Near-Optimal Low-Complexity Sequence Detection for Clipped DCO-OFDM

作者：Tan, Jiandong^*; Wang, Zhaocheng; Wang, Qi; Dai, Linglong

来源：IEEE Photonics Technology Letters, 2016, 28(3): 233-236.

DOI：10.1109/LPT.2015.2493169

• Visible light communication (VLC)
• dc-biased orthogonal frequency-division multiplexing (DCO-OFDM)
• maximum likelihood sequence detection (MLSD)
• clipping distortion

The inherent high peak-to-average power ratio issue of dc-biased optical orthogonal frequency division multiplexing (DCO-OFDM) is sensitive to the limited dynamic region of light emitting diode component and prone to clipping distortion, which deteriorates the performance of visible light communication systems. This letter proposes a maximum likelihood sequence detection (MLSD) method for the clipped DCO-OFDM, whereas the double-sided clipping characteristic is incorporated to improve the performance. Besides that, a near-optimal low-complexity MLSD method is presented to reduce the calculation complexity. Simulations demonstrate that the proposed low-complexity MLSD receiver could approach the performance of ideal case of non-clipped DCO-OFDM.

• 出版日期2016-2-1
• 单位清华大学