標題: Estimation of the Bit Error Rate for Direct-Detected OFDM Signals With Optically Preamplified Receivers
作者: Peng, Wei-Ren
Feng, Kai-Ming
Willner, Alan E.
Chi, Sien
光電工程學系
Department of Photonics
關鍵字: Bit error rate (BER);direct detection;optical fiber communication;orthogonal frequency division multiplexing (OFDM);optical modulation
公開日期: 15-May-2009
摘要: In this paper, we provide a numerical bit error rate (BER) estimation approach for direct-detected orthogonal frequency division multiplexing (OFDM) signals in the presence of optical preamplified receivers. The individual BER of each subcarrier is first computed by considering their electrical signal-to-noise ratio (SNR), and then the ensemble BER is derived simply by taking the average of all the subcarriers' BERs. The calculated BER is verified by the conventional error-counting approach with high precision and is still accurate with higher quadratic-amplitude modulation (QAM) formats, even under the influences of the optical filtering and polarization mode dispersion (PMD) effects. Based on our simulation approach, the required extra power budget for 16- and 64-QAM relative to 4-QAM format are found to be similar to 3.8 and 8.2 dB, respectively, at a BER of 10(-9) Furthermore, we use this approach to compare the receiving sensitivities and PMD tolerances for the previous proposed gapped and interleaved radio-frequency (RF)-tone-assisted OFDM systems. The results show that the gapped OFDM has a better sensitivity while the interleaved OFDM has a more PMD-tolerable capability.
URI: http://dx.doi.org/10.1109/JLT.2008.2012173
http://hdl.handle.net/11536/7229
ISSN: 0733-8724
DOI: 10.1109/JLT.2008.2012173
期刊: JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume: 27
Issue: 10
起始頁: 1340
結束頁: 1346
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