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Subcarrier DQPSK modulated optical wireless communications in atmospheric turbulence

Subcarrier DQPSK modulated optical wireless communications in atmospheric turbulence

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Bit error rate (BER) performance is studied for a subcarrier differential quadrature phase-shift keying modulated optical wireless communication system over the Gamma-Gamma turbulence channels. A closed-form BER expression is derived using a series expansion approach. Asymptotic analysis shows that the diversity order of the considered system depends only on the smaller channel parameter.

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