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can't these somehow help you ? **broken link removed**
do you have basic construction to repeat ?
Almost forget, if you need to delay receiver's correlator pulse compared to transceiver's - there is implementation in Linear's technology AN 94 giving adjustable ( potentiometer) delay - 30nanosec to +300 nanosec in opamp slew rate pulse generator (360 picosec rise time). But that could unstable for precision MIR measurements .