Title :
Performance analysis of partial pre-equalization for ACO-OFDM indoor optical wireless transmissions
Author :
Panta, Jariya ; Saengudomlert, Poompat ; Sripimanwat, Keattisak
Author_Institution :
Asian Inst. of Technol. (AIT), Pathumthani, Thailand
Abstract :
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 can reduce the transmit optical power over post-equalization for point-to-point transmissions. In addition, we consider broadcast transmissions to multiple users with possibly different channel qualities, where pre-equalization is not applicable. Finally, we specify an appropriate channel estimate at the transmitter for such broadcast transmissions.
Keywords :
OFDM modulation; channel estimation; equalisers; error statistics; indoor communication; intensity modulation; optical communication; telecommunication power management; wireless channels; ACO-OFDM indoor optical wireless transmissions; BER; asymmetrically clipped optical orthogonal frequency division multiplexing; broadcast transmissions; channel estimation; direct detection; indoor optical wireless channels; intensity modulation; optical power transmission; partial pre-equalization performance analysis; point-to-point transmissions; post-equalization; Bit error rate; Delays; OFDM; Optical receivers; Optical transmitters; Wireless communication; bit error rate; equalization; optical wireless communications; orthogonal frequency division multiplexing;
Conference_Titel :
Communication Systems, Networks & Digital Signal Processing (CSNDSP), 2014 9th International Symposium on
Conference_Location :
Manchester
DOI :
10.1109/CSNDSP.2014.6923980