This paper presents a new fading model for MIMO channels, the Jacobi fading model. It asserts that H, the transfer matrix which couples the m t inputs into m r outputs, is a sub-matrix of an m×m random (Haar-distributed) unitary matrix. The (squared) singular values of H follow the law of the classical Jacobi ensemble of random matrices; hence the name of… (More)
We study the properties of nonlinear interference noise (NLIN) in fiber-optic communications systems with large accumulated dispersion. Our focus is on settling the discrepancy between the results of the Gaussian noise (GN) model (according to which NLIN is additive Gaussian) and a recently published time-domain analysis, which attributes drastically… (More)
We analyze the achievable communication rates of a generalized soliton-based transmission system for the optical fiber channel. This method is based on modulation of parameters of the scattering domain, via the inverse scattering transform, by the information bits. The decoder uses the direct spectral transform to estimate these parameters and decode the… (More)
By taking advantage of the temporal correlations of the nonlinear phase noise in WDM systems we show that the capacity of a nonlinear fiber link is notably higher than what is currently assumed. This advantage is translated into the doubling of the link distance for a fixed transmission rate.
—Fiber's nonlinearity fundamentally bounds the achievable information rates in fiber-optic communication systems. In a wavelength-division multiplexed system it induces a nonlinear interference between adjacent channels, an interference that was recently shown to have a strong dependance on the input distribution. In this work we show that a ball shaped… (More)
We show that the effect of nonlinear interference in WDM systems is equivalent to slowly varying inter-symbol-interference (ISI), and hence its cancelation can be carried out by means of adaptive linear filtering. We characterize the ISI coefficients and discuss the potential gain following from their cancellation. Introduction The capacity of fiber-optic… (More)
—Inter-channel nonlinear interactions between adjacent channels in wavelength-division multiplexed systems are considered the predominant factor in limiting the communication rate of the fiber-optic channel. The most pronounced nonlinear effect was recently shown to manifest itself as phase noise. Interestingly, the phase rotation exhibits very long… (More)
—We study the fundamental energy consumption of fiber-optic communications links. We show that the quantum limit for the energy efficiency of a multi-span system deploying generalized on-off keying with photon-counting inline regeneration exceeds by orders of magnitude that of state-of-the-art systems employing inline optical amplification. I. Introduction… (More)