Link design and planning for Mars Reconnaissance Orbiter (MRO) Ka-band (32 GHz) telecom demonstration

Shambayati, S.; Davarian, F.; Morabito, D. D.

doi:10.1109/aero.2005.1559447

Cited by 15 publications

(10 citation statements)

References 4 publications

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“…Based on the established weather availability requirement and the associated loss value, link analysis is performed to establish the data rate that meets the link margin policy. For the Mars Reconnaissance Orbiter (MRO) operational Ka-band demonstration, the weather availability used for link analysis is 90% [7]. For the Lunar Reconnaissance Orbiter (LRO) mission, the weather availability is chosen to be 95% [8].…”

Section: Weather Availability Concept and Basic Weather Modelsmentioning

confidence: 99%

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Statistical Ka-Band Link Analysis

Cheung

2014

SpaceOps 2014 Conference

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2 -Ka-band link performance is dominated by weather effects, both in terms of atmospheric attenuation and atmospheric noise temperature increase. Weather effects are inherently statistical, and Kaband weather effects have higher uncertainty compared to the S-band and X-band counterparts. As such, the Gaussian assumption that simplifies statistical link analysis for S-and X-bands might not be valid, and computational-intensive convolution of probability density functions are needed for link analysis. The weather effects, whether individual or aggregated, can be easily measured but difficult to characterize as parametric probability distribution functions. To simplify the analysis, the current statistical link analysis approach uses the worst-case weather loss as a deterministic value to evaluate the link performance, which results in a conservative link design. Using sound statistical principles, this paper describe a simple link analysis approach that integrates the Gaussian components of a link directly with the empirical Ka-band weather data from direct measurements This approach removes the artificial conservatism of the current approach, and yields a lower and tighter upper bound of the received power required to close the link in a statistical sense. We illustrate this technique and compare with the current approach on link analysis using the antennas and weather measurements of the three DSN sites in Goldstone, Canberra, and Madrid. NomenclatureP T N 0 = total power signal-to-noise ratio EIRP = effective isotropic radiator power G/T = gain over system noise temperature k = Boltzmann's constant (1.38 x 10 -23 J/K) L s = space-loss T sys = system noise temperature T atm = atmospheric noise temperature L atm = atmospheric attenuation θ = elevation angle CD = weather availability (in %) T p = mean atmospheric temperature L tot dB = total weather loss (in dB) m = mean σ = standard deviation l CD = a deterministic number that corresponds to the value of L dB tot (θ ) such that Prob[ L tot dB (θ ) ≤ l CD ] = CD

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Section: Weather Availability Concept and Basic Weather Modelsmentioning

confidence: 99%

“…5 For example, the Ka-band low-noise-amplifier has system noise temperature of approximately 25 K. 6 In contrast to the standard approach that uses worst-case values. 7 For DSN, the typical downlink margin policy is two-sigma.…”

Section: Introductionmentioning

confidence: 99%

Statistical Ka-Band Link Analysis

Cheung

2014

SpaceOps 2014 Conference

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“…The structure of H p leads to the systematic linear-time encoding scheme depicted in Figure 1, where D denotes a unit delay, 0 6 h 6 m 1, h 2 N, and H T u denotes the transpose of H u . Thus, the parity part of a codeword p is obtained by multiplying the information vector u by H T u and feeding the resulting vector v into a rate-1 recursive encoder, designed according to (2). The codeword c is then obtained concatenating u and p, that is, c D OEujp.…”

Section: Binary Generalized Irregular Repeat-accumulate Codesmentioning

confidence: 99%

“…Recent studies on RF higher bands (e.g., Ka-band) [1] have shown significant improvements in this respect. For example, the orbiter (employed) in the Mars Reconnaissance Orbiter mission [2] implemented a mixed payload with transponders in X-band and Ka-band: the latter was able to offer up to few megabit per second when the relay mode was enabled. The counter side is that the efficiency of higher RF bands is strongly affected by atmospheric conditions (e.g., rain in Ka-band [1]) and loss of signal synchronization, which can drastically reduce the available bit rate.…”

Section: Introductionmentioning

confidence: 99%

Recent findings on erasure codes for space communications

Garrammone

Cola

Matuz

et al. 2014

Satell Commun Network

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SUMMARYImplementation of automatic repeat request strategies is the main reliability option available in the Consultative Committee for Space Data Systems protocols to support data communications in deep‐space missions. The large latency often experienced in such scenarios, however, penalizes the efficiency of retransmissions, making the overall applicability of automatic repeat request problematic. On the contrary, the use of erasure codes is a more appealing solution to mitigate packet losses. In this regard, preliminary studies on the use of binary low‐density parity‐check codes under maximum likelihood/iterative decoding have already shown the performance benefit they can bring with respect to traditional schemes based on retransmissions. This paper extends the analysis conducted in previous studies toward non‐binary low‐density parity‐check codes. Performance assessment is carried out with respect to reliability metrics (codeword error rate) and encoding/decoding complexity. Finally, the integration of erasure codes into the Consultative Committee for Space Data Systems protocol stack is discussed, by presenting the implementation in the Licklider Transmission Protocol. Copyright © 2014 John Wiley & Sons, Ltd.

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“…As a primary means for satisfying increasing demands for high data rate services, such as a return for short-turnaround operational data, as well as delay-tolerant bulk, the development of Ka-band (32 GHz) capability will increase the bandwidth available to support advanced mission concepts [1]. However, compared with the L/S/X band, data transmission over the Ka-band channel is highly vulnerable to weather impairments.…”

Section: Introductionmentioning

confidence: 99%

CFDP-based two-hop relaying protocol over weather-dependent Ka-band space channel

Yang

Jiao

et al. 2015

IEEE Trans. Aerosp. Electron. Syst.

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In this paper, we propose a novel relaying protocol based on the Consultative Committee for Space Data Systems File Delivery Protocol (CFDP) over a weather-dependent Ka-band channel, which exploits a dual-hop link instead of the traditional single-hop link for a 100% file delivery service on scientific data return. We designed the specific model of the proposed protocol and provide the analytical results on the expected latency and link efficiency of the file delivery. Based on the proposed model, we discuss the exact location of the relay node that could minimize the expected file delivery delay by examining several practical relay locations for the proposed protocol. The simulation results show that, compared with the traditional CFDP, the proposed file delivery protocol could effectively reduce the total file delivery time by several orders of astronomical units and enhance link efficiency with noticeable increments, especially under conditions of high bit error rates (above 10 −5 ).

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Link design and planning for Mars Reconnaissance Orbiter (MRO) Ka-band (32 GHz) telecom demonstration

Cited by 15 publications

References 4 publications

Statistical Ka-Band Link Analysis

Statistical Ka-Band Link Analysis

Recent findings on erasure codes for space communications

CFDP-based two-hop relaying protocol over weather-dependent Ka-band space channel

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