Abstract In OFDM-CDMA down link, frequency equalization is necessary at the receiver to restore orthgonality among different users. But the noise enhancement due to orthgonality restoration degrades transmission performance. In this paper, pilot-aided frequency equalization with threshold detection (TD) is presented that can effectively suppress the noise enhancement. There is an optimal thresh...

We present a design scheme to achieve equalization of Gaussian-like spectra by using linear-phase optical lattice filters. The proposed scheme separates the design of the phase response from the amplitude response of the equalization filter by introducing a symmetrically folded lattice structure. With the proposed structure, the linear-phase characteristic of the equalization filter is guarante...

Blind equalization techniques have been developed over the past three decades that estimate and equalize communication channels without requiring training sequences and without channel knowledge. This article presents a new blind equalization algorithm with particular relevance to large-order, square or rectangular constellations. Comparisons with standard blind equalization methods are also pr...

A well–known receiver strategy for a linearly modulated signal transmitted over a frequency–selective channel is channel equalization. Recently it was proposed to employ a minimum mean–squared error (MMSE) channel equalizer for the downlink of CDMA. In this paper, we introduce a new receiver concept using MMSE channel equalization as a first stage and MMSE decision–feedback equalization (DFE) u...

We consider blind equalization for block transmissions over the frequency selective Rayleigh fading channel. In the absence of pilot symbols, the receiver must be able to perform joint equalization and blind channel identification. Relying on a mixed discretecontinuous state-space representation of the communication system, we introduce a blind Bayesian equalization algorithm based on a Gaussia...

The idea of treating factor price equalization as a situation, where the distribution of factors among countries is compatible with an equilibrium in an integrated world economy, has been refined to give the so-called lens condition for factor price equalization. In this paper, we show that the lens condition may be used to give estimates for the probability of factor price equalization when fa...

Single-carrier transmission is one of the most potential options for uplink transmission in wide-area deployments. It combines the benefits of computationally simple transmitter processing and highly efficient power amplification at the terminal. Frequency-domain methods for efficient equalization can be utilized at the access point either in linear MMSE equalization or in iterative turbo equal...

This paper has discuss the various techniques for image enhancement i.e histogram equalization, Brightness preserving bi-histogram equalization(BBHE), Dualistic Sub-Image Histogram Equalization (DSIHE), Minimum Mean Brightness Error Bi-HE Method (MMBEBHE), Recursive Mean –Separate HE Method (RMSHE),Mean brightness preserving histogram equalization(MBPHE).As well as it represents the comparison ...

Abstract The literature on tax competition has argued that base equalization, which reduces regional disparities in bases, can serve as a means of internalizing horizontal and vertical fiscal externalities. This argument assumes each government relies single (a mobile capital federal savings). paper considers the case distortionary labor is also available. Internalizing externalities requires w...

Recent studies show that equalizers with different equalization delays achieve different performances. The best performed equalizer is not necessarily the one with 0-delay, and often not the case when the channel is non-minimum-phase. In this paper, a blind channel equalization algorithm is presented, by which equalizers with all possible equalization delays can be calculated simultaneously fro...