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提出并实验研究了在60GHz正交频分复用(OFDM)-光载无线通信(ROF)系统中采用压扩变换技术降低OFDM信号峰值平均功率比(PAPR),并提高系统的接收灵敏度。实验结果表明,携带基于压扩变换的2.5Gb/s60GHz的OFDM-ROF信号经标准单模光纤传输50km后,在无色散补偿和误码率为10-3的条件下,当入纤功率为12dBm时,系统接收灵敏度提高约2.3dB,并且当互补累积分布函数(CCDF)为10-4时,OFDM信号的PAPR下降约3dB。
The PAPR of OFDM signal is reduced and the receiving sensitivity of the system is improved by adopting the spread-spectrum transform technology in 60GHz Orthogonal Frequency Division Multiplexing (OFDM) -optical wireless communication (ROF) system. The experimental results show that when the OFDM-ROF signal with 2.5Gb / s 60GHz based on the spread-spectrum transform is transmitted through standard single-mode optical fiber 50km, without dispersion compensation and bit error rate 10-3, when the input fiber power is 12dBm , The system reception sensitivity is improved by about 2.3 dB, and when the complementary cumulative distribution function (CCDF) is 10 -4, the PAPR of the OFDM signal is reduced by about 3 dB.