LMS algorithm implementation

I am currently doing research in Active Noise Control.  I am quite new in
this field.  I have acquired some knowledge in Adaptive filtering.  I also
read about a few daptive algorithms.  To start with I am interested to
simulate a feed forward Active Noise Control System incor****ating simple
LMS algorithm.   Anybody who has experience in this field may  please help
me  how to simulate an adaptive active noise control system by considering
random noise with some periodicity (less than 500Hz) as signal source
(Primary signal) and adaptive system incor****ating LMS algorithm to
generate secondary noise through the speaker such that destructive
interference takes place and resultant signal at the monitoring mic may be
minimized.
I have some knowledge in matlab and I can write simple matlab program, but
 I do not have any experience in simulating an adaptive system using
matlab.  If anybody know how to simulate a system like this, kindly help
me
by providing adequate matlab  sample programe and other details to
proceed.
Thanking you
Regards
Sivadasan Kottayi