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2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications最新文献

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Decision-oriented MSE-based narrow-band interference suppression for MB-OFDM UWB communications 基于决策的mse的MB-OFDM UWB通信窄带干扰抑制
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651329
Yuan-Wei Wu, Hsi-Pin Ma
{"title":"Decision-oriented MSE-based narrow-band interference suppression for MB-OFDM UWB communications","authors":"Yuan-Wei Wu, Hsi-Pin Ma","doi":"10.1109/ISSSTA.2010.5651329","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651329","url":null,"abstract":"In this paper, a blind method to detect and suppress narrow-band interference (NBI) for multi-band orthogonal frequency-division multiplexing (MB-OFDM) based ultrawideband (UWB) communications is proposed. The method utilizes mean-square-error (MSE) statistics in the frequency domain to detect subcarriers damaged by NBI. Approximating the MSE statistics by a decision-feedback (DF) scheme creates a blind solution without extra pilots or any other training sequences. After simplification, the computation overhead of the proposed DF method can be accomplished by only a multiplier and nine adders. Therefore, this novel method requires low computation complexity and is suitable for hardware implementation. The detection result is beneficial for band-group selection and interference detection and avoidance (DAA) mechanisms for MB-OFDM systems. Simulation results show that conventional spreading methods may fail to combat NBI as the signal-to-interference ratio (SIR) decreases. Rejecting interfered subcarriers according to the proposed method can improve system performance, reducing the bit error rate (BER) from around 10−2 to below 10−4.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"5 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116586340","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
UWB systems for body area networks 体域网络的超宽带系统
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1504/IJUWBCS.2011.044598
Marco Hernandez, R. Kohno
{"title":"UWB systems for body area networks","authors":"Marco Hernandez, R. Kohno","doi":"10.1504/IJUWBCS.2011.044598","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2011.044598","url":null,"abstract":"The paper describes the physical layer of UWB systems for body area networks currently in development by the IEEE standardization 802.15.6 Task Group. Impulse radio-based UWB systems with non-coherent and differential coherent modulations are envisioned as well as FM-UWB systems. Such systems are optimized for low power and reliability operation especially in medical applications.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123420283","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: 9
A Study on the code acquisition and tracking systems using pseudo-ternary M-sequences 伪三进制m序列码采集与跟踪系统的研究
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5648821
Ryo Enomoto, H. Habuchi
{"title":"A Study on the code acquisition and tracking systems using pseudo-ternary M-sequences","authors":"Ryo Enomoto, H. Habuchi","doi":"10.1109/ISSSTA.2010.5648821","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5648821","url":null,"abstract":"In this paper, a code acquisition and tracking system using pseudo-ternary maximum-length shift register sequence (pseudo-ternary M-sequence) is proposed. The pseudo-ternary M-sequence is based on the M-sequence and generated by very simple methods. In the code tracking part of the proposed system, a delay-locked loop (DLL) referring the pseudo-ternary M-sequence is used. The DLL using the pseudo-ternary M-sequence can improve a tracking error performance by comparison with the DLL using the M-sequence. In the code acquisition part, a rectified pseudo-ternary M-sequence and the {-1,+1}-valued M-sequence are used. Because of the rectification, the proposed system realizes an acquisition scheme that is independent of polarity of a received sequence. Moreover, since a cross-correlation function of the pseudo-ternary M-sequence and the {-1,+1}-valued M-sequence shows a pseudo-orthogonal relation, a probability of a false alarm of the proposed system can be smaller than the conventional sliding correlator using Manchester-coded M-sequences.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123365863","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
MISO time reversal and constrained least squares pre-equalizer ultra-wideband systems MISO时间反转和约束最小二乘预均衡器超宽带系统
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5650704
B. Angélico, P. Burt, P. Jeszensky, T. Abrão
{"title":"MISO time reversal and constrained least squares pre-equalizer ultra-wideband systems","authors":"B. Angélico, P. Burt, P. Jeszensky, T. Abrão","doi":"10.1109/ISSSTA.2010.5650704","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5650704","url":null,"abstract":"The paper compares the performance of a baseband multiple-input single-output (MISO) ultra-wideband system (UWB), incorporating two types of pre-distortion: time reversal (TR) and a constrained least squares (CLS) pre-equalizer. For the CLS, a simple cost function is proposed which can be easily solved with a gradient based algorithm. Results show that the CLS scheme provides a good inter-symbol interference (ISI) reduction, with a moderate computational complexity.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125959017","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
The Cramer-Rao Bound for channel estimation in block fading Amplify-and-Forward relaying networks 块衰落放大转发中继网络信道估计的Cramer-Rao界
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651393
Nico Aerts, I. Avram, M. Moeneclaey
{"title":"The Cramer-Rao Bound for channel estimation in block fading Amplify-and-Forward relaying networks","authors":"Nico Aerts, I. Avram, M. Moeneclaey","doi":"10.1109/ISSSTA.2010.5651393","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651393","url":null,"abstract":"In this paper, we express the Cramer-Rao Bound (CRB) for channel coefficient and noise variance estimation at the destination of an Amplify-and- Forward (AF) based cooperative system, in terms of the a posteriori expectation of the codewords. An algorithm based on factor graphs can be applied in order to calculate this expectation. As the computation of the CRB is rather intensive, the modified CRB (MCRB), which is a looser bound, is derived in closed form. It can be shown that the MCRB coincides with the CRB in the high signal-to-noise ratio (SNR) limit and to that end the CRB/MCRB ratio is simulated in case of uncoded and convolutional encoded transmission.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127878745","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
Low complexity multiuser detection based on reliable samples 基于可靠样本的低复杂度多用户检测
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651348
Celso Iwata Frison, C. de Almeida
{"title":"Low complexity multiuser detection based on reliable samples","authors":"Celso Iwata Frison, C. de Almeida","doi":"10.1109/ISSSTA.2010.5651348","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651348","url":null,"abstract":"A sub-optimum multiuser detector which compares the received samples to reliability thresholds, in order to classify them as reliable or non-reliable, is proposed for CDMA systems. Each one of these classified samples receives a different management in the detection process. This technique presents a good trade-off between performance and complexity in relation to the optimum multiuser detector. In fact, for some values of the reliability thresholds, the proposed detector reaches the optimum multiuser detector performance with a much smaller complexity. Theoretical equations and results of simulation for the complexity and bit error rate are presented. The proposed theoretical expressions are very tight when compared to the respective simulation results.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126561531","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 novel construction of zero correlation zone sequences based on Boolean functions 一种基于布尔函数的零相关带序列构造方法
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5654347
Yuqi Tang, Chao-Yu Chen, Chi-chao Chao
{"title":"A novel construction of zero correlation zone sequences based on Boolean functions","authors":"Yuqi Tang, Chao-Yu Chen, Chi-chao Chao","doi":"10.1109/ISSSTA.2010.5654347","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5654347","url":null,"abstract":"In this paper, a new direct construction of zero correlation zone (ZCZ) sequence sets based on the generalized Boolean functions is proposed. Different from quite a number of previous results in the literature, our method does not require other special sequences. The sequence length, the ZCZ length, the set size, and the constellation size are all very flexible. Optimal and almost optimal ZCZ sequence sets can be obtained.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131171599","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
WRAP: A weighted random value protocol for multiuser wireless body area network WRAP:一种用于多用户无线体域网络的加权随机值协议
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5649127
ChingYao Huang, MeiLing Liu, ShihHeng Cheng
{"title":"WRAP: A weighted random value protocol for multiuser wireless body area network","authors":"ChingYao Huang, MeiLing Liu, ShihHeng Cheng","doi":"10.1109/ISSSTA.2010.5649127","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5649127","url":null,"abstract":"In this paper, a weighted-random-value based resource allocation protocol, WRAP, for multiuser wireless body area network (WBAN) is proposed. WRAP will simultaneously allocate intra and inter WBAN resources by considering both the quality of service (QoS) control in a single WBAN and priority differences among WBANs. Simulation results show that WRAP algorithm can effectively allocate data slots to meet WBAN bandwidth requirements in various conditions.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132590591","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: 11
Reduced support vector machine detector for Chaos-based CDMA systems 基于混沌的CDMA系统的简化支持向量机检测器
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651334
J. Kao, S. Berber, V. Kecman
{"title":"Reduced support vector machine detector for Chaos-based CDMA systems","authors":"J. Kao, S. Berber, V. Kecman","doi":"10.1109/ISSSTA.2010.5651334","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651334","url":null,"abstract":"In this paper, we present the algorithm and the results of a modified support vector machine (SVM) detector on a Chaos-based code division multiple access (CDMA) system so that it has less computational complexity than the conventional correlator receiver. This is achieved through the recursive feature elimination (RFE) algorithm, which is commonly used for feature extraction in bioinformatics applications. The system was simulated under both AWGN and Rayleigh fading channels. Simulation results showed that the modified scheme has less complexity than the conventional correlator and provides a much better BER performance. The maximum performance loss is only 2 dB away from a standard SVM detector under AWGN and no significant difference was observed under the Rayleigh fading channel.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132156656","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
Impact of difference in WBAN channel models on UWB system performance WBAN信道模型的差异对UWB系统性能的影响
2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2010-12-03 DOI: 10.1109/ISSSTA.2010.5651033
Harri Viittala, M. Hamalainen, J. Iinatti
{"title":"Impact of difference in WBAN channel models on UWB system performance","authors":"Harri Viittala, M. Hamalainen, J. Iinatti","doi":"10.1109/ISSSTA.2010.5651033","DOIUrl":"https://doi.org/10.1109/ISSSTA.2010.5651033","url":null,"abstract":"In this paper, the performances of two singleband ultra wideband (UWB) systems, i.e., direct sequence UWB (DS-UWB) and UWB frequency modulation (UWB-FM) are studied in two different channel models to reveal an impact of a channel model on the system's performance. The applied channel models are the experimental wireless body area network (WBAN) channel model developed at the Centre for Wireless Communications (CWC), Finland, and the IEEE 802.15.6 channel model. The simulation results indicate that the choice of the WBAN channel model applied in the simulations has a major impact on the performance of UWB-FM, whereas it is not such a crucial in the case of DS-UWB.","PeriodicalId":433699,"journal":{"name":"2010 IEEE 11th International Symposium on Spread Spectrum Techniques and Applications","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122607664","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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