研究目的
To propose a novel region of interest (ROI) detection based digital signal processing scheme for optical camera communications (OCC) that improves signal recovery in a rolling shutter optical camera communication (RS-OCC) system and to address packet losses due to the RS-OCC bursty channel through repeated packet transmission.
研究成果
The ROI detection-based DSP scheme significantly improves signal recovery in RS-OCC systems up to 100 cm. The proposed packet repetition schemes effectively address packet losses in bursty channels, with the C-packet method showing superior performance in throughput reduction.
研究不足
The study is limited to a transmission link span of 100 cm and focuses on round-shaped sources for simplicity in ROI detection. The performance of the proposed schemes may vary with different camera models and settings.
1：Experimental Design and Method Selection:
The study employs a ROI detection algorithm for signal processing in RS-OCC systems, focusing on signal normalization and packet flow design to mitigate source shape-induced signal deformations and packet losses.
2：Sample Selection and Data Sources:
The experimental setup includes an OLED panel as the transmitter and a Huawei Honor 7 phone camera as the receiver, with a circular aperture to simplify ROI detection.
3：List of Experimental Equipment and Materials:
OLED panel (LL055RS1-64p1-OY1), Huawei Honor 7 phone camera, arbitrary waveform generator (TTi TGA12104), and a circular aperture.
4：Experimental Procedures and Operational Workflow:
The signal is transmitted in fixed-length packets with a beacon header, captured by the camera, and processed using ROI detection and normalization to recover the transmitted information.
5：Data Analysis Methods:
The impact of ROI-assisted DSP on signal recovery and packet loss reduction is analyzed through simulations and experimental measurements.
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