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We propose partial pre-equalization for indoor optical wireless transmissions based on asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) with intensity modulation and direct detection (IM/DD). Bit loading is applied to minimize the transmit optical power for a fixed target BER. Similar to pre-equalization, for diffuse indoor optical wireless channels, partial pre-equalization...
This paper quantifies the optimal utilized bandwidth (BW) of indoor optical wireless transmission using orthogonal frequency division multiplexing (OFDM) with intensity modulation and direct detection (IM/DD) by varying the number of transmitted bits per OFDM symbol. Due to its power efficiency, asymmetrically clipped optical OFDM (ACO-OFDM) is selected as a unipolar OFDM scheme. To further improve...
This paper investigates the performance of indoor optical wireless transmissions using orthogonal frequency division multiplexing (OFDM) with intensity modulation and direct detection (IM/DD). To obtain unipolar OFDM signals compatible with IM/DD, DC biased optical OFDM (DCO-OFDM) and asymmetrically clipped optical OFDM (ACO-OFDM) are considered with DCO-OFDM as the baseline. Known to be more power...
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