In this paper we have studied adaptive equalization in the GSM (Global System for Mobile communications) environment using radial basis function (RBF) networks. Equalization is here considered as a classification problem, where the idea is to map the received complex-valued signal into desired binary values using RBF network equalizer. Results prove that the RBF network provides very good bit e...

A novel noncoherent receiver for M{ary di erential phase shift{keying (MDPSK) signals transmitted over intersymbol interference (ISI) channels is presented. The noncoherent receiver consists of a linear equalizer and a decision{feedback di erential detector. A signi cant performance gain over a previously proposed noncoherent receiver can be observed. For an in nite number of feedback symbols, ...

We propose a finite impulse response (FIR) minimum mean squared error (MMSE) decision feedback equalizer (DFE) for orthogonal multipulse modulated signals received through a multipath channel. Our system model accounts for both the loss of orthogonality caused by the multipath channel as well as intersymbol interference (ISI). First, we review previous work on the subject which used the zero-fo...

This paper presents a general structure for Minimum Mean Square Error (MMSE) equalizers from which we can derive instances such as the: two proposed Linear Equalizers with Extrinsic Feedback (LE-EF), Linear Equalizer (LE) and Decision Feedback Equalizer (DFE). The Extrinsic Information Transfer (EXIT) chart was used to analyze the two proposed MMSE LE-EF receivers and their characteristics was ...

In this paper, we propose a method for analysis of linear turbo equalization based on extrinsic information transfer (EXIT) charts. Given channel knowledge and therefore the optimum linear equalizer coefficients, evolution of soft information of the soft-input soft-output (SISO) equalizer can be estimated via computing bit error rates (BER) analytically. Compared to conventional analysis method...

In this paper, we propose a time-varying (TV) finite impulse response (FIR) equalizer for doubly-selective (timeand frequencyselective) channels. We use the basis expansion model (BEM) to approximate the doubly-selective channel and to design the TV FIR equalizer. This structure allows us to turn a large design problem into an equivalent small design problem, containing only the BEM coefficient...

A typical graphic equalizer frequency resolution is one-third octave comprising 31 bands. previous design based on a least-squares optimization of the band-filter gains with single second-order section per band has an accuracy 1 dB. However, always uses all filters even when small number adjusted. This letter proposes sparse one-third-octave equalizer, where active bands minimized...

We propose the adaptive minimum symbol-error rate algorithm, which is a low-complexity technique for adapting the coefficients of a linear equalizer in systems using pulse-amplitude or quadrature-amplitude modulation. The proposed algorithm very nearly minimizes error probability in white Gaussian noise and can significantly outperform the minimum-mean-squared error equalizer (by as much as 16 ...

A scheme of multichannel adaptive turbo equalizer for large delay spread sparse underwater acoustic channel is presented, with a complexity of single DSP chip implementation. Channel equalizer without input of decoder’s soft information is structured as multichannel feed-forward (FF) filter with phase lock loop (PLL), and during iterative processing with decoder, an intersymbol interference can...

A new compact line equalizer is proposed for backplane serial link applications. The equalizer has two control blocks. The feed-forward swing control block determines the optimal low frequency level and the feedback control block detects signal shapes and decides the high-frequency boosting level of the equalizer. Successful equalization is demonstrated over a 1.5m long PCB trace at 3.125-Gb/s ...