We present a signal space partitioning technique for realizing the optimal Bayesian decision feedback equalizer (DFE). It is known that when the signal-to-noise ratio (SNR) tends to infinity, the decision boundary of the Bayesian DFE is asymptotically piecewise linear and consists of several hyperplanes. The proposed technique determines these hyperplanes explicitly and uses them to partition t...

Setup Introduction A. Challenges in High Speed Serial Link Design B. Signal Restoration using a Decision Feedback Equalizer (DFE) Preliminaries A. Opening Sue2 Schematics B. Running CppSim Simulations Plotting Time-Domain Results A. Output signal plots B. Output signal Eye Diagrams C. RMS Jitter Examining Non-Idealities A. Intersymbol Interference (ISI) B. Reflections C. Non-Linearity and Offse...

In most commercial wideband code division multiple access (W-CDMA) systems, the transmitted signal in the downlink channel is spread by orthogonal codes to accommodate different users. However, frequency selective fading destroys the orthogonality and causes multiple access interference (MAI). The rake receiver has been proposed for a receiver in the downlink channel. Although providing reasona...

The turbo equalizers (TEQ) proposed in literature utilize equalizers based on trellis, soft Wiener filters. The resulting complexity of these equalizers is exponential and cubic in terms of the sampled channel impulse response (CIR). The interference cancellation based decision feedback filter based equalizers requires adaptation of two filters simultaneously. In this paper, a low complexity eq...

A decision feedback equalizer (DFE) with correct tap weights operating on’a noisy channel is considered. We show how the results concerning a noiseless channel can he extended to yield tight bounds on the stationary error Probability performance for the noisy case. The effect of noise on DFE performance is classified according to the noise distribution and the channel parameters.

This paper presents some results and conjectures dealing with channel equalization. For several possible equalizers, the following question is considered: if the equalizer output sequence has identical statistics to the input signal sequence, has the equalizer correctly converged? 1. THE PROBLEM DOMAIN Many communication signal processing problems envisage a transmitted sequence a0 a1, ... draw...

The electrical compensation of chromatic dispersion and polarization mode dispersion in a coherent optical system exploiting polarization multiplexing is discussed in this paper. The benefits of combining a phase estimation algorithm with a decision directed least-mean-square equalizer in a feedback configuration is reported.

An enhanced adaptive decision feedback equalizer (ADFE) is presented for binary data transmission applications wher e the communication channel exhibits nonlinear intersymbol interference (ISI). The nonlinearity in the channel manifests itself as a distorted constellation space constructed from the equalizer input state variables. Since a conventional ADFE can construct a hyperplane decision bo...

This paper presents a technique to mitigate multiple access interference (MAI) in multicarrier code division (MC-CDMA) wireless communications systems. Although under normal circumstances the MC-CDMA system can achieve high spectral efficiency and resistance towards inter symbol (ISI) however when exposed substantial nonlinear distortion issue of MAI manifests. Such results power amplifiers are...