Performance evaluation of filterbank multicarrier systems in an underwater acoustic channel

Abstract

General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Abstract-This paper examines the performance of filter bank multicarrier (FBMC) systems for underwater acoustic communications. We evaluate the performance of Filtered Multitone (FMT) and Orthogonal Frequency Division Multiplexing-Offset Quadrature Amplitude Modulation (OFDM-OQAM) and compare it to that of traditional OFDM. OFDM-OQAM is found to be the most suitable multicarrier technique that can be applied to underwater acoustic communications as it achieves maximum bandwidth efficiency and provides a higher bit rate than its OFDM counterpart due to the absence of a cyclic prefix (CP). We also present a bit error rate (BER) performance evaluation of coded and un-coded OFDM-OQAM for both horizontally and vertically configured acoustic channels.

Generalized frequency division multiplexing–based acoustic communication for underwater systems

“…The proposed system performance is within 1 dB of the result in Bocus et al 5 , in terms of required SNR. It may be noted that we have modelled UW attenuation in addition to HCC channel, whereas the result in Bocus et al 5 does not consider UW attenuation. To elaborate, Bocus et al 5 use the analysis of frequencydependent UW attenuation for choosing the optimum carrier frequency for a given link length.…”

“…Finally, for frequencies greater than 100 kHz, the thermal noise dominates over all other components, causing the monotonic increase in the plot. Adding all the components as mentioned in Equation (13), we get the overall noise as 3,5 N f ð Þ dB re μPa = 50−18log f ð Þ: ð14Þ…”

“…This section compares the performance of the proposed GFDM-based system with filter bank multicarrier (FBMC)based and OFDM-based systems proposed in Bocus et al 5 . FBMC is a non-orthogonal multicarrier modulation scheme and also a contender for the fifth generation (5G) of wireless mobile communication systems.…”

“…We compare the error performance of our proposed system by using identical UW channel scenarios and simulation parameters. The first case comprises a 5-tap Rayleigh fading channel with no Doppler spread, created identical to Bocus et al 5 for comparison. Figure 10 shows the BER performance of an uncoded GFDM system, with QPSK mapping, in AWGN and 5-tap Rayleigh fading channel.…”

Towards Multicarrier Waveforms Beyond OFDM: Performance Analysis of GFDM Modulation for Underwater Acoustic Channels

“…The results are compared against FBMC and OFDM implementations [23,24] for UWA channel but the performance of similar FBMC and OFDM systems is not shown in the results, rather, the reader is referred to the work of [23,24] to compare the results by themselves. The paper also lacks the performance evaluation as a function of pulse shapes and the roll off factors.…”