In this paper, we propose a sequential algorithm that separates cochannel time-division multiple-access (TDMA) signals that encounter multipath interference and noise. The receiver employs a multistage architecture where each stage consists of a beamformer and an equalizer that isolates one source, compensates for intersymbol interference (ISI), and demodulates the data. A problem encountered w...

In bit-patterned media recording (BPMR) systems, the degraded system performance is often caused not only by the intertrack interference (ITI) and the intersymbol interference (ISI), but also by insertion/deletion errors. This insertion/deletion error is one of the major problems in BPMR systems. Therefore, we propose an iterative decoding scheme for a BPMR system to combat the insertion/deleti...

In wideband DS/SS systems the Rake receiver is commonly used to attain a diversity gain by taking advantage of the good correlation properties of the spreading codes in order to separate the multipath components of the received signal. However, at low spreading gains the good correlation properties of the spreading codes are lost and the Rake receiver performance is severely degraded by interpa...

Interleaving the chip-level sequence resulting from spreading before transmission in direct spread code division multiple access (DS-CDMA) systems have been reported to allow significant improvements over conventional (non chipinterleaved) DS-CDMA. This transmission scheme has been shown to be of particular interest when used in conjunction with iterative receivers, allowing performance close t...

Abstract—In this paper, we investigate the architecture and performance of a decision feedback equalizer (DFE) based multiuser receiver for asynchronous direct sequence code division multiple access (DS-CDMA) systems. The DFE consists of a feedforward filter (FFF) and a feedback filter (FBF) to combat the intersymbol interference (ISI) and multiple access interference (MAI). We use an adaptive,...

In this paper, we propose subband adaptive array processing for mitigation of both intersymbol interference (ISI) and cochannel interference (CCI) in digital mobile communications. Subband adaptive array processing employs filter banks in a front end to an adaptive array receiver. By decomposing the signals into a set of subband signals, the analysis filters enhance the correlation of multipath...

This paper proposes a new weight control method for a pre-FFT type adaptive antenna array applied to a single carrier modulation system with cyclic prefix. The weight control method is based on the maximization of the signal-tointerference-plus-noise power ratio (SINR) at the discrete frequency domain equalizer output, therefore, the proposed scheme can increase the received signal power by cap...

Relying on block-symbol spreading and judicious design of user codes, this paper builds on a recently proposed Generalized Multicarrier (GMC) quasi-synchronous CDMA system that is capable of multiuser interference (MUI) elimination and intersymbol interference (ISI) suppression with guaranteed symbol recovery, regardless of the wireless frequency selective channels. GMC-CDMA aaords an all-digit...

The orthogonal frequency division multiplexing (OFDM) is generally used in nowdays high data rate transmission. But, OFDM suffers from interchannel interference (ICI) in rapid variations of doubly selective fading channels even though it is strong at narrow band noise and intersymbol interference (ISI). So, the ICI cancellation should be done at receiver effectively. However, channel estimation...

Joint modeling and detection of a narrowband digitally-modulated signal and Co-Channel Interference (CCI) signals is considered. A PSP-based algorithm that is compatible with array measurements is described and shown to efficiently detect the desired user’s data while tracking the time-varying Intersymbol Interference (ISI) channels of the intended user and all CCI users. This algorithm yields ...