外差直检光正交频分复用系统中的低采样接收
摘要
A method of multi-channel receiving for high bit rate heterodyne direct-detection optical orthogonal frequency-division-multiplexing (OOFDM) system is proposed to reduce the sampling rate demand of analog-to-digital converter (ADC). The sampling rate of ADCs can be reduced to 1/N that of the original signal bandwidth in an N -channel receiving system. Aided by a succeeding digital signal processing (DSP) at the receiver, aliasing free signal can be recovered. A back-to-back experimental result is given for a 4-channel system, based on which, a down conversion process for heterodyne can be reduced. The signal rebuilding algorithm is given and analyzed in its complexity and noise tolerance.
引用本文（GB/T 7714）
Lin Cheng, He Wen, Xiaoping Zheng, 等. 外差直检光正交频分复用系统中的低采样接收[J]. Chinese Optics Letters, 2010.
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