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Synchronization is considered an important design issue for the implementation of digital television (DTV) receiver, specially for proper reception of multipath distorted signal at low signal to noise ratio (SNR). This challenge is more pronounced in complex multipath channel scenarios and for high mobility applications in presence of carrier frequency offset (CFO). In this paper, time domain correlation...
This paper presents a multi-drug chemotherapy scheduling method for cancer treatment using multi-objective optimisation technique. Cancer cells, very often, grows resistance to a drug if it is administered alone for a long time and drug resistance eventually causes failure to treatment in most cases. The adaptation of multi-drug treatment in cancer increases the drug performance by reducing the drug...
This paper describes an evaluation of Inhibition/Enhancement (In/En) network for noise robust automatic speech recognition (ASR). In articulatory feature based speech recognition using neural network, the In/En network is needed to discriminate whether the articulatory features (AFs) dynamic patterns of trajectories are convex or concave. The network is used to achieve categorical AFs movement by...
The objective of this project is to build a character recognition system, which is able to recognize printed and handwritten character from A to Z. the typical optical character recognition systems, regardless the character's nature, are based mainly on three stages, preprocessing, features extraction, and discrimination. Each stage has its own problems and effects on the system efficiency which is...
Gene Regulatory Network (GRN) is an abstract mapping of gene regulations in living cells that can help to predict the system behavior of living organisms. In this research, we use a model based inference method to reconstruct GRN from gene expression data. We use linear time variant model which is of particular interest among all other models because of its capability of discovering the non-linear...
Divergence algorithm is a statistical segmentation approach which finds segmentation point via detection of abrupt changes without any previous information of the acoustic signal. The approach could get high match of segmentation but also gives a lot of false segmentation points. This work introduced a property based on the usage of Zero Crossing Rate (ZCR) in enhancing segmentation by divergence...
Cooperative communication has been considered as a promising method for benefiting the advantages from MIMO (multiple-input multiple-output) system for single antenna mobiles in the wireless network, and many important milestones in this area have been achieved, leading to a flurry of research activity. Especially, cooperative communication in wireless sensor networks (WSNs) has gained so much interest...
Face recognition is considered as a high dimensionality problem. To handle high dimensionality, a numerous methods have been proposed in literature. In this paper, we propose a novel face recognition method that efficiently solves that problem using MPEG-7 edge histogram descriptor. To the authors' knowledge, this is the first attempt to use edge histogram descriptor in face recognition. Although...
Over the years significant research has been performed for automated, i.e. machine vision based fabric inspection systems in order to replace manual inspection, which is time consuming and not accurate enough. Automated fabric inspection systems mainly involve two challenging problems, one of which is defect classification. The amount of research done to date to solve the defect classification problem...
This paper presents a simple and computationally efficient method for plant species recognition using leaf image. This method works only for the plants with broad flat leaves which are more or less two dimensional in nature. The method consists of five major parts. First, images of leaf are acquired with digital camera or scanners. Then the user selects the base point of the leaf and a few reference...
Modern signal processing applications invoke various evolutionary algorithms in different areas such as aerodynamic shape optimization, pattern recognition, digital filter design, automated mirror design etc. Presently, Differential Evolution (DE) algorithm has proved to be quite efficient in these areas. Digital filters of various kinds can be designed using this particular evolutionary technique...
3rd Generation Partnership Project Long Term Evolution (3GPP LTE) has adopted orthogonal frequency division multiple access (OFDMA) as downlink and single carrier frequency division multiple access (SC-FDMA) as uplink for multiple access scheme. SC-FDMA is adopted in uplink due to its low peak to average power ratio (PAPR). To reduce PAPR in OFDMA, several techniques are used in literature. SC-FDMA...
The performance of wireless LANs is greatly affected by path loss, RF interference and other sources of signal attenuation in addition to network congestion. The primary factors involved in effective real-time communication, namely delay and loss, must be within certain controlled limits in such a scenario. In this paper, we analyze the various factors driving IEEE 802.11b access points through extensive...
Cognitive radio (CR) has been proposed as a promising and effective technology to improve radio spectrum utilization. The primary objective of the CR is to handle the non-interference rules with any primary users (PUs). Highly sensitive and optimal spectrum sensing detectors are required in order to avoid harmful interference to PUs. Multitaper spectrum seems to be the most appealing one for spectrum...
In this paper, a Gaussian multiple input multiple output multiple eavesdropper (MIMOME) channel is considered where a transmitter communicates to a receiver in the presence of an eavesdropper. We present a technique for determining the secrecy capacity of the multiple input multiple output (MIMO) channel under Gaussian noise. We transform the degraded MIMOME channel into multiple single input multiple...
This paper deals with the performance analysis (i.e., Symbol Error Rate) of M-ary Phase-shift-keying (M-PSK) and M-ary Quadrature Amplitude Modulation (M-QAM) to transmit information using Selection Combining (SC) diversity technique over flat Rayleigh communication channel with Orthogonal Frequency Division Multiplexing (OFDM). It is well known that the multipath fading phenomenon is an inherent...
We evaluate performance of hierarchical network (overlay-underlay cellular system) based on convolution method under mixed offered traffic. In most of the cases, different offered traffic of a network follows different probability density functions and they are correlated in sharing channel environment and cannot be analyzed by equivalent random theory (ERT) model. Here, three different types of offered...
This paper, proposes a Radio Network Planning for Fixed WiMax Network for Dhaka City. To develop the plan a cell radius of 400 meter is assumed. For the justification of this assumption several numbers of experimental analyses are done. Two experiments are executed to know the data speed with respect to the distance both for uplink and downlink communication. Another two experiments are executed for...
Next generation wireless networks will be heterogeneous, where several primary users (PU e.g. licensed users) and secondary users (SU e.g. unlicensed users) can operate in the same dynamic and reconfigurable networks at a given time. The major challenge in this heterogeneous radio environment is to enable the coexistence between PU and SU which will further improve the efficient use of radio spectrum...
The goal of this paper is to validate a formulae, originally derived to calculate the throughout upper bound of the IEEE 802.11 networks, over a single Access Point (AP) based WLAN system combined with the IEEE 802.11e EDCA mechanism. In this paper some important assumptions are made to keep the formulae very simple. The most important assumption is that, the AP is providing service to client nodes...
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