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Lightweight Onboard Doppler Compensation for Satellite Communications
A NASA software catalog entry available for reuse or request.
About this technology
Overview
This VHDL module runs on a spacecraft's software-defined radio to reduce the effects of Doppler on wireless commnuications. The module implements a linear frequency sweep in the opposite direction of predicted Doppler shift to null out its effects on transmitted or received signals. Designed with resource-constrained transceivers in mind, minimal FPGA resources (e.g. less than 1% of Virtex 7 resources) are used.