Measurements and characterization of ultra wideband propagation within spacecrafts

Matsubara, Atsushi; Ichikawa, Tatsuya; Tomiki, Atsushi; Toda, Tomoaki; Kobayashi, T.

doi:10.1109/lapc.2009.5352387

Cited by 16 publications

(9 citation statements)

References 9 publications

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“…To realize wireless harness communications inside confined devices, it is important to understand in advance the radiowave propagation in such environments at microwave and millimeter-wave frequencies. In [5], an ultra-wideband (UWB) signal propagation was measured and characterized in a small satellite for partially removing onboard data buses in spacecrafts. It is found from these studies [4], [5] that inmachine propagation environments are different from outdoor and indoor ones previously considered for wireless communications.…”

Section: Introductionmentioning

confidence: 99%

“…In [5], an ultra-wideband (UWB) signal propagation was measured and characterized in a small satellite for partially removing onboard data buses in spacecrafts. It is found from these studies [4], [5] that inmachine propagation environments are different from outdoor and indoor ones previously considered for wireless communications. Thus, to develop the wireless harness system inside the engine compartment of automobiles, the propagation environment needs to be made clear in detail.…”

Section: Introductionmentioning

confidence: 99%

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Microwave propagation characterization in automotive engine compartment for wireless harness communications

Ohira

Ano²,

Kitazawa³

et al. 2014

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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In this paper, the path loss in the automotive engine compartment is characterized in a frequency range from 2 GHz to 20 GHz for the development of a future wireless-harness communication enabling wireless interconnections between modules and sensors. As an important factor of the propagation, the path-loss exponent is extracted from measured frequency characteristics of the path loss. The key findings of this paper are as follows: 1) The attenuation factor for the propagation distance shows a low frequency dependency in the line-of-sight (LOS) case, while it increases from 1 to 4 as the frequency is higher in the non-line-of-sight (NLOS) case, and 2) the attenuation factor for the frequency is lower than 2 of the free-space propagation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microwave propagation characterization in automotive engine compartment for wireless harness communications

Ohira

Ano²,

Kitazawa³

et al. 2014

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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“…The benefit of wireless cable replacement is; reduction of cable weight (and launching cost as a result), more flexibility in layout of spacecraft subsystems, and reliable connections at rotary, moving, and sliding joints [1]. There still is a need for a technological solution to these types of applications, requiring a very high level of robustness and a variety of data-rates, while having a very low impact on other systems operating in their proximity.…”

Section: Introductionmentioning

confidence: 99%

UWB radio channel characterization and design for intra spacecraft communication

Heuvel

Romme

Dufour

et al. 2013

2013 IEEE International Conference on Communications (ICC)

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ESA is investigating wireless cable replacement for intra-spacecraft (IS) applications to reduce cable weight, and add flexibility to the subsystem layout. The low emission limit and robustness to highly reflective environments make UWB a potential candidate for cable replacement. Therefore, to validate these assumptions, channel measurements have been conducted in a representative spacecraft; the ESA Venus Express mockup, which is divided in separate compartments/cavities connected by openings. Channel measurements that cover the entire 3 to 10 GHz UWB spectrum, are conducted for all cavity combinations of the Venus Express. Channel statistics are derived from the measurements. Moreover, the raw channel measurements are used in a hardware-true physical layer (PHY) simulator, based on current Holst Centre -IMEC UWB hardware platform supporting IEEE 802.15.4a standard. The used hardware specification are from the non-coherent setting, employing power detection and integrate and dump in RX for easy synchronization in a highly reflective environment, insensitivity to clock jitter, and robustness against clock offsets at cost of reduced sensitivity. The PHY results correspond well to the outage probability derived from the channel measurements when taking the actual noncoherent setting receiver hardware sensitivity into account. Since most power is in the scattered power, the most dominating factor in IS UWB communication is not the actual position or distance between the antennas, but the minimum number of openings between the cavities. The low mean loss of the measured radio channel combined with the immunity of the UWB air-interface to small-scale-fading, ensures that the signal is always well above the noise floor of the non-coherent setting of the current Holst Centre -IMEC hardware.

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“…intra-machine applications to reduce cable weight and add flexibility to the subsystem layout, and e.g. body-area-network (BAN) scenarios such as ear-to-ear communication, see [3], [4] and all references therein. Our impulse radio (IR) UWB, supporting the IEEE 802.15.4a standard, is designed for low power operation (in the mW range for combined digital base band (DBB) & radio frequency (RF)).…”

Section: Introductionmentioning

confidence: 99%

Real time non-coherent synchronization method in 6–10.6 GHz IR-UWB demonstrator chipset

Heuvel

Pflug

Ramkumar

et al. 2013

2013 IEEE Global Communications Conference (GLOBECOM)

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A theoretical model for non-coherent start-of-framedelimiter (SFD) detection in IEEE 802.15.4a is presented and closed form solutions for SFD threshold and signal-to-noise ratio (SNR) estimation are derived. The derived results are implemented in an impulse radio ultra wide band (IR-UWB) demonstrator operating in the 6-10.6 GHz UWB band. The demonstrator is designed for low power operation (in the mW range for combined digital base band (DBB) & radio frequency (RF)). The transmitter (TX) RF is duty cycled at pulse level and the receiver (RX) RF is switched to pulse level duty cycling when possible. Moreover, digital TX and RX resources are only switched on when needed. Measurement results are in close agreement with the derived closed form solutions.

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Measurements and characterization of ultra wideband propagation within spacecrafts

Cited by 16 publications

References 9 publications

Microwave propagation characterization in automotive engine compartment for wireless harness communications

Microwave propagation characterization in automotive engine compartment for wireless harness communications

UWB radio channel characterization and design for intra spacecraft communication

Real time non-coherent synchronization method in 6–10.6 GHz IR-UWB demonstrator chipset

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Measurements and characterization of ultra wideband propagation within spacecrafts

Cited by 16 publications

References 9 publications

Microwave propagation characterization in automotive engine compartment for wireless harness communications

Microwave propagation characterization in automotive engine compartment for wireless harness communications

UWB radio channel characterization and design for intra spacecraft communication

Real time non-coherent synchronization method in 6&#x2013;10.6 GHz IR-UWB demonstrator chipset

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Product

Resources

About

Real time non-coherent synchronization method in 6–10.6 GHz IR-UWB demonstrator chipset