Short-distance and near-ground signal measurements in a car park of wireless sensor network system at 433 MHz

The 433 MHz band is gaining relevance as an alternative to the 2.4 GHz band for machine-to-machine communications using low-power wireless technologies. Currently, two standards are being developed that use the 433 MHz band, DASH7 Mode 2 and IEEE 802.15.4f. The article presents propagation models based on measurements conducted at the 433 MHz and 2.4 GHz bands that can be used for link budget calculations in both outdoor and indoor environments depending on node height. The results obtained show that the 433 MHz band has a larger communication range in both indoor and outdoor environments despite the negative effects of having a larger Fresnel zone. In addition, indoor propagation measurements are conducted in line-of-sight and nonline-of-sight conditions to determine the suitability of channel hopping to combat the effects of multipath propagation. Contrary to the 2.4 GHz band, the results show that channel hopping at 433 MHz does not provide any link robustness advantage because the channel coherence bandwidth is larger than the whole band bandwidth, and thus, all channels are highly correlated.

show abstract

“…Other interesting articles related to propagation aspects at the 433 MHz and the 2.4 GHz bands in different environments include .…”

Section: Related Workmentioning

confidence: 99%

On the suitability of the 433 MHz band for M2M low‐power wireless communications: propagation aspects

Tuset-Peiró

Angles-Vazquez

López-Vicario

et al. 2013

Trans. Emerging Tel. Tech.

View full text Add to dashboard Cite

show abstract

“…As described in [6] and [7], the physical condition of an antenna transmission pattern and the associated effect on a communications link can be mathematically described in a two antenna situation. Specifically for sensor networks, [8][9][10] provide insight on measured sensor communications with various polarization properties. The end effect of these studies is insight on propagation loss under specific constraints including placement and frequency in static deployment.…”

Section: Introductionmentioning

confidence: 99%

Sensor network pair-wise wireless communications performance with unsteady node orientation

Lintz

McEachen

Jenn

2009

2009 IEEE Sarnoff Symposium

View full text Add to dashboard Cite

A model is proposed to describe expected communications performance between two sensor network nodes where both are unsteady in physical orientation with respect to a specified reference. Model application enables determination of transmit power in terms of a preferred link performance probability. Increasing applications of wireless sensor networks has proportionally increased fielding ideas and platforms. The stability of a platform for a sensor network node cannot always be assumed stable due to physical variation from motion or surface conditions. This creates a time-varying random orientation between nodes in communication with an adjacent partner. A stochastic model is proposed connecting the physical random orientation of a pair of elements to their transmission components. The resulting performance of a link using the proposed model is then applied to achieve reliable communications performance. Analysis demonstrates improved use of network power compared to a method which assigns a blanket power margin across the network.

show abstract

“…In order to understand the near ground signal propagation as well as near ground localization, related researches have been reported in the open literature [10] [11]. Hugine et al partitioned the near ground scenario into on-the-ground (OG) and above-the-ground (AG) and investigated the propagation characteristic of UWB channel [12].…”

Section: Introductionmentioning

confidence: 99%

Height dependent TOA ranging error model for near ground localization applications

Geng

et al. 2014

2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC)

View full text Add to dashboard Cite

Near ground localization is a special type of localization scenario that is widely considered in both academic and industry. A proper way to describe time-of-arrival (TOA) ranging error for near ground localization applications has been in a strong demand since early 201Os. In this paper, we proposed a mathematical model for near ground TOA ranging error based on empirical measurement. According to investigation and analysis on the empirical data, the TOA ranging error can be modeled as a Gaussian random variable and its mean and variance depends on both the antenna height and the distance between reference node and target node. To further emphasize the value of this model, Cramer-Rao Lower Bound for two dimensional (2D) near ground localization has been calculate using the proposed error model as a typical case study. It is shown that the near ground TOA ranging error model is essential for algorithm design and system performance evaluation.

show abstract

Short-distance and near-ground signal measurements in a car park of wireless sensor network system at 433 MHz

Cited by 10 publications

References 7 publications

On the suitability of the 433 MHz band for M2M low‐power wireless communications: propagation aspects

On the suitability of the 433 MHz band for M2M low‐power wireless communications: propagation aspects

Sensor network pair-wise wireless communications performance with unsteady node orientation

Height dependent TOA ranging error model for near ground localization applications

Contact Info

Product

Resources

About