matlab help!

hiphop2009 SG

anyone noes how to use matlab?

i am asked to write a program but hor....i dunnoe! arrrr......

anyone can help?

hisoka SG

what you want to do?

use their help. the matlab help is pretty extensive and quite comprehensive

hiphop2009 SG

where to find matlab help?

i hav been surfing the net but den, nt much progress...

hisoka SG

press f1? or read the help file

hiphop2009 SG

my matlab version is campus version, so means i can only use it in sch....at home cannot use....arrr....

hisoka SG

oops Laughing

nah online de

http://www.mathworks.com/access/helpdesk/help/techdoc/matlab.html

hiphop2009 SG

thanx Wink Wink Wink matlab difficult la....lol.

eagle SG

what u want to do with matlab…. haven’t say leh…

hiphop2009 SG

i dunnoe i can post my question here or nt (suppose to be a mini project) but, here is the description:

using the LMS (least mean square) algorithm, remove a 50HZ noise from the ECG signal (the ECG signal has 50 HZ noise, so u are suppose to remove it using the LMS algorithm)

deathscythe99 SG

Wow....good luck with Matlab....really MAD Laughing

deathscythe99 SG

Dun understand electronics.... Laughing

But...what is the LMS algorithm? Provided??

hiphop2009 SG

no la. we are suppose to find out wad it is!

too chim for poly student like me. Confused

eagle SG

haha... sounds similar to a lab that I need to do soon for a particular module on digital signal processing... but I haven't go and find out how to do yet... Sad

just FYI, the 50Hz noise is due to the power lines from the power source, which is at 50Hz....

Are you supposed to write something to plot a transfer function of a notch filter at 50Hz?

hiphop2009 SG

nt exactly, btw, i PM-ed you. go check it. Wink

eagle SG

think I can't help much Sad
Still not exactly sure....

The LMS algorithm for a pth order algorithm can be summarized as
Parameters:
p = filter order
u = step size

Initialisation:

Computation: For n = 0,1,2,...

Maybe initialise the details, and code out a loop in matlab?

Reference:
http://en.wikipedia.org/wiki/Least_mean_squares_filter
http://www.es.lth.se/ugradcourses/asb/CE/CE2e.pdf

hiphop2009 SG

hmmm....ok thanks a million! i discuss it further with my frenz in my grp.

eagle SG

might need to request codes from u Embarassed

I pm u if I need when I confirm what my lab is...

hiphop2009 SG

LOL. dun ask me....coz i very beginner nia... Embarassed

hisoka SG

why not just do a fourier transformt hen remove the 50 Hz component?

Herzog_Zwei SG

Aka using a bloody filter lah!!!
Which version of the campus program of matlab u using?