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2011 International Conference on Communications and Signal Processing最新文献

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Performance of combined low complexity QRD-M and DFE detection in MIMO-OFDM systems MIMO-OFDM系统中低复杂度QRD-M和DFE联合检测的性能
2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739321
P. Haris, E. Gopinathan, C. K. Ali
{"title":"Performance of combined low complexity QRD-M and DFE detection in MIMO-OFDM systems","authors":"P. Haris, E. Gopinathan, C. K. Ali","doi":"10.1109/ICCSP.2011.5739321","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739321","url":null,"abstract":"Multiple-input multiple-output (MIMO) technology applied with orthogonal frequency division multiplexing (OFDM) is considered as the ultimate solution to improve channel capacity without any additional spectral resources. At the receiver side, the challenge resides in designing low complexity detection algorithms capable of separating independent streams sent simultaneously from different antennas. In this paper, we propose a novel combined low complexity QRD-M (LQRD-M) and decision feedback equalization (DFE) MIMO detector that combines the feature of QRD-M detector and DFE detector. The original QRDM algorithm decomposes the MIMO channel matrix into upper triangular matrix and applies a limited tree search. To accomplish near-MLD(Maximum Likelihood Detection) performance for QRD-M algorithm, number of search points at each layer must be the modulation size. In the proposed scheme, each of survival branches are extended only to the corresponding QR decomposition (QRD)-based detection symbol in the next layer and its neighboring symbols in the constellation. In our detection technique with L transmit antennas, after LQRD-M detection is executed for first T detection steps, DFE detection is executed for last M - T detection steps. This approach is simple and has low complexity, because the computations for LQRD-M is limited by the newly adopted parameter T. From simulation results, the complexity of the proposed technique with 8 × 8 and T = 2 is reduced by 36% compared with that of QRDM-DFE algorithm at the expense of about 0.8dB in degradation of BER performance at BER = 10−4.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117006364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Spectrum efficiency for Rayleigh fading channels with Selection combining in the prsescence Co-channel Interference 存在共信道干扰时选择组合瑞利衰落信道的频谱效率
2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739307
S. Thai Subha, V. Bhaskar
{"title":"Spectrum efficiency for Rayleigh fading channels with Selection combining in the prsescence Co-channel Interference","authors":"S. Thai Subha, V. Bhaskar","doi":"10.1109/ICCSP.2011.5739307","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739307","url":null,"abstract":"In this paper, closed form expressions for capacities per unit bandwidth for Selection Combining (SC), when subjected to Co-channel Interference (CCI), are derived for Optimal power and rate adaptation, Optimal rate adaptation with constant transmit power, Channel inversion with fixed rate, Truncated channel inversion with fixed rate policies. Optimal power and rate adaptation policy provides the largest spectrum efficiency and Channel inversion with fixed rate policy provides the largest spectrum efficiency penalty over other adaptation policies for the diversity scheme discussed. SC diversity with Optimal power and rate adaptation policy yields highest spectrum efficiency when subjected to CCI.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115391851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Enhancing communication system efficiencies by wavelet implementation 利用小波变换提高通信系统效率
2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739295
Job Chunkath, B. Shankaranda
{"title":"Enhancing communication system efficiencies by wavelet implementation","authors":"Job Chunkath, B. Shankaranda","doi":"10.1109/ICCSP.2011.5739295","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739295","url":null,"abstract":"This paper highlights the improvements that can be realized in various performance parameters in a digital communication system using wavelets. Parameters like spectral efficiency, bandwidth utilization and bit error rate are found to improve with the help of wavelets. Daubechies system of wavelets is used as a case study.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117101836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Denoising and QRS detection of ECG signals using Empirical Mode Decomposition 基于经验模态分解的心电信号去噪与QRS检测
2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739355
B. NarsimhaJ, Suresh, Punnamchandar, Sanjeeva Redd
{"title":"Denoising and QRS detection of ECG signals using Empirical Mode Decomposition","authors":"B. NarsimhaJ, Suresh, Punnamchandar, Sanjeeva Redd","doi":"10.1109/ICCSP.2011.5739355","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739355","url":null,"abstract":"The key feature of Empirical Mode Decomposition (EMD) is to decompose a signal into so-called intrinsic mode functions (IMFs). Furthermore, the Hilbert spectral analysis of IMFs provides frequency information evolving with time and quantifies the amount of variation due to oscillations at different time scales and locations. In general most of the Bio-medical signals such as electrocardiogram (ECG), electroencephalogram (EEG) and electroocculogram (EOG) are non stationary signals, suffers from different interferences like power line interference and with other biomedical signals. Analysis of these signals is to extraction of useful information from the data and here it is carried by a new non-liner & non stationary data analysis method i.e., EMD. The concept of decomposing the signal into different IMF's will analyze the signal better than the other methods. In this paper, the well established method is utilized for denoising and detection of QRS complex waves from ECG signals.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121646670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Multiplexed Compressed Sensing for general frequency sparse signals 一般频率稀疏信号的多路压缩感知
2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739351
J. Satyanarayana, A. G. Ramakrishnan
{"title":"Multiplexed Compressed Sensing for general frequency sparse signals","authors":"J. Satyanarayana, A. G. Ramakrishnan","doi":"10.1109/ICCSP.2011.5739351","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739351","url":null,"abstract":"Compressed Sensing algorithms have provided feasible and reasonably accurate solutions to the problem of reconstructing signals of which only sub-Nyquist number of samples have been acquired. A framework called MOSAICS for acquiring multiple analog channels using limited number of A/D converters by exploiting CS based undersampling has been proposed in our previous work. In this paper we introduce an improvised reconstruction algorithm into the MOSAICS scheme, which overcomes a limitation in MOSAICS, thereby being able to handle a wider class of signals.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132451823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Improving performance for optical TDMA LANs/MANs with traffic control 提高具有流量控制的光TDMA局域网/城域网的性能
2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739393
R. Chiou
{"title":"Improving performance for optical TDMA LANs/MANs with traffic control","authors":"R. Chiou","doi":"10.1109/ICCSP.2011.5739393","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739393","url":null,"abstract":"In order to urge an optical TDMA network to be recommended as a LAN/MAN protocol, traffic-control approaches capable of improving performance on optical TDMA networks must be developed. This paper explores how to apply the unused bandwidth to enhance the performance of a middle-load TDMA network.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115168530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Miniaturized slot loaded proximity-coupled microstrip antenna for WLAN 用于WLAN的小型槽加载邻近耦合微带天线
2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739400
M. Thomas, J. S. Roy, B. Gupta
{"title":"Miniaturized slot loaded proximity-coupled microstrip antenna for WLAN","authors":"M. Thomas, J. S. Roy, B. Gupta","doi":"10.1109/ICCSP.2011.5739400","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739400","url":null,"abstract":"The design of a miniaturized proximity-coupled microstrip antenna (PCMA) is presented here. The antenna has very small size, wide bandwidth and moderate gain and may be used as small, compact antenna for 5GHz band wireless local area network (WLAN). Simulated results using IE3D software are verified by measurement.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116204507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Parallelizing connectivity-based image processing operators in a multi-core environment 在多核环境下并行化基于连通性的图像处理算子
2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739306
B. Ravi Kiran, K. Anoop, Y. Senthil Kumar
{"title":"Parallelizing connectivity-based image processing operators in a multi-core environment","authors":"B. Ravi Kiran, K. Anoop, Y. Senthil Kumar","doi":"10.1109/ICCSP.2011.5739306","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739306","url":null,"abstract":"With increasing computational requirements for state-of-art computer vision and graphics algorithms, multi-core processor implementations have picked up momentum. Adapting single core image processing algorithms for multi-core environment is difficult. Different platforms require a hand tailored approach to optimally fit the algorithm into a given multi-core architecture. An automatic compiler which could split and compile the code for any platform is desirable. Such a compiler doesn't exist and this kind of automation is tough to achieve. To aid existing compilers, we propose a simple software architecture framework for multi-core systems that aims to provide a uniform, scalable, and portable solution, solving specifically for connectivity based image processing operators.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116541205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Semisupervised support vector machine classification for hyperspectral imagery 高光谱图像的半监督支持向量机分类
2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739328
F. Mianji, Ye Zhang
{"title":"Semisupervised support vector machine classification for hyperspectral imagery","authors":"F. Mianji, Ye Zhang","doi":"10.1109/ICCSP.2011.5739328","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739328","url":null,"abstract":"Variety of techniques with the capability of being applied on original data spaces has been developed for hyperspectral (HS) classification. Among them, support vector machine (SVM) presents a high classification accuracy, however, its performance for too small ratios of number of available training samples to number of features is relatively low due to the Hughes effect. This paper proposes a new semisupervised approach through combining appropriate discriminant data transforms such as principal component analysis with SVM to tackle the above mentioned drawback. The experiments on real HS data validate the superiority of the proposed combined approach over the traditional pure SVM technique.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122733510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Quality of Service assured & faired MAC protocol for Mobile Adhoc Network 一种服务质量保证和公平的移动自组网MAC协议
2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739349
D. Seth, S. Patnaik, S. Pal
{"title":"A Quality of Service assured & faired MAC protocol for Mobile Adhoc Network","authors":"D. Seth, S. Patnaik, S. Pal","doi":"10.1109/ICCSP.2011.5739349","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739349","url":null,"abstract":"Mobile Adhoc Network (MANET) is a collection of mobile nodes with dynamic topology. Such networks are of interest because they do not require any prior investment in fixed infrastructure. Instead, the network nodes agree to relay each other's packets and hence act as routers and automatically form their own cooperative infrastructure. The primary responsibility of a medium access control (MAC) protocol in Adhoc Network is the distributed arbitration for the shared channel for transmission of packets. The performance of Adhoc Network depends upon the sincerity of the MAC protocol. The MAC protocol of this type of network should be distributed, faired & free from hidden and exposed terminal problem. It should also support real-time traffic, transmission power control & be compatible with directional antennas. Researchers have proposed many MAC protocol for MANET, but none of them are simultaneously distributed, faired and support Quality of Service besides being distributed. In this paper a new MAC protocol has been proposed which supports quality of service and exhibit fairness and workable in a multihop environment.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125776449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
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