光通信技术2025，Vol.49Issue(5)：21-26,6.DOI:10.13921/j.cnki.issn1002-5561.2025.05.004
离散小波变换的超奈奎斯特速率无线光FBMC通信系统性能
Performance of discrete wavelet transform based fast-than-Nyquist rate wireless optical FBMC communication system
摘要
Abstract
To address the limitations imposed by Hermitian symmetry on filter bank multicarrier(FBMC)in wireless optical communication(WOC)systems,a novel scheme applying discrete wavelet transform(DWT)to optical FBMC is proposed,and faster-than-Nyquist(FTN)technology is introduced to enhance the spectral efficiency.The bit error rate(BER),peak-to-average power ratio(PAPR),spectral efficiency,and complexity of the system ae analyzed using the Monte Carlo method and compared with conventional schemes.Simulation results show that,compared with direct current biased optical(DCO)-FBMC and asym-metrically clipped optical(ACO)-FBMC,the DWT-FBMC system achieves approximately 5 dB and 2 dB SNR improvement at a BER of 10⁻⁴,and increases spectral efficiency by 1.5 bit·s⁻¹·Hz⁻¹ and 1 bit·s⁻¹·Hz⁻¹,respectively.With the introduction of FTN,the FTN-DWT-FBMC system significantly enhances spectral efficiency.关键词
无线光通信/滤波器组多载波/小波变换/超奈奎斯特Key words
wireless optical communication/filter bank multi-carrier/wavelet transform/faster-than-Nyquist分类
信息技术与安全科学引用本文复制引用
曹明华,韩生春,张悦,张霞,陈轩,张凌雲..离散小波变换的超奈奎斯特速率无线光FBMC通信系统性能[J].光通信技术,2025,49(5):21-26,6.基金项目
国家自然科学基金项目(62265010)资助 （62265010）
甘肃省自然科学基金项目(24JRRA183)资助 （24JRRA183）
山东省自然科学基金项目(ZR2022MF284)资助. （ZR2022MF284）
