In recent years, explosively increasing data traffic has been boosting the con?tinuous demand of high speed optical interconnection inside or among data centers, high performance computers and even consumer electronic...In recent years, explosively increasing data traffic has been boosting the con?tinuous demand of high speed optical interconnection inside or among data centers, high performance computers and even consumer electronics. To pursue the improved intercon?nection performance of capacity, energy efficiency and simplicity, effective approaches are demonstrated including particularly advanced digital signal processing (DSP) meth?ods. In this paper, we present a review about the enabling adaptive DSP methods for opti?cal interconnection applications, and a detailed summary of our recent and ongoing works in this field. In brief, our works focus on dealing with the specific issues for short-reach interconnection scenarios with adaptive operation, including signal-to-noise-ratio (SNR) limitation, level nonlinearity distortion, energy efficiency consideration and the de?cision precision.展开更多
提出了一种无数模转换器(Digital to Analog Converter,DAC)的全数字跳频(Frequency Hopping,FH)系统。通过Δ∑调制(delta-sigma modulation,DSM),数字域中的FH模拟信号可以被转换为比特序列,然后通过I/O端口传输。与传统的模拟载波跳...提出了一种无数模转换器(Digital to Analog Converter,DAC)的全数字跳频(Frequency Hopping,FH)系统。通过Δ∑调制(delta-sigma modulation,DSM),数字域中的FH模拟信号可以被转换为比特序列,然后通过I/O端口传输。与传统的模拟载波跳频系统相比,该系统具有较低的复杂度和较高的频率选择灵活性。与现有的数字基带跳频系统相比,全数字FH系统更容易在数字信号处理(Digital Signal Processing,DSP)中实现DSM,而不是利用高采样率DAC。实验通过正交幅度调制(Quadrature Amplitude Modulation,QAM),在20 km光纤和1 m无线链路上成功实现了2.4 GHz、3.5 GHz、3.51 GHz和5.5 GHz的跳频信号的发送和接收。展开更多
基金This work was supported by National Natural Science Foundation of Chi⁃na(NSFC)under Grant Nos.61935011,61875124 and 61875049.
文摘In recent years, explosively increasing data traffic has been boosting the con?tinuous demand of high speed optical interconnection inside or among data centers, high performance computers and even consumer electronics. To pursue the improved intercon?nection performance of capacity, energy efficiency and simplicity, effective approaches are demonstrated including particularly advanced digital signal processing (DSP) meth?ods. In this paper, we present a review about the enabling adaptive DSP methods for opti?cal interconnection applications, and a detailed summary of our recent and ongoing works in this field. In brief, our works focus on dealing with the specific issues for short-reach interconnection scenarios with adaptive operation, including signal-to-noise-ratio (SNR) limitation, level nonlinearity distortion, energy efficiency consideration and the de?cision precision.
