Patent ID: 11965990
Assignee: RESEARCH COOPERATION FOUNDATION OF YEUNGNAM UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. A lidar sensor device comprising:
a data generation unit that generates light identification data,
an optical modulation unit that generates a plurality of modulated signals for the optical identification data by performing orthogonal frequency division multiplexing (OFDM) modulation on the optical identification data, and generates a plurality of laser signals respectively corresponding to the plurality of modulated signals and having different frequencies; and
a transmission unit that simultaneously transmits the plurality of laser signals to different measurement points according to the frequencies, respectively,
wherein the transmission unit comprises:
an optical coupler that combines the plurality of laser signals; and
a Risley prism onto which the plurality of laser signals combined by the optical coupler are incident and which transmits the plurality of laser signals by refracting the plurality of laser signals at different angles depending on the frequency,
wherein the optical modulation unit generates the plurality of modulated signals by performing fast Hartley transform (FHT)-based flip-OFDM modulation on the optical identification data.