Mars Technology Program Communications and Tracking Technologies for Mars Exploration

Antsos, D.

doi:10.1109/aero.2006.1655778

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…Based on prior-work at KSU and NASA JPL during the Mars Technology Program [30], ICE Corporation [31] is working toward a low-mass, low-power, small-volume product that can be derived from the Mars Technology research results. This unit can accept RFICs based on KSU's main radio and can support an optional custom-designed 1 watt companion power amplifier to form a medium-power UHF radio asset.…”

Section: B Uhf Radio Assets For Scout Missionsmentioning

confidence: 99%

Biomedical sensing and wireless technologies for long duration EVAs and precursor scout missions

Day

Dong

Kuhn

et al. 2014

2014 IEEE Aerospace Conference

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This paper summarizes a coordinated set of research efforts to support human and robotic missions to lunar, asteroid, and outer solar system destinations. Research areas include 1) selection and development of biosensors for astronauts engaged in long-duration, strenuous extra-vehicular activities, 2) sensor placement and operation inside spacesuits with minimal impact and maximum configurability using wireless links, 3) sensors powered using energy harvesting techniques and low-power network designs, and 4) application and maturation of UHF radio hardware to support these activities and the missions they enable.

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Section: B Uhf Radio Assets For Scout Missionsmentioning

confidence: 99%

Biomedical sensing and wireless technologies for long duration EVAs and precursor scout missions

Day

Dong

Kuhn

et al. 2014

2014 IEEE Aerospace Conference

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“…Time, (ns) In the frequency domain, the input pulse is (2) for positive frequencies, f> O. The parameters!c and B may be selected so that the pulse excites the circuit-under test with spectral energy that spans UHF, X-band, or any ultra-wide bandwidth.…”

Section: Time-frequency S-p Arameter Extractionmentioning

confidence: 99%

“…This robot, like its predecessors, relays its data to earth using Ultra-High-Frequency (UHF) and X-band frequencies [1]. Currently, in order to transmit using mUltiple frequency bands, multiple antennas are mounted on a single platform [2], as illustrated in Fig. l(a).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of an ultra-wideband diplexer for simultaneous UHF and X-band operation using modulated Gaussian pulses

Eisenach

Mazzaro

2015

SoutheastCon 2015

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Multi-band antennas are rarely well-matched between feed point and transceiver when the antenna bands are separated by more than an octave. Often, multiple antennas, each assigned its own band, are substituted for a single antenna when the frequency ratio is prohibitively large.To realize a common multi-frequency architecture, the antennas and transceiver are linked by a multi-band matching network. Dual band radio-frequency matching networks currently achieve frequency ratios up to approximately 6:1. RF networks designed to operate in two bands whose frequencies differ by more than 6:1 are not yet well-established. In this paper, an ultra-wideband diplexer is presented as the matching network to achieve operation at X-band and UHF frequencies at a ratio of 7:1.Dual-band operation is demonstrated in simulation using a time frequency technique: modulated Gaussian-envelope pulses ported between Matlab, PSpice, and Fourier-transformed to calculate scattering parameters.

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“…Wireless communications systems have enabled us to widen our horizons and conquer previously insurmountable barriers. Space exploration and missions to Mars and other planets employing deep-space radio communication [7], [8] are shining examples of the advancements made in wireless systems. With increasing applications the demand of increased capacity and support of higher data rates is omnipresent.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Redundant residue number system based space-time block codes

Sengupta

Natarajan

2014

Physical Communication

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Space-time coding (STC) schemes for Multiple Input Multiple Output (MIMO) systems have been an area of active research in the past decade. In this thesis, we propose a novel design of Space-Time Block Codes (STBCs) using Redundant Residue Number System (RRNS) codes, which are ideal for high data rate communication systems. Application of RRNS as a concatenated STC scheme to a MIMO wireless communication system is the main motivation for this work. We have optimized the link between residues and complex constellations by incorporating the "Direct Mapping" scheme, where residues are mapped directly to Gray coded constellations. Knowledge of apriori probabilities of residues is utilized to implement a probability based "Distance-Aware Direct Mapping" (DA) scheme, which uses a set-partitioning approach to map the most probable residues such that they are separated by the maximum possible distance. We have proposed an "Indirect Mapping" scheme, where we convert the residues back to bits before mapping them. We have also proposed an adaptive demapping scheme which utilizes the RRNS code structure to reduce the ML decoding complexity and improve the error performance. We quantify the upper bounds on codeword and bit error probabilities of both Systematic and Non-systematic RRNS-STBC and characterize the achievable coding and diversity gains assuming maximum likelihood decoding (MLD). Simulation results demonstrate that the DA Mapping scheme provides performance gain relative to a Gray coded direct mapping scheme. We show that Systematic RRNS-STBC codes provide superior performance compared to Nonsystematic RRNS-STBC, for the same code parameters, owing to more efficient binary to residue mapping. When compared to other concatenated STBC and Orthogonal STBC (OSTBC) schemes, the proposed system gives better performance at low SNRs.

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Mars Technology Program Communications and Tracking Technologies for Mars Exploration

Cited by 6 publications

References 14 publications

Biomedical sensing and wireless technologies for long duration EVAs and precursor scout missions

Biomedical sensing and wireless technologies for long duration EVAs and precursor scout missions

Evaluation of an ultra-wideband diplexer for simultaneous UHF and X-band operation using modulated Gaussian pulses

Redundant residue number system based space-time block codes

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