Demo: Underwater Video Transmission through Acoustic Communication Links.

Video transmission requires 100 kbps – 500 kbps channel capacity which presents tremendous challenges over underwater acoustic wireless channels. This demo shows a prototype of a 4-by-4 multiple-input multiple-output (MIMO) acoustic transmitter and receiver at the carrier frequency of 200 kHz, and achieves an information data rate of 100 kbps. The transmitter prototype is capable of real-time video transmission at 2 - 8 frames per second using H.264 video compression. The receiver uses a multi-core CPU for baseband processing and can achieve real-time recovery of transmitted videos with 2 frames per second. The real-time underwater acoustic video transmission system consists of a transmitter and a receiver, as shown in Figure 1 and Figure 2. The transmitter uses a CSI camera for video capture and a Jetson GPU for data processing, and a custom carrier modulator and front-end circuit for video transmission.The receiver uses a custom-designed analog front end (AFE) and a 4-channel analog-to-digital converter (ADC) for signal capture, and a Zedboard (a Field Programmable Gate Array (FPGA) development board) for high data rate recording and transmission, and a multi-core laptop for passband and baseband data processing. The demonstration will show the hardware prototypes of the system working in a water tub. The demo team will bring a water tube and would need access to a water faucet when setting up the demo. A table and an AC power outlet are also required from the conference. We would appreciate it if a large TV screen is available for us to show the received images. Otherwise, we will show it on our own laptop. We may bring a poster if there is room for it. The next subsections provide instructions on how to insert figures, tables, and equations in your document.