Matlab Filter: What Does "filter(chan,data)" Do?

[oufa]

can anyone tell me please what does filter(chan,data) really works ie is it conv or what as i need inverse that operation in the reciever,
its urgent please

 

[Ecthelion]

Take a two sequences that you know what the convolution of the two will be. Then, under two separate variables find the vectors produced by the 'conv' command and then the 'filter' command. Compare the lengths of the vector outputs, then the output by graphing or manually comparing. The operation of 'filter' should become fairly obvious.