Shipboard radio frequency propagation measurements for wireless networks

Estes, D.R.J.; Welch, Thad B.; Sarkady, Antal A.; Whitesel, Henry K.

doi:10.1109/milcom.2001.985798

Cited by 28 publications

(25 citation statements)

References 12 publications

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“…In (Estes et al, 2001), measurement campaigns were carried out on board various naval vessels to verify the feasibility of intra-and inter-compartment radio communications. The measurement results have shown that ship bulkheads severely decrease the power of received signals of about 20-30 dB but communication through two or three bulkheads is found to be still possible.…”

Section: Related Workmentioning

confidence: 99%

Application of Wireless Sensor Network for the Monitoring Systems of Vessels

Kdouh¹,

Zaharia²,

Brousseau³

et al. 2012

Wireless Sensor Networks - Technology and Applications

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Additional information is available at the end of the chapter http://dx.doi.org/10.5772/48276 IntroductionWireless Sensor Networks (WSNs) have gained worldwide attention in recent years, particularly with the proliferation of Micro-Electro-Mechanical Systems (MEMS) technology which has facilitated the development of smart sensors. Smart sensors are small devices composed of one or more sensors, a memory, a processor, a power supply and a radio unit. They can sense the environment, measure and send data wirelessly to control unit for further processing and decisions. WSNs have great potential for many applications such as habitat monitoring (Polastre et al., 2004), intrusion detection and target tracking and surveillance (Arora et al., 2004), oceanography (Tateson et al., 2005), environmental monitoring (Barrenetxea et al., 2008a(Barrenetxea et al., , 2008bPadhy et al., 2005;Selavo et al., 2007), structural health monitoring (Paek et al., 2005), infrastructure monitoring (Stoianov et al., 2007), precision agriculture (Langendoen et al., 2006), biomedical health monitoring (Gao et al., 2005), and hazardous environment exploration and seismic sensing (Werner-Allen et al., 2006). Structures, including bridges, buildings, dams, pipelines, aircraft, ships, among others, are complex engineered systems that ensure society's economic and industrial prosperity. Monitoring systems have been implemented for these structures to monitor their operation and behaviour against incidents. The monitoring system is primarily responsible for collecting the measurement output from sensors installed in the structure and storing the measurement data within a central data repository. To guarantee that measurement data are reliably collected, structural monitoring systems employ wires for communication between sensors and the repository. While wires provide a very reliable communication link, their installation in structures can be expensive and labour-intensive. With the emergence of wireless sensor technologies, industrial and academic groups have started to investigate the feasibility of WSN Wireless Sensor Networks -Technology and Applications 286 to replace the current wired monitoring systems (Lynch et al., 2006). Ships constitute an important part of modern systems widely used in armed conflicts and commercial purposes such as fishing and transporting passengers and cargos. Ships manufacturers and navy companies aim to use automation on board ships as much as possible in order to improve security and reduce the number of crew members. Modern ships are equipped with automatic monitoring systems which control and ensure the safety and accuracy of the whole ship operation. Current shipboard monitoring systems use extensive lengths of cables to connect several thousands of sensors to central control units. Tens of kilometres of cables may be installed on board a ferry-boat, increasing its cost, weight and architecture complexity. In addition to the high cost of wires installation during ships construction, vessels represent a complex...

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Section: Related Workmentioning

confidence: 99%

Application of Wireless Sensor Network for the Monitoring Systems of Vessels

Kdouh¹,

Zaharia²,

Brousseau³

et al. 2012

Wireless Sensor Networks - Technology and Applications

View full text Add to dashboard Cite

show abstract

“…In the literature, majority of the research done on propagation on board ships focuses on same-level and short distance communication links [8][9][10][11][12]. In [8][9][10], narrowband channel measurement results are presented. In [8], received power level of signals transmitted in the frequency band of 800 MHz to 2500 MHz between two adjacent compartments within a naval ship was examined.…”

Section: Introductionmentioning

confidence: 99%

“…In [8][9][10], narrowband channel measurement results are presented. In [8], received power level of signals transmitted in the frequency band of 800 MHz to 2500 MHz between two adjacent compartments within a naval ship was examined. It was concluded that the source of bulkhead penetration are the rubber door gaskets and other non-conductive structures, such as hatch seals and insulation around pipes.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Propagation Along a Lift Shaft in Two Complex Environments

Lee

2012

PIER B

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Abstract-Signal variation caused by motions along the lift shaft in a campus environment and on board a ship is compared. The guiding effect is common for both lift shafts, and the variation in amplitude of the guided signals is more significant for the lift shaft with larger dimensions. Unlike the lift shaft within the campus, the ship with its lift shaft forms a 'waveguide within waveguide' structure. Therefore, the reflected signals within the ship enclosure outside the lift shaft are significantly affected by the motion along the lift shaft. Due to the difference in the degree of the signal variations in these two environments, the rms delay spread is found to be closely related to the lift door status and the lift car position in the campus environment, whereas it is not significantly affected by the motions along the lift shaft in the ship environment. From the statistical study and comparison of the signal variations in the two environments, the Weibull probability density function is found to be the most suitable model to describe analogous waveguide channels such as the lift shaft and the ship enclosure.

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“…The ship vessel that consists of mainly metallic structures is one of the radio frequency (RF) harsh environments of research interest. Samelevel propagation onboard a ship has been investigated by both narrowband and wideband channel characterization in [1]- [5]. In [1]- [3], narrowband channel measurement results are presented.…”

Section: Introductionmentioning

confidence: 99%

Performance of a Relay System for Two Extreme Ends of a Vessel at 2.4 GHz

Mao

Lee

2011

Antennas Wirel. Propag. Lett.

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Due to the complex metallic environment onboard a vessel, it is difficult to establish a communication link in the ISM frequency band of 2.4 GHz between the two extreme ends of the vessel, i.e., the bridge room and the engine control room (ECR). Therefore, in this letter, a relay system is proposed to overcome the difficulty. The cargo hull with its analogous waveguide structure is found to be a good location for relay. The cargo hull's structure demonstrates wave guiding effect that is able to enhance radio wave propagation. Wideband channel sounding has been conducted over two independent links of a relay system: from the bridge room to the cargo hull, and from the cargo hull to the ECR. Based on the measured impulse responses, channel performances such as average received power, root mean square (rms) delay spread, and ray decay factor are studied and compared for the two links. A maximum usable bandwidth of 0.5 MHz can be achieved without using any equalizer at 2.4 GHz. Although this bandwidth is small, it is sufficient for the transmission of low-data-rate images.Index Terms-24 GHz, multipath, relay, ship propagation, waveguide effect.

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Shipboard radio frequency propagation measurements for wireless networks

Cited by 28 publications

References 12 publications

Application of Wireless Sensor Network for the Monitoring Systems of Vessels

Application of Wireless Sensor Network for the Monitoring Systems of Vessels

Comparison of Propagation Along a Lift Shaft in Two Complex Environments

Performance of a Relay System for Two Extreme Ends of a Vessel at 2.4 GHz

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