Complex signal Interpolation

Hi

I am sorry for repeating my question. May be I was not clear in
explaing it before.

I have a signal given by:

s(i) = exp(-j*((2*pi*fc*(R(i))/c) + pi*slope*t.^2));

I want to interpolate this signal so that I can get values at points
given by  R(i) - a, where a is a constant.

Can anybody please suggest me any interpolation technique?

Thanks

"Anshu" <anshu.dhawan@gmail.com> wrote in message 
news:1137095522.235665.146000@o13g2000cwo.googlegroups.com...
> Hi
>
> I am sorry for repeating my question. May be I was not clear in
> explaing it before.
>
> I have a signal given by:
>
> s(i) = exp(-j*((2*pi*fc*(R(i))/c) + pi*slope*t.^2));
>
> I want to interpolate this signal so that I can get values at points
> given by  R(i) - a, where a is a constant.
>
> Can anybody please suggest me any interpolation technique?
>
It may be obvious to everyone else but not to me.  Is there any relationship 
between R(i) and t or
is t a constant for all R(i) ? is c also a constant, slope is a constant? I 
assume that fc is your carrier frequency and if all the above are constants 
then you could rewrite your equation as
s(i) = exp(-j*K*R(i)+phi) where K and phi are constants ?

Best of Luck - Mike

"Mike Yarwood" <mpyarwood@btopenworld.com> wrote in message 
news:dq6eqp$kn5$1@nwrdmz01.dmz.ncs.ea.ibs-infra.bt.com...
>
> "Anshu" <anshu.dhawan@gmail.com> wrote in message 
> news:1137095522.235665.146000@o13g2000cwo.googlegroups.com...
>> Hi
>>
>> I am sorry for repeating my question. May be I was not clear in
>> explaing it before.
>>
>> I have a signal given by:
>>
>> s(i) = exp(-j*((2*pi*fc*(R(i))/c) + pi*slope*t.^2));
>>
>> I want to interpolate this signal so that I can get values at points
>> given by  R(i) - a, where a is a constant.
>>
>> Can anybody please suggest me any interpolation technique?
>>
> It may be obvious to everyone else but not to me.  Is there any 
> relationship between R(i) and t or
> is t a constant for all R(i) ? is c also a constant, slope is a constant? 
> I assume that fc is your carrier frequency and if all the above are 
> constants then you could rewrite your equation as
> s(i) = exp(-j*K*R(i)+phi) where K and phi are constants ?
>
sorry missed some brackets - should be
s(i) = exp(-j*(K*R(i)+phi)) where K and phi are real constants and j is 
sqrt(-1) ?


> Best of Luck - Mike
>
>
>