Title :
Optimum receivers for non-linearly distorted OFDM signals in wireless-over-fiber applications: Impact of antenna noise
Author :
Oliveira, João M B ; Rodrigues, Miguel R D ; Salgado, Henrique M.
Author_Institution :
Inst. de Eng. de Sist. e Comput. do Porto - UTM, Univ. do Porto - DEEC, Porto
Abstract :
In this paper, we study the effect of uplink noise on the optimality of the receiver structure proposed in [1][2]. This optimum receiver is composed by a demodulator that extracts a set of sufficient statistic, and by an ML detector that uses the demodulator output to estimate the original data. We concentrate on Intensity modulation-direct detection (IM/DD) radio-over-fiber (RoF) uplink system when OFDM signals suffer from noise generated by the antenna and photodiode and from nonlinear distortion. The results show that for small and medium modulation index values, the uplink noise maintains its Gaussian distribution and the optimum receiver still outperforms the conventional.
Keywords :
Gaussian distribution; OFDM modulation; demodulators; photodiodes; radio receivers; radio-over-fibre; Gaussian distribution; RoF uplink system; antenna noise; demodulator; medium modulation index; modulation-direct detection; nonlinear distortion; nonlinearly distorted OFDM signal; optimum receiver; orthogonal frequency division multiplexing; photodiode; radio-over-fiber uplink system; uplink noise; wireless-over-fiber application; Data mining; Demodulation; Detectors; Intensity modulation; Maximum likelihood estimation; Noise generators; Nonlinear distortion; OFDM modulation; Receiving antennas; Statistics;
Conference_Titel :
Ultra-Wideband, 2008. ICUWB 2008. IEEE International Conference on
Conference_Location :
Hannover
Print_ISBN :
978-1-4244-2216-6
Electronic_ISBN :
978-1-4244-1827-5
DOI :
10.1109/ICUWB.2008.4653393
