Performance Evaluation of MIMO-OFDM/OQAM in Time-Varying Underwater Acoustic Channels

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In this paper we evaluate the bit error rate (BER) performance of coded and un-coded spatially-multiplexed multiple-input multiple-output (MIMO) filter bank multi-carrier (FBMC) and Orthogonal Frequency Division Multiplexing (OFDM) systems for both horizontally and vertically configured time-varying underwater acoustic channels (UACs). OFDM/Offset Quadrature Amplitude Modulation (OFDM/OQAM) is selected as the FBMC system since it achieves maximum bandwidth efficiency. The theoretical achievable bit rates of the MIMO systems are also presented for both channel configurations. Preamble-based channel estimation using the Interference Approximation Method (IAM) is considered. We show that the MIMO-OFDM/OQAM systems achieve a better error performance and also a higher bit rate than the MIMO-OFDM systems in both the horizontal and vertical channels. This makes FBMC very attractive for wirelessly transmitting multimedia data such as real-time video in an UAC where the bandwidth is extremely limited.
Original languageEnglish
Title of host publicationOCEANS 2017 – Anchorage
Place of Publication Anchorage, AK, USA
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)9780692946909
ISBN (Print)9781509064298
Publication statusPublished - 25 Dec 2017


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