Burst-Error-Propagation Suppression for Decision-Feedback Equalizer in Field-Trial Submarine Fiber-Optic Communications

Mitigating error propagation effects in a decision feedback equalizer

We present an approximate analysis approach to the computation of probability of error and mean burst error length for a decision feedback equalizer (DFE) that takes into account feedback of decision errors. The method uses a reduced-state Markov model of the feedback process and is applicable to linear modulation formats. We use this technique to analyze a DFE design that mitigates the effects...

Propagation of Highly Chirped Pulses in Fiber-Optic Communications Systems

The propagation of strongly chirped pulses in an amplified fiber-optic communications system is experimentally investigated. Spectral narrowing of the pulses is observed. The narrowing is attributed to interplay between the initial chirp and the nonlinearity in the transmission line. Four-wave mixing (FWM) between wavelength channels is found to be similar to that for unchirped nonreturn-to-zer...

A wide-band radial basis function decision feedback equalizer-assisted burst-by-burst adaptive modem

The performance of radial basis function-based decision feedback equalized (RBF DFE) burst-by-burst adaptive quadrature amplitude modulation (AQAM) is presented for transmissions over dispersive wide-band mobile channels. This scheme is shown to give a significant improvement in terms of the mean bit error rate (BER) and bits per symbol (BPS) performance compared to that of the individual fixed...

Mitigating Error Propagation of Décision Feedback Equalization in Broadband Communications

Inter-symbol interférence is the main obstacle in reliable digital communications. Except for the spécial partial response signaling system, ISI must be suppressed as much as possible in order to obtain reliable digital communications. In wideband digital com­ munication, equalization is one of the main techniques to reverse ISI channel. Décision feedback equalizer is a popular structure becaus...

Fiber - Optic Communications