Re: Spread Spectrum Correlation Question

In article <1130713507.620536.230990@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
"Ben" <ben@xxxxxxxxxxxx> wrote:


| My question is, how does the correlation peak equal the time of
| arrival? Does the time taken to correlate the signal introduce error
| into the time of arrival? Is this a real time operation or do you
| 'time-stamp' the received signal then post process it?

It typically is a real-time operation, but you still need to synchronize
the operations across the receivers. The easiest way to do this is to
periodically time-stamp the incoming signal with a common time reference
(you mention GPS), using the known sample rate to determine time offsets
for each "chip" of the signal between the periodic timestamps. Then the
correlations can occur at any time or rate, even asynchronously.

-- Tim Olson
.