Hi, Kumar; What if a model wants to support non-linear time domain simulation by GetWave and statistical simulation by returning a LTI approximation in Init? Thanks, Fangyi From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of C. Kumar Sent: Wednesday, October 14, 2009 4:23 PM To: ibis-macro@xxxxxxxxxxxxx; dkirsanov@xxxxxxxxxx Subject: [ibis-macro] Re: An AMI Overview i agree.. if the model modifies the init it is the only thing it should be doing. there should not be any getwave --- On Wed, 10/14/09, Danil Kirsanov <dkirsanov@xxxxxxxxxx> wrote: From: Danil Kirsanov <dkirsanov@xxxxxxxxxx> Subject: [ibis-macro] Re: An AMI Overview To: ibis-macro@xxxxxxxxxxxxx Date: Wednesday, October 14, 2009, 6:59 PM Dear colleagues, I would like to clarify one basic principle of AMI modeling, hoping that all of us agree with it. I believe that the model writer should never do a double-counting: if he modified the channel impulse response in Init() to model some effect, he should not model this effect in Getwave(). So he cannot put the “true” model in GetWave() and it’s linear approximation in Init(). If both types of behavior are expected, there should be two models (or some internal flag that changes the behavior of the model). If this assumption is true, statistical (linear) simulator always works with Init() function of the model, while pattern-dependent (non-linear) simulator works with both Init() and GetWave() and I do not see any necessity for Get_Wave_Exists flag. Best, Danil