The decorrelating detector and the linear minimum mean-square error (MMSE) detector are known to be effective strategies to counter the presence of multiuser interference in code-division multiple-access channels; in particular, those multiuser detectors provide optimum near-far resistance. When training data sequences are available, the MMSE multiuser detector can be implemented adaptively wit...

A study of the application of blind adaptive Minimum Mean Square Error (MMSE) and Parallel Interference Cancellation (PIC) multiuser detection techniques to Wideband Code Division Multiple Access (WCDMA), the physical layer of Universal Mobile Telecommunication System (UMTS), has been performed as part of the Freeband Adaptive Wireless Networking project. This study was started with an analysis...

Recently, blind multi-user detection has become an important topic in code division multiple access (CDMA) systems. Direct-Sequence Spread Spectrum (DSSS) signals are well-known due to their low probability of detection, and secure communication. In this article, the problem of blind multi-user detection is studied in variable processing gain direct-sequence code division multiple access (VPG D...

objective: the present study aimed at investigating the relationship between attachment styles and self-efficacy in blind and non-blind female high school students in tehran. methods: the statistical population consisted of all female students studying in grades one or two in tehran girl’s high schools, in the academic year 2014. the study design was causal-comparative, conducted on 120 subject...

Blind adaptive Minimum Mean Square Error (MMSE) detection is theoretically one of the most promising multiuser detection techniques for cellular wireless CodeDivision Multiple Access (CDMA) systems, but its implementation has not yet been studied extensively. Therefore the goal of the research described in this paper is to study the implementation of blind adaptive MMSE detection on the current...

GOEL,VIVEK. Semi-blind turbo detection for Multiple-input Multiple-output wireless systems. (Under the direction of Dr. Huaiyu Dai) Multiple-input multiple-output (MIMO) techniques constitute the core of future high speed wireless systems. Blind detection in MIMO wireless systems conserves bandwidth and is better suited for use in multiple user scenarios. Since, most of the modern wireless comm...

background: teachers, parents and foundations should become objective-oriented for children with visual impairment so that learning and sensitization of necessary knowledge and skills for the behaviors of these children are assisted. where there is impairment in the relations of children caregivers, their emotional security is disturbed and its effects will appear in their behaviors. therefore,...

In this paper, a new spreading scheme, which consists of two stages of spreading, is considered for DS-CDMA systems. The data of a user is spread first with a long signature sequence and then with a short signature sequence. The scheme combines the advantages of the two types of spreading techniques and allows us to suppress MAI by performing both beamforming and multiuser detection efficiently...

Given a set of images, whose pixel values can be considered as the components of a vector, it is interesting to estimate the modulus of such a vector in some localised areas corresponding to a compact signal. For instance, the detection/estimation of a polarized signal in compact sources immersed in a background is relevant in some fields like astrophysics. We develop two different techniques, ...