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Adaptation of the Electra radio to support multiple receive channels

Show simple item record Satorius, Edgar H. Shah, Biren N. Bruvold, Kristoffer N. Bell, David J. 2015-03-25T17:36:53Z 2015-03-25T17:36:53Z 2011-03-05
dc.identifier.citation 2011 IEEE Aerospace Conference, Big Sky, Montana, March 5-12, 2011 en_US
dc.identifier.clearanceno 10-4838
dc.description.abstract Proposed future Mars missions plan communication between multiple assets (rovers). This paper presents the results of a study carried out to assess the potential adaptation of the Electra radio to a multi-channel transceiver. The basic concept is a Frequency Division multiplexing (FDM) communications scheme wherein different receiver architectures are examined. Options considered include: (1) multiple IF slices, A/D and FPGAs each programmed with an Electra baseband modem; (2) common IF but multiple A/Ds and FPGAs and (3) common IF, single A/D and single or multiple FPGAs programmed to accommodate the FDM signals. These options represent the usual tradeoff between analog and digital complexity. Given the space application, a common IF is preferable; however, multiple users present dynamic range challenges (e.g., near-far constraints) that would favor multiple IF slices (Option 1). Vice versa, with a common IF and multiple A/Ds (Option 2), individual AGC control of the A/Ds would be an important consideration. Option 3 would require a common AGC control strategy and would entail multiple digital down conversion paths within the FPGA. In this paper, both FDM parameters as well as the different Electra design options will be examined. In particular, signal channel spacing as a function of user data rates and transmit powers will be evaluated. In addition, tradeoffs between the different Electra design options will be presented with the ultimate goal of defining an augmented Electra radio architecture for potential future missions. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2011 en_US
dc.subject Frequency Division multiplexing en_US
dc.subject Time Division multiplexing en_US
dc.subject data throughput en_US
dc.title Adaptation of the Electra radio to support multiple receive channels en_US
dc.type Preprint en_US

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