This paper studies the performance of joint Vertical Bell Laboratories layered space-time architecture (VBLAST)/Space-Time Block Coding (STBC) aided multipleinput multiple-output (MIMO) system in a multi-cell multi-user setting with multi-user transmitter preprocessing (MUTP) based on singular value decomposition (SVD), which exploits the channel state
information (CSI) of all the users at the base stations (BSs) and only individual user's CSI at the mobile stations (MS) for downlink (DL) communication. Specifically, in this contribution, in contrast to previous work [6], we study the effects of four types of delay spread on MUTP assisted joint VBLAST/STBC MIMO system over correlated and uncorrelated frequency-selective channels. In a multi-cell scenario, in addition to multi stream interference (MSI) and multi-user interference (MUI), users conflict co-channel interference (CCI) which can severely degrade the system performance. Simulation studyshows that MUTP can mitigate CCI and MSI with less detection complexity. Comparisons for correlated and uncorrelated frequency-selective channels with and without MUTP are also provided.
Keywords-Multiple-input multiple-output(MIMO); preprocessing; post-processing; multi-user transmitter preprocessing (MUTP); singular value decomposition (SVD); cochannel interference (CCI); multi-user interference (MUI); multi stream interference (MSI).
Double space-time transmit diversity (DSTTD) is currently one of the promising techniques for realizing both spatial diversity and multiplexing gains concurrently. In this paper, in contrast to previous work [6], we consider the performance of double space time transmit diversity (DSTTD) system with multi-user transmitter preprocessing (MUTP) over correlated and uncorrelated frequency-selective fading channels.
The transmitter preprocessing (TP) is realized by singular value decomposition (SVD) which exploits the channel state information (CSI) of all the users at the base stations (BSs). This scheme can greatly bring down the complexity of the mobile terminals as well as obviate the need for complex MUDs.Specifically, we investigate the effects of four types of delay spread distributions on MUTP assisted DSTTD system. In a multi-cell scenario, users conflict co-channel interferences (CCI) which can severely degrade the system performance. It is shown through simulation that multi-user transmitter preprocessing (MUTP) can mitigate CCI in addition to retaining the low complexity nature of the mobile terminals. Comparisons for correlated and uncorrelated frequency-selective channels with and without TP are also provided.
Keywords-Multiple input multiple output(MIMO), preprocessing, postprocessing, multi-user transmitter preprocessing (MUTP), singular value decomposition (SVD), double space-time transmit diversity (DSTTD), co-channel interference (CCI), multi stream interference (MSI).I.
In the modern era, the escalation of vehicles on the roads has caused an increasin g need for a reliable and intelli g ent control of the traffic li g ht system. This paper is aimed at solvin g this crisis by effectively computin g the density of traffic based on the ima g es picked up by cameras placed on the traffic posts. The method involves a simple al g orithm which performs pixel elimination and detection followed by processin g usin g a fuzzy controller. It can be further extended towards hardware implementation usin g dedicated processors. Our approach involves takin g ima g es at re g ular intervals and continuously processin g them with a reference ima g e which is captured when there is no traffic (empty road).The reference ima g es are stored and used for calibration purpose. This al g orithm enables the system to infer the traffic density which is then evaluated by a fuzzy controller to determine the timin g of the traffic si g nals. The fuzzy controller consists of an output function which dynamically controls the output based on the comparison of current ima g e's pixel count correspondin g to the vehicle density.Index Terms-Fuzzy controller, Pixel elimination and detection al g orithm, output distribution function.
The present study activity to shed light on to the role of the GLP inspections which is helps to overcoming non-compliance
activity. The objective of the present study is to identify the GLP inspection and understanding the underlying concepts for
GLP compliance for licenses pertaining to Pre-Clinical study. The study compared and contrasted the GLP requirements
and their inspection procedure of the regulatory authorities in India, EU and Singapore.
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