#### sherifelian

##### Newbie level 3

**fir1 matlab**

hi all ,

i am supposed to implement an Am modulator and demodulator using Matlab

i have finished the modulator already

but i have a problems in the demodulator

i make an envelope detector ( i make it manually )

but then i want to make low pass filter and i don't know how

i know fir1() and filter() but i don't know how to use them

so anybody can help ???

thanks alot