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The latest adaptation of the Frontier Radio, an X/Ka-band deep space implementation, has been transitioned into a finished product for Solar Probe Plus (SPP) and future missions. Leveraging the technology readiness level (TRL) 9 software-defined radio (SDR) platform successfully flown on the Van Allen Probes (VAP) mission, the Frontier Radio now brings a low-power, low-mass, yet highly radiation-tolerant...
A complete digital signal processing architecture for software defined radios (SDRs) has been developed for several NASA missions under the JHU/APL name Frontier Radio.1, 2 The design is completely integrated into a single field programmable gate array (FPGA), and includes all processing necessary to execute a variety of modulation and demodulation schemes, as well as abstract the radio hardware and...
Receiver tracking loops are implemented in software in modern space-borne radios. Software implementation allows loop designs to be modified in flight. Not only filter coefficients and gain, but also loop order and type can be modified. This flexibility enables new cognitive and autonomous capabilities. Loop designs can be optimized for each mission phase, and separate loops can be used for acquisition...
Conventional second-order Doppler tracking loops impose a tradeoff between phase noise and tracking performance. In order to maintain adequate bit-error rate, the loop bandwidth must be narrow enough that phase noise is small. However, this limits the track range, track rate, and acquisition time of the loop. The tradeoff between bandwidth and tracking capabilities can prevent communication during...
Demanding mass and power requirements across many low-cost NASA mission sets (Discovery, New Frontiers, Mars Scout, SMEX, MIDEX, and others) place a premium on lightweight, efficient, and versatile radios. A low power, low mass, modular, multi-band software-defined radio (SDR) has been developed by JHU/APL, under the name Frontier Radio, for use in communications, navigation, radio science, and sensor...
An advanced deep space microwave radio communications system has been developed for the New Horizons spacecraft that is currently headed for Pluto and beyond. The system includes two, low-power, X-band digital receivers developed to minimize power consumption. This effort was critical to the mission, as the power saved using the digital receivers was approximately equal to the power consumed by the...
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