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Creators/Authors contains: "Khan, Uzma"

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  1. ; ; (, ACM)
    This paper presents the hardware implementation of a massive Multiple-Input Multiple-Output (MIMO) transmitter for underwater acoustic (UWA) communication capable of incorporating precoding or beamforming. The transmitter consists of baseband and passband processing modules implemented on an AMD-Xilinx All Programmable System-on-Chip (AP-SoC) architecture, frontend power amplifiers, and high-frequency transducers. While the number of channels can be easily scaled, the current hardware demonstrates a 16-channel transmitter at a carrier frequency of 115 kHz. Experiments in the lab and field show that passband beamforming and precoding are successfully transmitted through the 16 transducers. The receiver signal strengths, however, deviate largely from the free-space simulation of the beam patterns due to rich multipath reflections and imperfection in element spacing and omni-directionality of the transducers. 
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