Arnold J M
Opt Lett. 1996 Jan 1;21(1):30-2. doi: 10.1364/ol.21.000030.
Amplitude-shift keying modulation of solitons is subject to limited capacity because of Gordon-Haus noise and soliton interaction. It is shown theoretically that the capacity can be increased beyond this limit by recoding of the modulation. The design strategy is to make the pulse train strongly interacting, which reduces the Gordon-Haus noise, and to apply subband coding to counter the effects of the information dispersion caused by the strong intersoliton interaction; the subband-coded complex is pulse-position modulated onto the soliton stream. An example shows a 2.35-times improvement in capacity at the transatlantic distance of 6000 km with this method.
由于戈登-豪斯噪声和孤子相互作用，孤子的移幅键控调制容量有限。从理论上表明，通过调制的重新编码，容量可以增加到超过这个限制。设计策略是使脉冲序列具有强相互作用，这会降低戈登-豪斯噪声，并应用子带编码来抵消由强孤子间相互作用引起的信息色散的影响；子带编码复合体被脉冲位置调制到孤子流上。一个例子表明，使用这种方法在6000公里的跨大西洋距离上容量提高了2.35倍。
