부산대학교 도서관

Acoustic-communication-based intelligent devices attract attention for their simplicity and cost-effectiveness. Still, there is a lack of research on acoustic communication solutions that can simultaneously balance low Bit Error Rate(BER), inaudible sound, low power consumption, high throughput, and operate on embedded devices. This paper proposes an acoustic communication framework based on Chirp Spread Spectrum (CSS) modulation technology, which can accomplish reliable acoustic communication on common MCU such as stm32 and ESP32. Our proposed Custom Rolling Matching Encoding (CRME) protocol matches complex acoustic channel states with a vote-queue algorithm. It performs reliable low-rate acoustic communication in a low signal-to-noise ratio (SNR) environment. Results show that the framework has surpassed technologies such as Bluetooth Low Energy (BLE) and Radio-frequency Identification (RFID) in terms of BER, power consumption for device usage, and communication distance: BER is below 0.5% at a 272 bps data reception rate. Also, the framework can be deployed on embedded devices, consumes less power than RFID, and performs similarly to BLE, providing an alternative to cost-effective acoustic communication.