In this paper we propose a parallel interference cancellation (PIC) architecture for code division multiple access (CDMA) transmission over broadband wireless channel, which makes use of a block decision feedback equalizer (DFE) to remove inter-symbol interference (ISI) and whose overall complexity is much lower than equivalent (in terms of performance) existing structures. At the receiver, aft...

OBJECTIVE The epiphyses ossification centers appear late in gestation, when traditional biometric measurements are the least accurate, and they can be useful in determining third trimesters gestational age. To evaluate fetal distal femoral epiphysis (DFE) size in various ages of gestation and establish a reference chart for Iranian population. MATERIALS & METHODS DFE diameter was measured in ...

The next generation wireless communication systems are expected to support high speed data trans mission However associated with high transmission rates is the problem of multipath inter symbol interference ISI due to frequency selective fading Decision feedback equalization DFE and antenna diversity combining are two practical techniques for combating multipath ISI In this paper we in vestigat...

In this work, a recently derived recursive least-square (RLS) algorithm to train multi layer perceptron (MLP) is used in an MLP-based decision feedback equalizer (DFE) instead of the back propagation (BP) algorithm. Its performance is investigated and compared to those of MLP-DFE based on the BP algorithm and the simple DFE based on the least-mean square (LMS) algorithm. The results show improv...

In this paper, we present a predictive neural network called Neural Predictive Coding (NPC). This model is used for non linear discriminant features extraction (DFE) applied to phoneme recognition. We also, present a new extension of the NPC model : DFE-NPC. In order to evaluate the performances of the DFE-NPC model, we carried out a study of Darpa-Timit phonemes (in particular /b/, /d/, /g/ an...

Multichannel receivers are usually employed in high-rate underwater acoustic communication to achieve spatial diversity. In the context of multichannel underwater acoustic communications, passive time reversal (TR) combined with a single-channel adaptive decision feedback equalizer (TR-DFE) is a low-complexity solution to achieve both spatial and temporal focusing. In this paper, we present a n...

Abstract: Recent years, with the rapid development of world economy, energy consumption is sharply increaseing and the environment is deteriorating. Liquefied Natural Gas (LNG), a clean renewable energy which can be used as ship fuel, is drawing attentions from more and more countries over the world. However, the conversion of the LNG-diesel dual fuel engine (DFE) in China as a new research is ...

A new algorithm of direct time domain fundamental frequency estimation (DFE) and voiced/unvoiced (V/UV) classification of speech signal is presented in this paper. The DFE algorithm consists of spectral shaping, detection of significant extremes based on adaptive thresholding, and actual frequency estimation under several truth criteria. We propose a majority criterion for V/UV classification b...

The finite-length minimum mean square error decision-feedback equalizer (MMSE-DFE) is an efficient structure mitigating intersymbol interference (ISI) introduced by practically all communication channels at high-enough symbol rates. The filters constituting the MMSE-DFE, as well as related performance measures, can be computed by assuming perfect knowledge of the channel impulse response and th...

In high density digital magnetic recording systems, the nonlinear effects in the write process appear in the readback waveform as shifts in the peak positions and changes in the amplitude. The pulse shift causes a nonlinear intersymbol interference (ISI) on the readback signal. In this paper, a Volterra-DFE, in which a Volterra filter is used in the feedback section of decision feedback structu...