A novel blind initialization procedure for iterative decision feedback equalizers in block-based transmission systems is proposed and investigated. It relies on an initial stage using Regalia’s blockbased Constant Modulus iterative algorithm for the blind computation of a linear equalizer; then a switch to decision feedback mode is performed. It is shown how the building blocks of the decision ...

NONLINEAR EQUALIZATION BASED ON DECISION FEEDBACK EQUALIZER FOR OPTICAL COMMUNICATION SYSTEM by Xiaoqi Han Nonlinear impairments in optical communication systems have become the major performance limiting factor of optical communication systems. The equalizer based on linear filters has limited compensation capability. Therefore, nonlinear models based equalizers are proposed for performance en...

This paper presents a new kind of adaptive filter: type-2 fuzzy adaptive filter (FAF); one that is realized using an unnormalized type-2 Takagi–Sugeno–Kang (TSK) fuzzy logic system (FLS). We apply this filter to equalization of a nonlinear time-varying channel and demonstrate that it can implement the Bayesian equalizer for such a channel, has a simple structure, and provides fast inference. A ...

The ordered successive interference cancellation MIMO decision feedback equalization based on constant modulus property is obtained by canceling decided symbols from the received symbols successively with the decision feed-forward equalizer (DFE) solution as a well known expression encountered in improved log-normal error function based on CMA (ILNCMA-OSIC-DFE) adaptive algorithms. The decision...

A new iterative equalizer based on the classical block decision feedback equalizer is derived. The performance of this equalizer benefits from the usage of a soft decision function, which is based on noise whitening and consecutive matched filtering. The derivation of the decision function is very general and therefore applicable to arbitrary complex valued modulation symbols. After adding the ...

Decision feedback equalizer uses prior sensor’s decisions to mitigate damaging effects of intersymbol interference on the received symbols. Due to its inherent non linear nature, decision feedback equalizer outperforms the linear equalizer in case where the intersymbol interference is sever in a communication system. Equalization of multiple input multiple output fast fading channels is a daunt...