This paper describes an adaptive space-time receiver with joint channel and data estimation (JCD) to combat time-varying multipath channels in the presence of undesired co-channel interference (CCI). The receiver uses a colored Gaussian metric in the sequence detection to suppress the CCI. The proposed scheme also uses the knowledge of the transmit filter for improved channel estimation to enha...

Determination of the path taken by a quantum particle leads to a suppression of interference and to a classical behavior. We employ here a quantum "which path" detector to perform accurate path determination in a two-path Mach-Zehnder electron interferometer, leading to full suppression of the interference. Following the dephasing process we recover the interference by measuring the cross corre...

The present cross-sectional study aims to explore the contribution of working memory (WM) in different inhibitory abilities (i.e., response inhibition and interference suppression) in 72 children who are between 3 and 5 years of age. The results showed that response inhibition tasks are influenced by both verbal and spatial WM, whereas the interference suppression task was not influenced by WM ...

This paper addresses blind adaptive suppression of a digital narrowband interferer in direct sequence spread spectrum (DSSS) communications.. We apply an adaptive suppression method for wideband interference proposed by Honig, Madhow and Verdd [1] to a narrowband interferer. We identify the eigenspaces of the system dynamics to: 1) significantly decrease convergence times via a new constraint o...

In this paper, a novel Independent Component Analysis (ICA) algorithm is proposed with application to interference suppression in diversity receivers. For mobile and wireless communications, the new technique is an efficient baseband digital interference rejection method that results in simplified analog front-end. Simulations are performed for BPSK receivers assuming time-varying conditions. T...

Signal distortions in communication systems occur between the transmitter and the receiver; these distortions normally cause bit errors at the receiver. In addition interference by other signals may add to the deterioration in performance of the communication link. In order to achieve reliable communication, the effects of the communication channel distortion and interfering signals must be red...

Despite the seemingly irreducible simplicity of Witsenhausen’s counterexample, the optimal control law for the problem is not yet known. It has been observed that the counterexample contains an implicit communication problem. We formulate a vector version of the Witsenhausen counterexample that helps simplify the problem further while preserving its essential character. The vector version of th...

Due to the scarcity of frequency allocations for emerging personal communications services, it has been proposed that spread spectrum (SS) signals be used in such services so that they can be overlaid on existing frequency band occupants. Such SS signals would be constrained in power so as not to interfere with pre-existing, narrowband users. In view of this application, suppression of strong n...

This paper proposes a novel subspace projection algorithm for impulsive interference (IMI) suppression in echo samples received by an over-the-horizon radar (OTHR). We particularly highlight the model that the frequency spectrum of IMI component is a complex cosine signal such that IMI cosine can be filtered out by subspace projection. Compared with existing algorithms, a more simple clutter su...

Interfering signals are a common nuisance in wireless communications and may cause performance loss. In addition, overlay systems where non-spread and spreadspectrum systems coexist will become more common in the future. Therefore, the need for versatile interference suppression (IS) systems increases. In conventional transform domain suppression, the interference is excised in some transform d...