Next Article in Journal
Visual Servoing in Robotics
Previous Article in Journal
Current Source AC-Side Clamped Inverter for Leakage Current Reduction in Grid-Connected PV System
Previous Article in Special Issue
A Signaling-Free Underwater Code Division Multiple Access Scheme
Open AccessArticle

Downlink Power Allocation Strategy for Next-Generation Underwater Acoustic Communications Networks

by Ishtiaq Ahmad 1,2 and KyungHi Chang 1,*
1
Department of Electronic Engineering, Inha University, Incheon 22212, Korea
2
Department of Electrical Engineering, Gomal University, Dera Ismail Khan 29200, Pakistan
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(11), 1297; https://doi.org/10.3390/electronics8111297
Received: 2 October 2019 / Revised: 24 October 2019 / Accepted: 27 October 2019 / Published: 6 November 2019
(This article belongs to the Special Issue Underwater Communication and Networking Systems)
The increasing interest in next-generation underwater acoustic communications networks is due to vast investigation of oceans for oceanography, commercial operations in maritime areas, military surveillance, and more. A surface buoy or underwater base station controller (UBSC) communicates with either transceivers or underwater base stations (UBSs) via acoustic links. Transceivers further communicate with underwater sensor nodes using acoustic links. In this paper, we employ a downlink (DL) power allocation (PA) strategy using an orthogonal frequency-division multiple access (OFDMA) technique for underwater acoustic communications (UAC) networks. First, we present an approach to power offsets using three kinds of pilot spacing and apply the power boosting (PB) concept on orthogonal frequency-division multiplexing (OFDM) symbols for the UAC network. Secondly, we draw the block error rate (BLER) curves from link-level simulation (LLS) and analyze the signal-to-noise ratio (SNR) for both PA and non-PA strategies. Lastly, we adopt the best PB for system-level simulation (SLS) and compare the throughput and outage performance for PA and non-PA strategies. Hence, the simulation results confirm the effectiveness of the DL PA strategy for UAC networks.
Keywords: UAC network; underwater channel model; power allocation; LLS; SLS UAC network; underwater channel model; power allocation; LLS; SLS
MDPI and ACS Style

Ahmad, I.; Chang, K. Downlink Power Allocation Strategy for Next-Generation Underwater Acoustic Communications Networks. Electronics 2019, 8, 1297.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop