we present in this paper a new multiuser receiver using a neural network-based decision scheme for interference suppression in Direct Sequence Code Division Multiple Access (DS-CDMA) wireless networks. This receiver is mainly made of a decision feedback functional link equalizer (DFFLE) combined with an eigenvector network. This structure well approximates a Bayesian receiver and exhibits sever...

A novel Radial Basis Function Network (RBFN) assisted Decision-Feedback aided Space-Time Equalizer (DF-STE) designed for receivers employing multiple antennas is introduced. The proposed receiver structure outperforms the linear Minimum Mean-Squared Error benchmarker and it is less sensitive to both error propagation and channel estimation errors.

Design equations are presented for a robust realizable decision feedback equalizer, for FIR channels with uncertain channel coeecients and white noise. The mean MSE averaged over the class of channels is minimized. An example using a robust DFE for a fading GSM-channel is presented.

The radio interface EDGE (Enhanced Data rates for Global Evolution) is currently being standardized as an evolutionary path from GSM and TDMA-IS136 for third-generation high-speed data wireless systems. For the EDGE system with multiple antennas, spatial-temporal equalization (STE) can reduce intersymbol interference and co-channel interference, thereby increasing the capacity and range. In thi...

An importance sampling (IS) simulation technique is presented for evaluating the lower-bound bit error rate (BER) of the Bayesian decision feedback equalizer (DFE) under the assumption of correct decisions being fed back. A design procedure is developed, which chooses appropriate bias vectors for the simulation density to ensure asymptotic efficiency of the IS simulation.

Harashima and Miyakawa [I] and Tomlinson [2] have described a generalized partial response technique which achieves the performance of the decision-feedback equalizer without the error propagation problem. We show here that when the equalized and baud-rate sampled channel assumes the special rational z transform M g;zi i-0 F ( 2 ) =

An iterative block decision feedback equalizer (IB-DFE) for single carrier modulation is proposed. Filtering operations are implemented by discrete Fourier transforms (DFTs) which yield a reduced computationals complexity, for both filter design and signal processing, when compared to existing DFEs. Moreover, the new IB-DFE allows to cancel, besides postcursors, also the precursors of the iters...

In this paper, an equalization algorithm based on soft–decision feedback, designed for transmission with square QAM constellations is introduced. The algorithm employs a minimum mean–squared error (MMSE) filter in each iteration in order to refine the data estimates. The rule for generating soft decisions is adapted continuously to the current state of the algorithm. It is shown that the algori...

We investigate the use of an antenna array at the receiver in FDMA/TDMA systems, to let several users share one communication channel within a cell. A decision feedback equalizer which simultaneously detects all incoming signals (multiuser detection) is compared to a set of decision feedback equalizers, each detecting one signal and rejecting the remaining as interference. We also introduce the...

A multibeam beamformer in combination with a decision feedback equalizer is considered for the base station in a single-cell 100-Mb/s TDMA/TDD QPSK indoor wireless network at 24 GHz. The outage rate in terms of required SNR/bit/antenna is estimated using a statistical, clustered propagation model and for beam selection diversity and two-beam combining.