# Re: use of gr-specest for direction finding of a 1X2 MIMO system **URL:** \ **Category:** GNU Radio\ **Created:** [March 9, 2014, 12:13pm UTC](https://www.ruby-forum.com/t/re-use-of-gr-specest-for-direction-finding-of-a-1x2-mimo-system/239661 "2014-03-09T12:13:19Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Post date:** [March 9, 2014, 12:13pm UTC](https://www.ruby-forum.com/t/re-use-of-gr-specest-for-direction-finding-of-a-1x2-mimo-system/239661/1 "2014-03-09T12:13:19Z")
hello, I downloaded and build gr-specest block from github site " [GitHub - kit-cel/gr-specest: A module adding spectral estimation routines to GNU Radio.](https://github.com/kit-cel/gr-specest)" into gnu radio 3.6.5.1, But while make test i got the following result: Test project /home/testbed/Downloads/gr-specest-master/build Start 1: qa\_specest\_arburg\_impl 1/15 Test #1: qa\_specest\_arburg\_impl … Passed 0.54 sec Start 2: qa\_specest\_cyclo\_fam\_calcspectrum\_impl 2/15 Test #2: qa\_specest\_cyclo\_fam\_calcspectrum\_impl … Passed 0.07 sec Start 3: qa\_specest\_esprit\_fortran\_impl 3/15 Test #3: qa\_specest\_esprit\_fortran\_impl … Passed 0.24 sec Start 4: qa\_specest\_burg 4/15 Test #4: qa\_specest\_burg … Passed 1.95 sec Start 5: qa\_specest\_cyclo\_fam 5/15 Test #5: qa\_specest\_cyclo\_fam …\*\*\*Failed 0.55 sec Start 6: qa\_specest\_esprit 6/15 Test #6: qa\_specest\_esprit … Passed 0.31 sec Start 7: qa\_specest\_esprit\_spectrum\_vcf 7/15 Test #7: qa\_specest\_esprit\_spectrum\_vcf …\*\*\*Failed 0.30 sec Start 8: qa\_specest\_esprit\_vcf 8/15 Test #8: qa\_specest\_esprit\_vcf … Passed 2.44 sec Start 9: qa\_specest\_fcov 9/15 Test #9: qa\_specest\_fcov … Passed 0.29 sec Start 10: qa\_specest\_fmcov 10/15 Test #10: qa\_specest\_fmcov … Passed 0.29 sec Start 11: qa\_specest\_gendpss 11/15 Test #11: qa\_specest\_gendpss … Passed 0.27 sec Start 12: qa\_specest\_mtm 12/15 Test #12: qa\_specest\_mtm … Passed 0.82 sec Start 13: qa\_specest\_vectormanip 13/15 Test #13: qa\_specest\_vectormanip … Passed 0.29 sec Start 14: qa\_specest\_welch 14/15 Test #14: qa\_specest\_welch …\*\*\*Failed 0.29 sec Start 15: qa\_specest\_welchsp 15/15 Test #15: qa\_specest\_welchsp …\*\*\*Failed 0.33 sec 73% tests passed, 4 tests failed out of 15 Total Test time (real) = 8.98 sec The following tests FAILED: 5 - qa\_specest\_cyclo\_fam (Failed) 7 - qa\_specest\_esprit\_spectrum\_vcf (Failed) 14 - qa\_specest\_welch (Failed) 15 - qa\_specest\_welchsp (Failed) Errors while running CTest make: \*\*\* [test] Error 8 futhur could i get any documentation which could teel me how to use root music avaliable gr-spect for the purpose of direction finding. currently i have one transmitter and two synchronized receives and i intend to find DOA of my transmitter. ---
**Author:** ![Chandan\_Pradhan](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/c57346/32.png) [@Chandan\_Pradhan](https://www.ruby-forum.com/u/Chandan_Pradhan)\ **Post date:** [March 9, 2014, 12:50pm UTC](https://www.ruby-forum.com/t/re-use-of-gr-specest-for-direction-finding-of-a-1x2-mimo-system/239661/2 "2014-03-09T12:50:28Z")
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Chandan, the specest (spectral estimation toolbox) uses MUSIC to estimate the spectrum; it does that by using the MUSIC algorithm on an unmodified autocorrelation matrix estimate of _one_ input sample stream; if you supply different data, MUSIC will estimate different things. You’ll find the algorithm in specest\_music\_armadillo\_impl.cc; I believe it’s easy to understand if you’ve done MUSIC before. As a side note: Benchmarks have shown that for small signal spaces (in your case: few incident waves from different directions at once), the ESPRIT algorithm (also in gr\_specest!) performs slightly better, and you get the “strongest” frequencies/directions in a vector, and don’t have to search the MUSIC pseudospectrum for local maxima. Greetings, Marcus On 09.03.2014 12:12, Chandan Pradhan wrote: > qa\_specest\_esprit\_fortran\_impl … Passed 0.24 sec > Start 9: qa\_specest\_fcov 9/15 Test #9: qa\_specest\_fcov > …\*\*\*Failed 0.29 sec Start 15: > CTest make: \*\*\* [test] Error 8 > [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)wrote: > > > > > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Discuss-gnuradio > mailing list [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - [http://www.enigmail.net/](http://www.enigmail.net/) iQEcBAEBAgAGBQJTHFUJAAoJEBQ6EdjyzlHtViwH/jwAb8+/4hh7bKfhy/jkKBJk MGM2udvngvNNTaB/iaq3G4f1hPMe45x33W7NFW6vpXckb/R1+hRW+UcDjW4pBKzZ VgVLoy7k1At2E63at+gWBz6e6dWmGWkfB5TXaqrOfWs7nU8S7RTchmMtxc5zfCQ6 VI13WUtmHgwyxdzfptOEoiqSUrP47D9u2be45pC+PWiv7cWGqTLip8Th6kS6eNdw Wznz6Cm5kvSNkOl/qRRRouZ7OkAXZKeLLRg2spKKiKuyjkhLqKhz8Ix9XObHsSu4 ZjdqkuOPagD9Por9KjjPL+d208hxLbRkA7IczEiz8hOIwLiHGgVaAlwQ1qahFUs= =1806 -----END PGP SIGNATURE-----