i ACKNOWLEDGEMENT In writing this master thesis, we would like to gratefully acknowledge the help and support received from teachers and friends, both past and present, without whom this paper would have been a much poorer offering. First of all, our gratitude goes out to Ali Behravan, our thesis supervisor. He gave us a lot valuable suggestions and advice and spent his time giving us some tuto...

The emulation of a nonadaptive, binary decision feedback equalizer, operating on a noiseless, finite impulse response channel by a feedforward multilayer processor is considered. This feedforward perceptron equalizer comprises a triangular array of hard-limiting processing elements. The functional similarity between the two systems is exploited to obtain a tight upper bound on the probability o...

This paper proposes a novel equalizer, termed here as Evolutionary MPNN, where a complex modified probabilistic Neural Networks (MPNN) acts as a filter for the detected signal pattern. The neurons were embedded with optimization algorithms. We have considered two optimization algorithms, Bacteria Foraging Optimization (BFO) and Ant Colony Optimization (ACO). The proposed structure has the abili...

A new architecture for digital implementation of the adaptive equalizer in Class IV partial-response maximum likelihood (PRML) channels employing parallelism and pipelining is described. The architecture was used in a prototype integrated circuit in a 1.2 pm CMOS technology to implement an eight-tap adaptive equalizer and Viterbi sequence detector which consumes a total of 70 mW from a 3.3 V su...

This paper presents the convergence analysis of a prediction based blind equalizer for IIR channels. Predictor parameters are estimated by using the recursive least squares algorithm. It is shown that the prediction error converges almost surely (a.s.) toward a scalar multiple of the unknown input symbol sequence. It is also proved that the convergence rate of the parameter estimation error is ...

This paper addresses the issue of advanced equalization methods for space-time communications over MIMO broadband wireless channel. Instead of resorting to conventional multiuser detection techniques (based on the straightforward analogy between antennas and users), we adopt a different point of view and separate time equalization from space equalization, thus introducing a higher degree of fre...

We reconsider MMSE-based time-domain equalizer (TEQ), bitrate maximizing TEQ and per-tone equalizer design for DMT transmission. It is shown that they can all be formulated either as a constrained linear or a separable nonlinear least-squares problem. These least-squares formulations are then turned into generalized eigenvalue problems that allow to establish a remarkably close relationship bet...

In this paper two methods for designing almost linear phase wave digital filters are compared. First of them is based on designing a minimum phase filter and equalizing its phase response by some all-pass equalizer. The, second one utilizes previously published method of designing'almost linear phase filters without the equalizer. Several improvements to bo? approaches are introduced and a comp...

Wideband CDMA systems with orthogonal spreading codes suffer severely due to the loss of orthogonality by multipath propagation. This yields Multiple Access Interference (MAI) which gravely reduces the performance of classical systems with Rake-receivers. In our approach we attempt to restore orthogonality again by using a fractional T-equalizer. The results are compared with a system using the...