A Method for Underwater Wireless Data Transmission in a Hydroacoustic Channel under NLOS Conditions

Mizeraczyk, J.; Studański, Ryszard; Zak, Andrzej; Czapiewska, Agnieszka

doi:10.3390/s21237825

Cited by 5 publications

(7 citation statements)

References 21 publications

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“…The aim of this paper was to evaluate different methods for determining the Doppler factor under strong multipath conditions. The study was carried out for MFSK modulation described in [4] and the evaluation of the methods was based on the bit error rate.…”

Section: Volume XX 2017mentioning

confidence: 99%

Comparison of Doppler Effect Estimation Methods for MFSK Transmission in Multipath Hydroacoustic Channel

Czapiewska,

Łuksza,

Studański

et al. 2024

IEEE Access

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Underwater wireless communication remains a challenging topic, particularly for applications such as wreck penetration where multipath and Doppler effects are very intense. These effects are becoming even more difficult to mitigate for fast data transmission systems that utilize wideband signals. Due to the low propagation speed of acoustic wave in the water, there is a significant difference between the Doppler shift for lower and upper frequencies of the utilized spectrum. To address these challenges, this paper describes various methods for determining the Doppler frequency shift for MFSK signals, including crosscorrelation, double FFT, pilots, and additional Up-Down chirp signals. The reception quality of the transmitted data in a real environment was used as an evaluation criterion for each method. The tests were carried out in motion within the towing tank for different movement speeds of the transmitter relative to the receiver. The tank's limited dimensions created conditions for multipath signal propagation. Under very difficult multipath signal propagation conditions, the pilots method was found to be the most effective. It gave over two times lower BER than the well-known Up-Down chirp method.

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Section: Volume XX 2017mentioning

confidence: 99%

Comparison of Doppler Effect Estimation Methods for MFSK Transmission in Multipath Hydroacoustic Channel

Czapiewska,

Łuksza,

Studański

et al. 2024

IEEE Access

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“…Many localization methods are presented in the literature [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. There are two ways to locate a sensor in WSNs: (1) range-based and (2) range-free methods.…”

Section: Introductionmentioning

confidence: 99%

“…Besides LOS location methods, performance analysis in terms of CRLBs is also provided in the literature [ 16 , 17 , 18 ]. Non-line-of-sight (NLOS) presents a major problem in determining accurate location in WSNs, prompting the development of many positioning methods [ 19 , 20 , 21 , 22 ] and CRLBs [ 23 , 24 , 25 ] for NLOS propagation in the literature.…”

Section: Introductionmentioning

confidence: 99%

“…Although many studies are reported for both range-based and range-free location methods [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ], they are all based on a one-spot measurement model, as shown in Figure 1 . Since the existing location methods have been widely studied, it is difficult to improve their positioning accuracy further.…”

Section: Introductionmentioning

confidence: 99%

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Mobile Location in Wireless Sensor Networks Based on Multi Spot Measurements Model

Chen¹,

Huang

et al. 2022

Sensors

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The localization of sensors in wireless sensor networks has recently gained considerable attention. The existing location methods are based on a one-spot measurement model. It is difficult to further improve the positioning accuracy of existing location methods based on single-spot measurements. This paper proposes two location methods based on multi-spot measurements to reduce location errors. Because the multi-spot measurements model has more measurement equations than the single-spot measurements model, the proposed methods provide better performance than the traditional location methods using one-spot measurement in terms of the root mean square error (RMSE) and Cramer–Rao lower bound (CRLB). Both closed-form and iterative algorithms are proposed in this paper. The former performs suboptimally with less computational burden, whereas the latter has the highest positioning accuracy in attaining the CRLB. Moreover, a novel CRLB for the proposed multi-spot measurements model is also derived in this paper. A theoretical proof shows that the traditional CRLB in the case of single-spot measurements performs worse than the proposed CRLB in the case of multi-spot measurements. The simulation results show that the proposed methods have a lower RMSE than the traditional location methods.

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“…Increase the efficiency of data transmission on mobile networks such as VANETs. In recent years, opportunistic networks based on MANET's Ad-Hoc Mobile network have provided better solutions to complex social network data transmission problems (Fang et al, 2021;Mizeraczyk et al, 2021). There are several points to consider: the volume of traffic, the mode of data transmission employed, and the designation as a case study.…”

Section: Introductionmentioning

confidence: 99%

Addition of Neighbors in the Number of Vanets Node Factors: DSR-PNT Performance Study

Yudistira¹,

Anggoro²,

Shiddiqi³

2022

JOWUA

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Vehicular Ad Hoc Networks (VANETs) are part of Mobile Ad Hoc Networks (MANETs). Vehicles that become a node in VANETs move quickly, and speed is variable to change the topology quickly. One of the most prevalent challenges in VANETs is vehicle connection and picking the most appropriate vehicle to act as an intermediate between the sender of the packet and the destination to decide the node. The most suitable technique for communicating nodes requires research in creating the most desirable nodes as forwarders. Vehicle speed, acceleration, the direction of movement, and vehicle quality are examples of these factors. Futures Total Weight Route (TWR) may determine the ideal route from source to destination if these three characteristics at each neighbor node are known. This study discusses the impact of adding a parameter—the neighbor node on the routing metric in determining the value of TWR. The contribution of this research is to improve the performance of data packet transmission by adding a neighbor node on a DSR-PNT in the selection of routing nodes (node forwarder, next hop) to increase the PDR (packet delivery ratio). TWR provides the reference parameter (Speed, Acceleration, Link Quality) most prioritized continuously according to the changing scenario and node condition.

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A Method for Underwater Wireless Data Transmission in a Hydroacoustic Channel under NLOS Conditions

Cited by 5 publications

References 21 publications

Comparison of Doppler Effect Estimation Methods for MFSK Transmission in Multipath Hydroacoustic Channel

Comparison of Doppler Effect Estimation Methods for MFSK Transmission in Multipath Hydroacoustic Channel

Mobile Location in Wireless Sensor Networks Based on Multi Spot Measurements Model

Addition of Neighbors in the Number of Vanets Node Factors: DSR-PNT Performance Study

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