Buoy-to-ship experimental measurements over sea at 5.8 GHz near urban environments

Abstract

Abstract-Current marine wireless communication systems used for monitoring applications based on buoys suffer from lots of weakness. Many research works concern the design and development of new technological applications to improve marine communications. Particularly, a wireless communication system based on WiMAX standard at the 5.8 GHz band (license-exempt band) could be a good candidate. As an initial task, a propagation channel measurement campaign in maritime environments was carried out to investigate the impact of the wireless channel in different situations. This work provides large scale path loss measurements over sea around urban environments. In particular, a radio link between a buoy and a ship at 5.8 GHz is studied. NLOS (Non-Line-Of-Sight) paths are investigated in depth and they are compared to LOS (Line-Of-Sight) paths. The designed measurement system is described and the experimental measurements are shown. An empirical model is obtained using these experimental data and the key wireless channel parameters are analyzed. In addition, the empirical model is compared to the free space and two-ray theoretical models. This investigation is useful, among others, for planning Worldwide Interoperability for Microwave Access (WiMAX) networks offshore around these challenge environments.Propagation channel measurements; Sea; WiMAX; urban environments;

Measuring and estimating the propagation path loss and shadowing effects for Marine Wireless Sensor Networks at 5.8 GHZ

“…4. Moreover, the results expected from the two-ray model for vertical polarization transmission are also shown as a reference [12]. The differences between the measurement results and the results expected by the theoretical model can be explained according to the propagation environment.…”

Propagation measurements of a 4G LTE network in Lagoon environment

“…Knowing the influence of pathloss on the effective propagation of network signals, these models have been utilized by network engineers and designers to make reasonable propagation loss predictions, which in turn aid network design, and planning (Ajose and Imoize, 2013). These models include free space model (Rappaport, 1996;Seybold, 2005), Stanford University Interim (SUI) model (Abhayawardhana et al, 2005), Okumura-Hata model (Hata, 1980), Lee model (Aragon-Zavala, 2008), Ericsson model (Milanovic et al, 2007), Weissberger model (Weissberger, 1982;Seybold, 2005), COST 231-Hata model (Seybold, 2005;Abhayawardhana et al, 2005;Aragon-Zavala, 2008), Erceg model (Erceg et al, 1999), and ECC-33 model (Abhayawardhana et al, 2005;Philips et al, 2013). Here, it should be noted that a great number of these models have been tested with impactful results.…”

“…Results showed that the COST 231-Hata model and the SUI model showed the most accurate predictions in the urban and sub urban environments, respectively. Reyes-Guerrero et al, (2011) presents buoy-to-ship experimental measurements over sea at 5.8GHz near urban environments. Measurements were carried out by transmitting a 30 dBm continuous wave (CW) from an antenna installed on a buoy and receiving this signal in a receiver installed aboard a ship.…”

“…In this paper, measured pathloss is compared with five pathloss models; free space pathloss (Rappaport, 1996;Seybold, 2005;Aragon-Zavala, 2008;Ubom et al, 2011), logdistance model (Seidel and Rappaport, 1992), two-ray model (Philips et al, 2013), SUI model (Abhayawardhana et al, 2005;Sulyman et al, 2016), and COST 231 Hata model (Seybold, 2005;Aragon-Zavala, 2008). The goal is to identify and optimize the most accurate model for improved performance in the investigated environment and validate the accuracy of the optimized model for improved pathloss prediction in the tested environments.…”

Ship-to-land broadband channel measurement campaign at 5.2 GHz

“…One possible approach to gain knowledge about the wireless propagation channel is to conduct channel measurement campaigns. In the recent years some channel measurement campaigns were performed for maritime scenarios [1], [2], [3], [4], [5], [6], [7], [8]. However, these measurements were conducted with small bandwidth (maximum 20 MHz) and therefore, with low delay-resolution.…”