Bandwidth and sample frequency effects in GPS receiver correlators

In this paper, the difference in performance between using a matched filter and an integrate and dump filter to implement a correlator in a GPS receiver is studied; in case of infinite and of limited bandwidth; and in case of infinite and of finite sampling frequency. Obviously, the matched filter outperforms the much easier to implement integrate and dump filter on accuracy of synchronization and BER. But the extra hardware it takes to implement the matched filter is substantial. For off-line computer processing of IF samples, this cost is not an issue.