Comtech EF Data CLO-10 - Manual (Page 34)

CLO-10 Link Optimizer Revision 1
Introduction MN/CLO-10.IOM
1.6.3 System Functionality
Carrier-in-Carrier
®
achieves its cancellation performance due to its ability to automatically adapt
to dynamic system impairments.
Figure 1-6 shows a simplified conceptual block diagram of CnC processing. The two ends of the
link are denoted 'A' and 'B', and the uplink and downlink are shown. As depicted here, a variety
of dynamic system impairments must be considered for CnC application. Their effects must be
minimized in order to realize sufficient cancellation of the user’s own uplink signal. The
cancellation process adds a small amount of degradation to the existing link (tenths of a dB)
under various signal conditions.
Figure 1-6. Conceptual Block Diagram
This performance is achieved through advanced signal processing algorithms that provide superior
cancellation while tracking and compensating for the following common link impairments:
• Time varying delay. In addition to the static delays of the electronics and the round-trip
delay associated with propagation to the satellite and back, there is a time-varying
component due to movement of the satellite. CnC tracks and compensates for this
variation.
• Frequency offset and drift. Common sources are satellite Doppler shift, up/down
converter frequency uncertainties, and other drift associated with the electronics in the
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