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提出了一种基于小波包变换正交码的多电平正交编码的无源光网络(PON)中上行信号复用和传输新方法,将PON系统中各个不同的光网络单元(ONU)用户用小波变换正交码来进行调制、复用和传输,能够实现各个不同ONU用户共享一个波长。由于采用了小波变换编码,可以实现数量很多ONU用户同时上行,在ONU端不需要突发光模块以及多波长激光器,因而成本低,传输速率高,接入数量多。给出了基于该方法的上行系统调制、复用和传输的结构模型,并仿真了传输速率为1.25Gb/s和10Gb/s下不同路ONU用户上行传输,仿真结果表明,最大可以实现上行32路,每路10Gb/s,总传输速率达到320Gb/s的高速PON系统。
A new method of uplink signal multiplexing and transmission in PON based on wavelet packet transform orthogonal code is proposed. PON system, different optical network unit (ONU) users Use wavelet transform orthogonal code to carry on modulation, reuse and transmission, can realize every different ONU users share one wavelength. Owing to the wavelet transform coding, a large number of ONU users can be uplinked at the same time, and no burst optical module and multi-wavelength laser are needed at the ONU. Therefore, the cost is low, the transmission rate is high, and the number of accesses is large. The structure model of modulation, multiplexing and transmission of the uplink system based on this method is given and the uplink transmission of ONU users with different transmission rates at 1.25Gb / s and 10Gb / s is simulated. The simulation results show that the uplink can achieve up to 32 Road, each 10Gb / s, the total transfer rate of 320Gb / s high-speed PON system.