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2014 International Conference on Communication and Signal Processing最新文献

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Performance of turbo coded MIMO-OFDM system for underwater communications 水下通信中turbo编码MIMO-OFDM系统的性能
Pub Date : 2014-04-03 DOI: 10.1109/ICCSP.2014.6950143
I. Nelson, K. S. Vishvaksenan, V. Rajendran
In this correspondence, we consider the performance of Multi-Input Multi-Output (MIMO) assisted multi-carrier (MC) modulated system for the transmission of the acoustic signal in underwater communications. In underwater communications, acoustic interference and ambient noise are the two major channel impairments. In our work, we consider turbo code as channel encoder and at the receiver, we employ iterative decoding algorithm to alleviate the effects of ambient noise and acoustic interference. We implement IFFT block at the transmitter and FFT block at the receiver to realize multi-carrier modulation. Particularly, we investigate the effects of eleven tap delay pertaining to shallow water model in the context of coded MIMO-OFDM system. At the receiver, we realize non-linear detector based on zero-forcing (ZF) algorithm. It is shown through simulation results that MIMO-OFDM system with ZF algorithm provides achievable bit error rate with less signal-to-noise ratio using iterative decoding algorithm..
在本文中,我们考虑了多输入多输出(MIMO)辅助多载波(MC)调制系统在水下通信中声信号传输的性能。在水下通信中,声干扰和环境噪声是两个主要的信道障碍。在我们的工作中,我们考虑turbo码作为信道编码器,在接收端,我们采用迭代解码算法来减轻环境噪声和声干扰的影响。我们在发送端和接收端分别实现了FFT块和FFT块,实现了多载波调制。特别地,我们研究了编码MIMO-OFDM系统中浅水模式下的11次抽头延迟的影响。在接收端,我们实现了基于零强迫(ZF)算法的非线性检测器。仿真结果表明,采用ZF算法的MIMO-OFDM系统采用迭代译码算法可实现误码率和较低的信噪比。
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引用次数: 3
Performance and evalution of Guassian kernals for FCM algorithm with mean filtering based denoising for MRI segmentation 基于均值滤波去噪FCM算法的高斯核性能及评价
Pub Date : 2014-04-03 DOI: 10.1109/ICCSP.2014.6950134
Nookala Venu
In this paper, a new segmentation algorithm with the integration of mean and peak-and-valley filtering based denoising and Gaussian kernels based fuzzy c-means (MPVKFCM) algorithm is proposed for medical image segmentation. First, the image is denoised by using the mean and peak-and-valley filtering algorithm. Secondly, image segmentation algorithm with Gaussian kernels based fuzzy c-means is performed on the denoised image. The performance of the proposed algorithm is tested on OASIS-MRI image dataset. The performance is tested in terms of score, number of iterations (NI), Execution time and (TM) under different Gaussian noises on OASIS-MRI dataset. The results after investigation, the proposed method shows a significant improvement as compared to other existing methods in terms of Score, NI and TM under different Gaussian noises on OASIS-MRI dataset.
本文提出了一种基于均值和峰谷滤波去噪与基于高斯核的模糊c均值(MPVKFCM)算法相结合的医学图像分割新算法。首先,采用均值滤波和峰谷滤波算法对图像进行去噪。其次,对去噪后的图像进行基于高斯核的模糊c均值分割算法;在OASIS-MRI图像数据集上测试了该算法的性能。在OASIS-MRI数据集上,对不同高斯噪声下的得分、迭代次数(NI)、执行时间(Execution time)和TM进行性能测试。研究结果表明,该方法在不同高斯噪声下的Score、NI和TM均比现有方法有显著提高。
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引用次数: 6
Motion artifacts extraction using dwt from ambulatory ECG (A-ECG) 基于dwt的动态心电图(A-ECG)运动伪影提取
Pub Date : 2014-04-03 DOI: 10.1109/ICCSP.2014.6950112
Dixit V. Bhoraniya, R. Kher
Ambulatory ECG signal monitoring is useful when long term cardiac monitoring of a patient is necessary. Ambulatory ECG (A-ECG) monitoring provides electrical activity of the heart while a person is involved in doing his or her normal routine activities. Thus, the recorded ECG signal consists of cardiac signal along with motion artifacts introduced due to person's body movements during routine activities. This motion artifact has spectral overlap with cardiac signal in 1-10 Hz which corresponds to ECG features like P wave and T wave. Detection of motion artifacts due to different physical activities (PA) might help in further cardiac diagnosis. Ambulatory ECG signal analysis for detection of various motion artifacts using discrete wavelet transform (DWT) approach is addressed in this paper. The ECG signals of healthy subjects (aged of 19 to 16 years) were recorded while the person performs various body movements activity like (i) up and down movement of left hand, (ii) up and down movement of right hand, (iii) waist twisting movement while standing and (iv) change in position from sitting down on chair to standing up movement in lead I configuration by using BIOPAC MP 36 signal acquiring system.
当需要对患者进行长期心脏监测时,动态心电图信号监测是有用的。动态心电图(a -ECG)监测提供了当一个人参与他或她的正常日常活动时心脏的电活动。因此,记录的心电信号由心脏信号以及由于人在日常活动中身体运动而引入的运动伪影组成。该运动伪影在1 ~ 10hz范围内与心脏信号有频谱重叠,对应于P波和T波等ECG特征。检测不同身体活动引起的运动伪影(PA)可能有助于进一步的心脏诊断。本文研究了用离散小波变换(DWT)方法对动态心电信号进行分析,以检测各种运动伪影。采用BIOPAC mp36信号采集系统,记录19 ~ 16岁健康受试者在进行(i)左手上下运动、(ii)右手上下运动、(iii)站立时扭腰运动、(iv)在导联1位下从椅子上坐下到站起来运动等身体运动时的心电信号。
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引用次数: 7
FPGA implementation of content addressable memory based information detection system 基于内容可寻址存储器的信息检测系统的FPGA实现
Pub Date : 2014-04-03 DOI: 10.1109/ICCSP.2014.6949980
M. Soni, P. Dakhole
CAM (content-addressable memory) is a specialized type of high-speed memory that searches its entire contents in a single clock cycle. We are designing generalized CAM using Dual Port RAM (random access memory) structure which will perform match operation in addition to read and write operation .The design has fast search capabilities while consuming least system resources as possible. CAM provides performance advantage over other search algorithms as searching is based on content rather than address unlike RAM. The match time of our CAM structure is faster and resources are more effective. CAM is used in application where search time is very critical. content addressable memory compare input search data against stored data and return address of matched data. Thus overall function of CAM is to take search word and return matching memory location.
CAM(内容可寻址内存)是一种专用类型的高速内存,它在一个时钟周期内搜索其全部内容。采用双端口RAM(随机存取存储器)结构设计通用CAM,在进行读写操作的同时进行匹配操作,在尽可能减少系统资源消耗的同时具有快速的搜索能力。与其他搜索算法相比,CAM提供了性能优势,因为搜索是基于内容而不是地址的,这与RAM不同。我们的CAM结构匹配速度更快,资源更有效。CAM用于对搜索时间要求非常严格的应用中。内容寻址存储器将输入搜索数据与存储数据和匹配数据的返回地址进行比较。因此,CAM的总体功能是获取搜索词并返回匹配的内存位置。
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引用次数: 6
Design of multicarrier pulses maximizing SINR by ISI/ICI shaping for the Doubly Dispersive channel 利用ISI/ICI整形实现双色散信道SINR最大化的多载波脉冲设计
Pub Date : 2014-04-03 DOI: 10.1109/ICCSP.2014.6950061
Jaba Deva Krupa Abel, Y. Karuna, G. Ramachandra Reddy, R. Dhuli
Multicarrier modulation (MCM) is a popularly used transmission technique. This paper aims at designing the multicarrier modulation pulse for communication over a Doubly Dispersive (DD) channel. For a DD channel, Inter Symbol Interference (ISI)Inter Carrier Interference (ICI) can be completely eliminated only when we design the pulses with the knowledge of the channel state. But for a quickly varying doubly dispersive channel, the channel state cannot be tracked by the transmitter. So instead of designing a pulse which suppresses all the ISIICI, the proposed technique designs the MCM pulses which allows a tolerable ISIICI within the target pattern and eliminates all the ISIICI outside the target pattern. By properly selecting the target pattern, it is possible to treat the allowed ISIICI by using simple equalization/decoding techniques.
多载波调制(MCM)是一种广泛应用的传输技术。本文旨在设计用于双色散信道通信的多载波调制脉冲。对于DD信道,只有在了解信道状态的情况下设计脉冲,才能完全消除码间干扰(ISI)和载波间干扰(ICI)。但对于快速变化的双色散信道,发射机无法跟踪信道状态。因此,与设计抑制所有ISIICI的脉冲不同,该技术设计的MCM脉冲在目标模式内允许可容忍的ISIICI,并消除目标模式外的所有ISIICI。通过正确选择目标模式,可以使用简单的均衡/解码技术来处理允许的ISIICI。
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引用次数: 0
Analysis of wrist pulse signals using spatial features in time domain 基于时域空间特征的腕部脉冲信号分析
Pub Date : 2014-04-03 DOI: 10.1109/ICCSP.2014.6949859
D. Rangaprakash, D. Dutt
Wrist pulse signal contains more important information about the health status of a person and pulse signal diagnosis has been employed in oriental medicine since very long time. In this paper we have used signal processing techniques to extract information from wrist pulse signals. For this purpose we have acquired radial artery pulse signals at wrist position noninvasively for different cases of interest. The wrist pulse waveforms have been analyzed using spatial features. Results have been obtained for the case of wrist pulse signals recorded for several subjects before exercise and after exercise. It is shown that the spatial features show statistically significant changes for the two cases and hence they are effective in distinguishing the changes taking place due to exercise. Support vector machine classifier is used to classify between the groups, and a high classification accuracy of 99.71% is achieved. Thus this paper demonstrates the utility of the spatial features in studying wrist pulse signals obtained under various recording conditions. The ability of the model to distinguish changes occurring under two different recording conditions can be potentially used for healthcare applications.
腕部脉搏信号包含了一个人的健康状况的更重要的信息,脉冲信号诊断在东方医学中已经应用了很长时间。在本文中,我们使用信号处理技术从腕部脉搏信号中提取信息。为此,我们在不同的病例中无创地获取了腕位桡动脉脉搏信号。利用空间特征分析了腕部脉冲波形。在运动前和运动后记录了几个受试者的手腕脉搏信号。结果表明,空间特征在两种情况下均表现出统计学意义上的显著变化,因此它们可以有效地区分运动引起的变化。采用支持向量机分类器进行组间分类,分类准确率达到99.71%。因此,本文证明了空间特征在研究不同记录条件下获得的手腕脉冲信号中的实用性。模型区分在两种不同记录条件下发生的变化的能力可以潜在地用于医疗保健应用程序。
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引用次数: 11
Automatic segmentation of neonatal brain magnetic resonance images 新生儿脑磁共振图像的自动分割
Pub Date : 2014-04-03 DOI: 10.1109/ICCSP.2014.6949920
C. N. Devi, A. Chandrasekharan, V. Sundararaman, Z. C. Alex
This paper provides an overview of magnetic resonance imaging of the neonatal brain, presents the challenges involved in segmenting the neonatal brain images and reviews the existing techniques for automatic segmentation, including atlas-based probabilistic segmentations and morphology based brain segmentation. It compares the various methods in practice and highlights their limitations, particularly the inadequacies in segmenting the myelinated portions of the brain. It also proposes a new approach to overcome these shortcomings.
本文综述了新生儿大脑的磁共振成像,提出了新生儿大脑图像分割所涉及的挑战,并回顾了现有的自动分割技术,包括基于阿特拉斯的概率分割和基于形态学的大脑分割。它比较了实践中的各种方法,并强调了它们的局限性,特别是在分割大脑髓鞘部分方面的不足。它还提出了一种克服这些缺点的新方法。
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引用次数: 1
Left ventricle segmentation from cardiac cine MRI to detect cardiac abnormalities 心脏MRI左心室分割检测心脏异常
Pub Date : 2014-04-03 DOI: 10.1109/ICCSP.2014.6949856
R. Heldah Paul, J. Jeeva
Magnetic Resonance Imaging (MRI) has become one of the most promising technologies for the treatment of cardiac abnormalities. Nowadays, Image processing techniques are widely used in medical field to detect cardiac disorders. In this paper we present a simple and novel algorithm to automatically segment the Left Ventricle (LV) in short axis cardiac cine MRI. The frames of the cine MRI of a pathological and five normal patients are processed using enhancement, thresholding and morphological operations. The variation in the area of the left ventricle is calculated for the entire cardiac cycle for normal and diseased conditions. The pattern of variation in area for abnormal is significantly different from that of normal and hence could be used as a tool for detecting abnormal cardiac motion.
磁共振成像(MRI)已成为治疗心脏异常最有前途的技术之一。目前,图像处理技术在医学领域被广泛应用于心脏疾病的检测。本文提出了一种简单、新颖的短轴心脏MRI左心室自动分割算法。采用增强、阈值和形态学操作,对1例病理患者和5例正常患者的MRI图像帧进行处理。在左心室面积的变化是计算整个心脏周期的正常和病变的条件。异常区域的变化模式与正常区域明显不同,因此可以作为检测异常心脏运动的工具。
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引用次数: 2
An optimized design of prototype filter for cosine modulated transmultiplexer 余弦调制复用器原型滤波器的优化设计
Pub Date : 2014-04-03 DOI: 10.1109/ICCSP.2014.6949828
A. Vishwakarma, A. Kumar, G. K. Singh
An efficient M-channel cosine modulated transmultiplexer system can be simply designed in two steps: first, efficient design of prototype filter and second designing of synthesis/analysis filters using cosine modulation technique. In this paper, first prototype filter is designed using weighted constrained least square technique, then using an efficient optimization algorithm, sum of interference parameters such as inter-channel interference and inter-symbol interference of transmultiplexer system has been reduced. At last, M-channel uniform transmultiplexer system has been designed by using cosine modulation. With the help of design examples, dominance of the proposed method is illustrated.
一个高效的m通道余弦调制多路复用系统的设计可以简单地分为两个步骤:第一,原型滤波器的高效设计,第二,利用余弦调制技术设计合成/分析滤波器。本文首先利用加权约束最小二乘技术设计了原型滤波器,然后利用一种高效的优化算法,降低了复用系统的信道间干扰和码元间干扰等干扰参数之和。最后,利用余弦调制技术设计了m通道均匀复用系统。通过设计实例,说明了该方法的优越性。
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引用次数: 0
Intelligent system for vehicular accident detection and notification 智能系统的车辆事故检测和通知
Pub Date : 2014-04-03 DOI: 10.1109/ICCSP.2014.6950048
B. S. Anil, Kale Aniket Vilas, S. Jagtap
Road accidents are a human tragedy. They involve high human suffering and monetary costs in terms of untimely deaths, injuries and loss of potential income. There are so many new techniques such as Antilock Breaking System (ABS), Adaptive Cruise Control (ACC), Anti Collision System (ACS) to avoid accidents and in spite of all this, such large number of accidents takes place. Hence this paper presents a system which gives an idea about what can be done to provide medical help and other facilities after accident as soon as possible. Accident can be detected using flex sensor and accelerometer, while location of accident will be informed to desired persons such as nearest hospital, police and owner of vehicle through sms sent using GSM modem containing co-ordinates obtained from GPS along with time of accident and vehicle number. Camera located inside vehicle will transmit real time video to see current situation of passengers inside vehicle. Thus this paper emphasizes on post-accident system for detecting and informing about it. Simulation result on hyper terminal is also presented in this paper.
交通事故是人类的悲剧。在过早死亡、受伤和潜在收入损失方面,它们涉及巨大的人类痛苦和金钱代价。防抱死系统(ABS)、自适应巡航控制系统(ACC)、防撞系统(ACS)等新技术的出现避免了交通事故的发生,但仍有大量的交通事故发生。因此,本文提出了一个系统,该系统给出了如何在事故发生后尽快提供医疗帮助和其他设施的想法。使用伸缩传感器和加速度计可以检测到事故,而事故的位置将通过使用GSM调制解调器发送的包含从GPS获得的坐标以及事故时间和车辆号码的短信通知给所需的人员,例如最近的医院,警察和车辆所有者。位于车内的摄像头将实时传输视频,以了解车内乘客的现状。因此,本文着重研究了事故发生后的检测与预警系统。文中还给出了在超级终端上的仿真结果。
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引用次数: 33
期刊
2014 International Conference on Communication and Signal Processing
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