Multiple timing offsets

Fred Marshall <fmarshallxremove_the_x@acm.org> wrote:

(snip)
> A lot usually depends on the signal design.
> For example, a RAKE receiver is based on a signal design that consists 
> of sinusoidal "chips" that are at hopping frequencies.  The order of the 
> transmitted frequencies is known at the receiver.

> In this design the same signal is passed through different delay 
> channels.  The idea is to add up all the energy.  So it's a little 
> different than your problem.  But it's likely instructive.

I just finished a post related to the question of time domain, 
and all filters working in that domain. This seems to be a filter
that is definitely time domain. An RLC filter could be described
in the time domain or, though the appropriate differential operators,
the frequency domain.

> All of the received energy is passed through a delay line structure .. 
> like a FIR filter without the summing being done.  The delays match the 
> frequency change intervals in order to line up all the frequency 
> components at the same time.  Then, there's a bandpass filter for each. 
>  Finally an incoherent or post-dectection sum is computed.

-- glen