The goal of this contribution is to give some insight into the cochannel interference (CCI) suppression capability of novel symbol-by-symbol-type maximum a posteriori probability single-user receivers for nonspread-spectrum multiuser narrow-band systems impaired by intersymbol interference and CCI. The presented multiuser receivers minimize the error probability in the detection of the desired ...

Orthogonal frequency division multiplexing (OFDM) technique is being applied extensively to high data rate digital transmission as it is a bandwidth efficient modulation scheme. In OFDM system, intersymbol interference (ISI) and intercarrier interference (ICI) occur due to synchronization errors. Fast, simple and robust synchronization algorithms are necessary for OFDM systems. In OFDM downlink...

The effects of multipath propagation lead to a significant decrease in system performance in most of the proposed ultra-wideband communication systems. A time-reversed system utilises the multipath channel impulse response to decrease receiver complexity, through a prefiltering at the transmitter. This paper discusses the modelling and comparative performance of a UWB system utilising time-reve...

Ultra-high density data storage has gained high significance given the increasing amounts of data; many technologies have been proposed to achieve a density. Among them, bit-pattern media recording (BPMR) is promising technology. In BPMR systems, are stored on magnetic islands. Therefore, densities can be achieved by reducing distance between Because closeness islands, readback signal distorted...

It is of great interest to provide high data rate services in wireless communication systems. In order to support such services, it is desirable to extend space-time (ST) coding, originally proposed for known, frequency-nonselective fading channels, to unknown, multipath channels. In this paper, we consider the problem of interference suppression for wireless TDMA (time division multiple access...

In this work, space-time processing for co-channel interference (CCI) reduction and intersymbol interference (ISI) equalization with antenna arrays is studied. As compared to spatial-only processing, the space-time processing proposed takes the temporal correlation of the CCI into account by modeling the noise and CCI as a Gaussian vector valued autoregressive process. This is a good approximat...

SUMMARY We propose a novel asynchronous direct-sequence code-division multiple access (DS-CDMA) using feedback-controlled spreading sequences (FCSSs) (FCSS/DS-CDMA). At the receiver of FCSS/DS-CDMA, the code-orthogonalizing filter (COF) produces a spreading sequence , and the receiver returns the spreading sequence to the transmitter. Then the transmitter uses the spreading sequence as its upda...

Relying on symbol blocking and judicious design of user codes, this paper builds on a Generalized Multicarrier (GMC) quasi-synchronous CDMA system capable of multiuser interference (MUI) elimination and intersymbol interference (ISI) suppression with guaranteed symbol recovery, regardless of the wireless frequency selective channels. GMC-CDMA provides a unifying framework for multicarrier (MC) ...

An overview on equalization schemes applicable for point-to-point communication over MIMO ISI channels is given, i.e., channels which suffer form both, multiuser interference between the data streams transmitted in parallel and intersymbol interference due to the dispersive (frequencyselective) nature of the channel. Spatial, temporal and combined spatial/temporal equalization strategies for de...