Is there a DSP library function available for complex matrix inverse?

Ashley

Hi,

I implemented LU decomposition algorithm to find the inverse of a 36 x 36 complex matrix (In turn I had to convert this in to a 72 x 72 matrix before I could pass it to the matrix inverse algorithm). This is increasing the CPU cycles required for the computation and hence my C - code is not meeting the time requirement.

I was wondering if there is any DSP library function available to find the inverse of a complex matrix? I checked the forum but couldn't get much help.

If there is no such library function available for CCS, I would appreciate if somebody can guide me towards better complex matrix inverse algorithms or ideas.

Thank you.

over 9 years ago

0 Asheesh Bhardwaj over 9 years ago

TI__Expert 4680 points

Refer to Single precision DSPF_sp_lud_inv_cmplx and Double precision DSPF_dp_lud_inv_cmplx functions in the DSP library version 3.4.0.0.

Regards,
Asheesh

0 Ashley over 9 years ago in reply to Asheesh Bhardwaj

Intellectual 340 points

Hi Asheesh,

Thanks for your help. Is there a DSP Library programmer's reference guide document available for this 3.4.0.0 version?

0 Asheesh Bhardwaj over 9 years ago in reply to Ashley

TI__Expert 4680 points

The documents included in the DSP library installer with user manual in doxygen form.

Regards

Asheesh

0 Ashley over 9 years ago in reply to Asheesh Bhardwaj

Intellectual 340 points

Hello Asheesh,

Thanks for the info. I have a couple of questions regarding linking my project to the new library:

1. I am working on CCS v5.5. and I installed the new DSP library version (3.4.0.0) to use the available DSPF_sp_lud_inv_cmplx function. Will this create any linking issues between my project and the available library functions? I added the correct file search path, included the header file in my main program and I am still getting the "Symbol cannot be resolved" error.

2. Is there some kind of documentation available that can help me to use the new DSP library functions? (I still have the old version - 3.1.0.0 in my "ti" folder. Do I need to delete the old library?).

Thanks for your help.

0 Asheesh Bhardwaj over 9 years ago in reply to Ashley

TI__Expert 4680 points

You can refer to the mcsdk examples for integrating the libraries into the project.

Regards

Asheesh

0 Ashley over 9 years ago

Intellectual 340 points

Hi,

Thank you very much. I am able to use the LU decomposition library function now.

However, I did not see much performance improvement after profiling ( the time taken has reduced from 1.69 msec to 1.36 msec). I need to run my whole project in one millisecond, but this function (includes two 36x36 and 36x36 complex matrix multiplications, one 84x36 and 36x36 complex matrix multiplication and one 36x36 complex matrix inverse) alone is taking up huge time now.

Would appreciate any programming tips/tricks that can help me reduce the time taken.

Thanks!

0 Asheesh Bhardwaj over 9 years ago in reply to Ashley

TI__Expert 4680 points

Refer the below documents for the optimization guide of DSP.

www.ti.com/.../spru187v.pdf
www.ti.com/.../sprabf2.pdf

Regards,
Asheesh

0 Ashley over 9 years ago in reply to Asheesh Bhardwaj

Intellectual 340 points

Thank you!

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Is there a DSP library function available for complex matrix inverse?