From Event: SPIE Optical Engineering + Applications, 2016
Laser based radio communication system, i.e. OptoRadio, using Orthogonal M-ary PSK Modulation scheme is presented in this paper. In this scheme, when a block of data needs to be transmitted, the corresponding block of biorthogonal code is transmitted by means of multi-phase shift keying. At the receiver, two photo diodes are cross coupled. The effect is that the net output power due to ambient light is close to zero. The laser signal is then transmitted only into one of the receivers. With all other signals being cancelled out, the laser signal is an overwhelmingly dominant signal. The detailed design, bit error correction capabilities, and bandwidth efficiency are presented to illustrate the concept.
Sunil Kumar Gaire, Saleh Faruque, and Md. Maruf Ahamed, "OptoRadio: a method of wireless communication using orthogonal M-ary PSK (OMPSK) modulation," Proc. SPIE 9979, Laser Communication and Propagation through the Atmosphere and Oceans V, 99790D (Presented at SPIE Optical Engineering + Applications: August 30, 2016; Published: 19 September 2016); https://doi.org/10.1117/12.2237962.
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