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In this paper, we compare the lower bounds on the channel capacity of asymmetrically and symmetrically clipped optical (ASCO)-OFDM and asymmetrically clipped DC biased optical (ADO)-OFDM for an additive white Gaussian noise (AWGN) channel with an average transmitted optical power constraint. The lower bound of channel capacity can be obtained by calculating the maximum mutual information between transmitter...
In this paper, we propose a novel scheme of orthogonal frequency division multiplexing (OFDM) for intensity modulation direct detection (IM/DD) optical systems. By using this novel scheme of an OFDM optical system, not only odd subcarriers but also even subcarriers can be modulated to transmit a clipping optical signal. A conventional asymmetrically clipping optical (ACO)-OFDM is applied to modulate...
In this paper, we propose an improved receiving technique for the asymmetrically and symmetrically clipping optical (ASCO)-OFDM intensity modulation direct detection (IM/DD) wireless communication system. In the ASCO-OFDM modulation scheme, the asymmetrically clipping optical (ACO)-OFDM symbols are modulated onto the odd subcarriers, and the symmetrically clipping optical (SCO)-OFDM symbols are modulated...
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