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Enabling coherent Ka-band downlink with a software-defined radio
The migration to Ka-band for science downlink on deep space missions increases data rates significantly, but also presents new challenges to radio and RF system designers. One challenge is to maintain low carrier phase noise on a coherent downlink. Thermal noise on the X-band uplink that is within the bandwidth of the carrier recovery process modulates the phase of the coherent downlink. For missions that use X-band for command uplink and Ka-band for science downlink, such as the NASA Solar Probe Plus mission, the ratio of d ...
Adams, Norman; Angert, Matthew; Copeland, David; Haskins, Christopher;
Published by: IEEE Aerospace Conference Proceedings Published on:
Additive noise; Interplanetary flight; NASA; Radio navigation; Software radio; Parker Engineering