LMS filter code for FPGA

[rpursley8]

Anyone have any code they are willing to share to put an LMS filter in an FPGA to use with a cRIO system?  I am doing some two channel adaptive noise cancelling at audio rates (16 kHz).

Thanks.

[sshearman]

Randy,

We have some pre-alpha example code that includes a simple example that calls on the adaptive filter to filter two Analog In signals and send the results out of an Analog Out.. It would require LabVIEW 7.1.1 and the FPGA module. Please let me know if you are interested..

--Sam

[rpursley8]

yes, I am interested.  It would give me a place to start from.  Thanks, Sam.




Randy

[Lak]

Hi Sam,

I am looking for a Normilized LMS filter in LabView to perform the echo cancellation. I will appreciate if you can point me to any examples.

Thanks

Lakshmi

[Nann]

Hi Lak,

Some questions for you here:

(1) Do you just want a software demo?
(2) What applications are you working on, line echo cancellation or acoustic echo cancellation? 
(3) What's the largest delay  you want to handle?
(4) What's the bandwidth and sampling rate?

[Lak]

I want to develop it using LabView 7.1 signal processing toolkit. I am working on line echo cancellation for a school project. I am expecting to handle delay in the order of 100ms. Sampling rate is 8kHz and bandwidth is voice band.

[pine]

Lak,

Are you still working on echo/noise cancellation project? I'm very interested in your application. The followings are my questions:
1. Do you want algorithm VI for simulation on LV or using hardware for real application?
2. If you need hardware, then what hardware do you need? PXI? cRIO or the others?

Actually, we already have LMS/NLMS and some other advanced algorithms on LabVIEW, we also have LMS that can run on cRIO FPGA.
Please let me know if you need them.

[valais]

Hi,

I'm working on a project in adaptive sound control in a room and I have now to use the compactrio (crio) 9014 and I'm interested to have some examples of codes. Is it possible?

Thanks

Valais

[Pratima]

hi!

I am also developing the same application (adaptive noise cancellation) using crio with FPGA.

I have simulated the application in RT .my whole adaptive task(LMS algo etc.) was in RT.but now i want to do implement this application using FPGA with the help of LUTs,FXPs,DMA.

anybody can suggest me how can i proceed?

Dear,sam you have developed the LMS fiter in FPGA code,can u share this code....please so that i can take some idea to develop my application.

my mail id is pratsha2402@yahoo.com