:53 -04:00
David Protzman 38352ec47b Casting bursts to double complex 2022-04-26 22:17:17 -04:00
David Protzman 43a19fe44a Added comments 2022-04-26 22:16:08 -04:00
David Protzman 863bf910be Added varargs for extract bursts and find zc seq funcs 2022-04-26 22:15:47 -04:00
David Protzman 94ee1b3602 Updated get_sample_count_of_file to use new function for num of bytes/sample 2022-04-26 21:28:59 -04:00
David Protzman 3213764d68 Added function to get the number of bytes in a numeric type 2022-04-26 21:23:16 -04:00
David Protzman df18420eaf Fixed bug where floating point samples came back as 'single' 
This would cause lots of functions to fail since a lot of the dsp functions rely on doubles
 2022-04-26 21:12:32 -04:00
proto17 6856680800
Merge pull request #2 from hb9fxq/patch-1 
abandon burst at invalid left_idx (0)
 2022-04-25 06:42:36 -04:00
Frank Werner-Krippendorf 62fd7eda90
abandon burst at invalid left_idx (0) 2022-04-25 08:44:47 +02:00
David Protzman d8f7b73c37 Added function to convert between IQ formats 2022-04-24 16:57:20 -04:00
David Protzman 6c875b5014 Had to change dimensions on freq correction vector 
This happened due to a change in the read_complex_floats function
 2022-04-24 16:45:07 -04:00
David Protzman 8fe194bcd6 Added script to normalize an input vector to -1.0 to 1.0 2022-04-24 16:44:33 -04:00
David Protzman 0544182553 Now normalizing the IFFT outputs 2022-04-24 16:44:07 -04:00
David Protzman 3b1448497b Now just calling write_complex 2022-04-24 16:42:40 -04:00
David Protzman 9d259ca6fc Converted create_burst to a function 2022-04-24 15:02:38 -04:00
David Protzman 30f5ecff6e Added function to get the number of seconds since epoch 2022-04-24 15:01:59 -04:00
David Protzman 5daf3dd4cc Now using the read_complex function 2022-04-24 14:48:40 -04:00
David Protzman d57e1e880f Add function to read arbitrary type complex samples from a file 2022-04-24 14:48:29 -04:00
David Protzman f7bcb5eb55 Created function to write complex samples to disk 2022-04-24 14:29:33 -04:00
David Protzman 60ea2b16bc Converted the create_burst script to a function 2022-04-24 00:52:24 -04:00
David Protzman 40a604dd23 Added more plots 2022-04-24 00:45:05 -04:00
David Protzman df098c3e6c Fixed bug in coarse freq recovery 
The windows were one sample misaligned in time
 2022-04-24 00:42:08 -04:00
David Protzman 7d9f15b28f No longer using `vars{:}` 
Would likely end up confusing users
 2022-04-24 00:40:41 -04:00
David Protzman 9ad6b0976d Now forcing creation of 9 OFDM symbols 2022-04-24 00:40:17 -04:00
David Protzman df94a81670 The create_burst_2.m is now the main create_burst.m 2022-04-24 00:05:52 -04:00
David Protzman 63370cd7a2 Removed the original create_burst.m script 
Will replace with next commit
 2022-04-24 00:04:14 -04:00
David Protzman 1dd71fadab Made plotting optional 2022-04-24 00:03:02 -04:00
David Protzman f074e3f4de Made plotting optional 2022-04-24 00:02:03 -04:00
David Protzman 29e211a49e Removed commented out lines 2022-04-24 00:01:53 -04:00
David Protzman e47277c32a Changed to a more reasonable SNR 
60 is actually about 30 when looking at the 10*log10(abs(samples).^2) plot
 2022-04-24 00:01:11 -04:00
David Protzman 6c45489961 Removed comm.OFDMModulator 2022-04-23 23:59:56 -04:00
David Protzman cbb38ab748 Script is currently working, but not well 
Something is up when using the equalizer in demod
 2022-04-23 23:45:31 -04:00