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2015 International Conference on Communications and Signal Processing (ICCSP)最新文献

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Opportunistic communication between licensed users and unlicensed users 授权用户和未授权用户之间的机会通信
Pub Date : 2015-11-12 DOI: 10.1109/ICCSP.2015.7322698
P. Anusha, Muragaveni Sudamani
Now-a-days the numbers of wireless users are increasing at a faster rate. So we can't allot spectrum to all the users. The unlicensed users along with licensed users try to occupy the spectrum at a time. Because of this interference will occur when the information is shared between both unlicensed and licensed in the same time period. We have to reduce interference when spectrum is occupied because there is a difficulty in maintaining the expected quality of service for unlicensed users. In this paper we use distributed dynamic spectrum protocol in which both licensed and unlicensed users oppurtunistically operate spectrum at a time. At first channel gain estimates are used to set feasible transmit powers for unlicensed users i.e., device-to-device users here to keep the interference they cause within the allowed interference temperature. Then network information is used when the packets are sent from source to destination. Using network information we can establish either single-hop route or multi-hop route when the data is transferred using route discovery packets. This network information in discovery packet will help reduce the failure rate in discovering the route and also will help increase the percentage savings in the number of discovery transmissions. We will also make analysis to obtain the maximum possible packet delivery rate during the time when information is transferred.
如今,无线用户的数量正以更快的速度增长。所以我们不能把频谱分配给所有的用户。未授权用户和授权用户试图同时占用频谱。由于在同一时间段内未授权和授权用户共享信息时将发生这种干扰。当频谱被占用时,我们必须减少干扰,因为难以为无牌用户维持预期的服务质素。在本文中,我们使用分布式动态频谱协议,其中授权和非授权用户可以同时操作频谱。首先,信道增益估计用于为未经许可的用户(即设备对设备用户)设置可行的发射功率,以使其引起的干扰保持在允许的干扰温度范围内。然后在数据包从源发送到目的时使用网络信息。在使用路由发现包进行数据传输时,利用网络信息可以建立单跳路由或多跳路由。发现包中的网络信息有助于降低路由发现的失败率,也有助于增加发现传输的百分比节省。我们还将进行分析,以获得信息传输时间内可能的最大数据包传输速率。
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引用次数: 0
Design of polyphase FIR filter using bypass feed direct multiplier 采用旁路馈电直接乘法器的多相FIR滤波器设计
Pub Date : 2015-11-12 DOI: 10.1109/ICCSP.2015.7322796
Rahul M. Deshmukh, R. Keote
Multirate filter are widely used in many DSP application. Many efficient architectures are design to reduce the complexity of DSP system. Adder, Multiplier are the main fundamental blocks of filter which contributes in reduction of area, power and delay parameter of filter. This paper presents polyphase FIR filter using bypass feed direct multiplier and polyphase FIR filter using shift and add multiplier. The proposed polyphase filter is design for filter of length nine. The proposed and conventional design are simulated using Xilinx ISE 13.1 tool. On comparison, proposed design is efficient in terms of area and delay than conventional design.
多速率滤波器广泛应用于许多DSP应用中。为了降低DSP系统的复杂性,设计了许多有效的体系结构。加法器、乘法器是滤波器的主要基本模块,它们有助于减小滤波器的面积、功耗和延迟参数。本文介绍了采用旁路馈电直接乘法器的多相FIR滤波器和采用移位加乘法器的多相FIR滤波器。所提出的多相滤波器是针对长度为9的滤波器设计的。采用Xilinx ISE 13.1工具对提出的和传统的设计进行了仿真。通过比较,本设计在面积和时延方面都比传统设计有效。
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引用次数: 11
Performance of Zero-Forcing MUTP assisted IDMA system for downlink communications 零强迫MUTP辅助IDMA系统的下行通信性能
Pub Date : 2015-04-02 DOI: 10.1109/ICCSP.2015.7322428
K. S. Vishvaksenan, V. Aswini
In this contribution, we consider the performance of multi-user transmitter pre-processing (MUTP) assisted interleaved division multiple access (IDMA) scheme for downlink (DL) communications. We realize MUTP using Zero Forcing (ZF)algorithm. In this paper, we consider turbo coded system to achieve high coding gain. We construct the turbo code using parallel concatenated convolutional encoder and certain bits are punctured periodically to achieve code rate ½. We construct the pre-processing matrix using channel state information of all the users. We evaluate the performance of such coded ZF-MUTP assisted IDMA system for realistic channel model based on SUI channel model specifications. From our simulations, we observe that the ZF-MUTP assisted multi-user IDMA system provides better performance in terms of bit error rate (BER) with low signal to noise ratio (SNR).
在这篇贡献中,我们考虑了多用户发射机预处理(MUTP)辅助下链路(DL)通信的交错多址(IDMA)方案的性能。我们使用零强制(Zero Forcing, ZF)算法实现MUTP。在本文中,我们考虑涡轮编码系统来实现高编码增益。我们使用并行级联卷积编码器构造turbo码,并定期穿刺某些位以达到码率1 / 2。我们利用所有用户的信道状态信息构造预处理矩阵。基于SUI信道模型规范,我们评估了这种编码ZF-MUTP辅助IDMA系统在真实信道模型下的性能。从我们的仿真中,我们观察到ZF-MUTP辅助的多用户IDMA系统在低信噪比(SNR)下提供了更好的误码率(BER)性能。
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引用次数: 0
Hybrid method based optimized design of digital IIR filter 基于混合方法的数字IIR滤波器优化设计
Pub Date : 2015-04-02 DOI: 10.1109/ICCSP.2015.7322776
N. Agrawal, A. Kumar, V. Bajaj
In this paper, a hybrid optimization for the design infinite impulse response (IIR) filter employing particle swarm optimization (PSO) and artificial bee colony (ABC) algorithm is presented. The design problem is formulated as a mean square error between desired response and ideal response. For the stability of filter, a lattice structure in design is utilized. A comparative study of performance of PSO and its different variants is also made which shows improved efficiency of hybrid method in the field of IIR filter design.
提出了一种基于粒子群算法和人工蜂群算法的无限脉冲响应滤波器的混合优化设计方法。设计问题被表述为期望响应和理想响应之间的均方误差。为了保证滤波器的稳定性,在设计中采用了点阵结构。对比研究了粒子群算法及其不同变体的性能,证明了混合算法在IIR滤波器设计中的有效性。
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引用次数: 10
Active noise control system for narrowband noise using FxLMS algorithm 窄带噪声主动控制系统采用FxLMS算法
Pub Date : 2015-04-02 DOI: 10.1109/ICCSP.2015.7322911
E. Priya, V. Saravanan, N. Santhiyakumari
An active noise control (ANC) is a method used to reduce noise effectively. The filtered-X least mean square (FxLMS) algorithm is considered to be the best choice for its reduced complexity and robustness, especially for controller in adaptive filter. In this paper FxLMS algorithm is applied for narrow band noise. Also the system uses variable learning parameter (variable step size) to improve the convergence speed and reduction in noise. The objective of using variable step FxLMS (VSFxLMS) algorithm is to reduce the noise level in source with novel convergence speed in addition to secondary impulse response. Simulations are carried out using MATLAB. The reduction of noise in a narrow band is preferred so that effective and efficient noise control will be achieved and a comparative result with fixed step FxLMS (FSFxLMS) is shown.
主动噪声控制(ANC)是一种有效降低噪声的方法。滤波- x最小均方(FxLMS)算法具有较好的鲁棒性和较低的复杂度,是自适应滤波控制器的最佳选择。本文将FxLMS算法应用于窄带噪声检测。系统采用可变学习参数(可变步长)来提高收敛速度和降低噪声。采用变步长FxLMS (VSFxLMS)算法的目的是在保证二次脉冲响应的同时,以新颖的收敛速度降低声源中的噪声水平。利用MATLAB进行了仿真。为了实现有效和高效的噪声控制,首选在窄频带内降低噪声,并给出了与固定步长FxLMS (FSFxLMS)的比较结果。
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引用次数: 4
Survey of quality score calculation for human visual perception of an image 人类视觉感知图像的质量分数计算综述
Pub Date : 2015-04-02 DOI: 10.1109/ICCSP.2015.7322795
Mangesh Patil, Abhipray Paturkar
The quality of measuring the image is a complicated and difficult process since humans opinion score is affected by physical and psychological factors. Several techniques are proposed for measuring the image quality but any of this techniques is considered to be ideal for measuring the image quality. Image quality assessment plays a significant role in the field of image processing. Image quality assessment (IQA) estimates the quality of an image by measuring the difference between the reference and distorted images. Distortion estimation in objective domain also plays a significant role during IQA. There are three categories of IQA methods: full-reference (FR), partial or reduced-reference (RR), and no-reference (NR). Reduced reference image quality assessment (RR IQA) gives a realistic solution for automatic image quality estimation in different kinds of applications where only partial information of the original or reference image is available. The idea of RR IQA's to use less information about the image and obtain higher evaluation precision.
由于人的意见评分受生理和心理因素的影响,对图像质量的测量是一个复杂而困难的过程。人们提出了几种测量图像质量的技术,但其中任何一种技术都被认为是测量图像质量的理想技术。图像质量评价在图像处理领域中占有重要地位。图像质量评估(IQA)通过测量参考图像和失真图像之间的差异来估计图像的质量。在IQA中,目标域的失真估计也起着重要的作用。IQA方法有三类:全参考(FR)、部分或简化参考(RR)和无参考(NR)。简化参考图像质量评估(RR - IQA)为仅提供部分原始图像或参考图像信息的各种应用中的自动图像质量估计提供了一种现实的解决方案。RR IQA的思想是利用较少的图像信息,获得更高的评价精度。
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引用次数: 1
Text-constrained speaker verification using fuzzy C means vector quantization 文本约束的说话人验证使用模糊C意味着矢量量化
Pub Date : 2015-04-02 DOI: 10.1109/ICCSP.2015.7322767
Debnath Saswati, Soni Badal, D. Pradip
The most successful approach to speech and speaker recognition is to treat the speech signal as a stochastic pattern and to use a statistical pattern recognition technique for matching utterances. This paper attempts to study the performance of Text dependent speaker verification system using Delta-Delta Mel Frequency Cepstral Coefficients (MFCC-Δ-Δ) feature vector and Fuzzy C means (FCM) speaker modelling technique. Speaker-specific information which is mainly represented by spectral features, are used in respective models which serves as an important parameter for determining the claim of the speaker. The experimental results performed on microphonic database suggest that accuracy significantly depends on the value of learning parameter of the objective function of FCM. Our work focuses on total success rate or accuracy and the effect of learning parameter of FCM on improving the accuracy.
语音和说话人识别最成功的方法是将语音信号视为随机模式,并使用统计模式识别技术来匹配话语。本文试图利用Delta-Delta Mel频率倒谱系数(MFCC-Δ-Δ)特征向量和模糊C均值(FCM)说话人建模技术研究文本依赖的说话人验证系统的性能。在各自的模型中使用主要由频谱特征表示的说话人特定信息,作为确定说话人权利要求的重要参数。在麦克风数据库上进行的实验结果表明,FCM目标函数的学习参数的取值对准确率有很大的影响。我们的工作重点是研究FCM的总成功率或准确率以及学习参数对提高准确率的影响。
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引用次数: 0
Estimation of volume and maturity of sweet lime fruit using image processing algorithm 利用图像处理算法估计甜酸橙果实的体积和成熟度
Pub Date : 2015-04-02 DOI: 10.1109/ICCSP.2015.7322703
P. Gokul, Shoraya Raj, Poornapushpakala Suriyamoorthi
The assessment of fruit quality is important for the cultivator and the consumer. The paper describes the image processing technique to estimate the volume and maturity of sweet lime. Spherical shape fruit is only considered for this analysis. The image is captured using a high resolution digital camera and cell phone. An algorithm is developed in MATLAB for finding the volume and maturity of the sweet lime. Volume of the fruit is computed by estimating the radius of the image. Maturity is determined with the RGB color coding based on RG ratio. The results are validated experimentally by measurement using Vernier Calipers.
水果品质评价对栽培者和消费者都具有重要意义。本文介绍了甜石灰体积和成熟度的图像处理技术。这种分析只考虑球形水果。图像是用高分辨率数码相机和手机拍摄的。在MATLAB中开发了一种求得甜石灰体积和成熟度的算法。通过估计图像的半径来计算水果的体积。成熟度由基于RG比例的RGB颜色编码确定。用游标卡尺进行了实验验证。
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引用次数: 20
The new approach: I-Genetic algorithm for classification of craters 新方法:i -遗传算法分类陨石坑
Pub Date : 2015-04-02 DOI: 10.1109/ICCSP.2015.7322881
R. Krishnan, A. Dharani
Generally object detection using genetic algorithm in images will consider all pixels of the images for cross over procedure, it is time consuming and expensive in nature. Here the I-Genetic algorithm considers the intensity values of the object interest for classification, so the considerations of all pixels are eliminated which improves execution time as well as object detection. The I-Genetic algorithm considers the intensity values of the object interest for cross over operation.
一般在图像中使用遗传算法进行目标检测时,需要考虑图像的所有像素点进行交叉处理,耗时长,成本高。在这里,i -遗传算法考虑目标兴趣的强度值进行分类,因此消除了所有像素的考虑,从而提高了执行时间和目标检测。遗传算法考虑目标兴趣的强度值进行交叉操作。
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引用次数: 0
LabVIEW based High Precision Temperature Logger for the project PARAS 基于LabVIEW的高精度温度记录仪项目PARAS
Pub Date : 2015-04-02 DOI: 10.1109/ICCSP.2015.7322832
Nirmalsinh A. Parmar, Jitendra Adwani, Vaibhav Surana, F. M. Pathan, Hiren K. Mewada
The “High Precision Temperature Logger” is designed for the project PARAS (PRL Advance Radial velocity Abu sky Search) to achieve a maximum temperature stability (like 0.01°C rms) throughout the period of observation of thermally insulated chamber where PARAS spectrograph is installed. The scientific aspect of the temperature controlled environment is to bring down the error in radial velocity measurement to 1m/s. Radial velocity (RV) technique is used to determine various orbital parameters in exo-planet search. It has been found that temperature variation of 1°C at the spectrograph environment can increase the error in radial velocity measurement by few thousands of m/s. Mechanical flexures (in the scale of micrometers) in the optical components can increase the error by a significant percentage due to temperature and pressure variations. So the temperature stability is very important for the PARAS project. So high precision temperature logger with a high stability is designed for PARAS project with the help of LabVIEW.
“高精度温度记录仪”是为PARAS (PRL Advance Radial velocity Abu sky Search)项目设计的,用于在安装PARAS光谱仪的隔热室的整个观测期间实现最大温度稳定性(如0.01°C rms)。温度控制环境的科学方面是将径向速度测量误差降低到1m/s。在系外行星搜索中,视向速度(RV)技术用于确定各种轨道参数。研究发现,在摄谱仪环境下,温度每变化1℃,径向速度测量误差就会增加几千m/s。由于温度和压力的变化,光学元件中的机械弯曲(以微米为尺度)会增加误差的显着百分比。因此,温度稳定性对PARAS项目来说是非常重要的。为此,利用LabVIEW软件为PARAS项目设计了高精度、高稳定性的温度记录仪。
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引用次数: 1
期刊
2015 International Conference on Communications and Signal Processing (ICCSP)
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