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2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications最新文献

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A new M-estimator based robust multiuser detection in flat fading synchronous non-Gaussian channels 基于m估计的平衰落同步非高斯信道鲁棒多用户检测
2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI: 10.1109/EMRTW.2005.195688
T. A. Kumar, K. Deergha Rao
{"title":"A new M-estimator based robust multiuser detection in flat fading synchronous non-Gaussian channels","authors":"T. A. Kumar, K. Deergha Rao","doi":"10.1109/EMRTW.2005.195688","DOIUrl":"https://doi.org/10.1109/EMRTW.2005.195688","url":null,"abstract":"In many realistic wireless channels the ambient noise is known through experimental measurements to be decidedly non-Gaussian, due largely to impulsive phenomenon. Frequently, code-division multiple-access (CDMA) transmissions are made over fading channels. This paper deals with the problem of multiuser detection in direct-sequence CDMA fading channels with impulsive noise. A new M-estimator-based structure for noncoherent demodulation of differentially phase-shift keyed (DPSK) signals transmitted simultaneously via a synchronous CDMA flat-fading channel and embedded in impulsive noise, is proposed and analyzed. Simulation results show that, in highly impulsive noise, the performance gain afforded by the proposed multiuser detector can be substantial when compared to the linear decorrelating detector for DPSK, with little attendant increase in computational complexity.","PeriodicalId":119938,"journal":{"name":"2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications","volume":"142 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124886697","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
adaptive linearization of a power amplifier based on compression of delta-sigma modulated signals 基于δ - σ调制信号压缩的功率放大器自适应线性化
2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI: 10.1109/EMRTW.2005.195679
D. Zrilic
{"title":"adaptive linearization of a power amplifier based on compression of delta-sigma modulated signals","authors":"D. Zrilic","doi":"10.1109/EMRTW.2005.195679","DOIUrl":"https://doi.org/10.1109/EMRTW.2005.195679","url":null,"abstract":"This paper describes a novel method of adaptive linearization of power amplifier based on mixed mode processing of band-pass delta-sigma pulse stream. Our simulation results have shown significant reduction in spreading of spectra of nonlinear amplifier when adaptive feedback is used.","PeriodicalId":119938,"journal":{"name":"2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications","volume":"229 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114151838","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
A tunable pre-distorter for linearization of solid state power amplifier in mobile wireless OFDM 一种用于移动无线OFDM固态功率放大器线性化的可调预失真器
2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI: 10.1109/EMRTW.2005.195686
Byung Moo Lee, R. de Figueiredo
{"title":"A tunable pre-distorter for linearization of solid state power amplifier in mobile wireless OFDM","authors":"Byung Moo Lee, R. de Figueiredo","doi":"10.1109/EMRTW.2005.195686","DOIUrl":"https://doi.org/10.1109/EMRTW.2005.195686","url":null,"abstract":"One of the major problems posed by orthogonal frequency division multiplexing (OFDM) is its high peak-to-average-power ratio (PAPR), which seriously limits the power efficiency of the solid state power amplifier (SSPA) because of the nonlinear distortion caused by high PAPR. In the present paper, we describe an analytical design approach that uses a sparse and yet accurate model for the pre-distorter (PD) based on the SSPA characteristics. Furthermore, the PD configuration is self-tuning, i.e., it can automatically re-adjust itself by tracking changes in the SSPA characteristics with very few (typically two) training symbols.","PeriodicalId":119938,"journal":{"name":"2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115640395","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: 13
Wireless sensor networks: a new communication paradigm 无线传感器网络:一种新的通信范式
2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI: 10.1109/EMRTW.2005.195671
M. Bayoumi
{"title":"Wireless sensor networks: a new communication paradigm","authors":"M. Bayoumi","doi":"10.1109/EMRTW.2005.195671","DOIUrl":"https://doi.org/10.1109/EMRTW.2005.195671","url":null,"abstract":"Summary form only given. Computers, communication, and sensing technologies are converging to change the way we live, interact, and conduct business. Wireless sensor networks reflect such convergence. These networks are based on collaborative efforts of a large number of sensor nodes. They should be low-cost, low-power, and multifunction. These nodes have the capabilities of sensing, data processing, and communicating. Sensor networks have wide range of applications, from monitoring sensors in industrial facilities to control and management of energy applications to military and security fields. Because of the special features of these networks, new network technologies are needed for cost effective, low power, and reliable communication. These network protocols and architectures should take into consideration the special features of sensor networks such as: the large number of nodes, their failure rate, limited power, etc. In this talk the impact of wireless sensor networks is addressed, several of the design and communication issues is discussed, and a case study of a current project of using such networks in drilling and management off-shore oil is given.","PeriodicalId":119938,"journal":{"name":"2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122854781","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
Analysis of the design trajectory characteristics for the minimal-time system design algorithm 最小时间系统设计算法的设计轨迹特性分析
2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI: 10.1109/EMRTW.2005.195684
A. Zemliak
{"title":"Analysis of the design trajectory characteristics for the minimal-time system design algorithm","authors":"A. Zemliak","doi":"10.1109/EMRTW.2005.195684","DOIUrl":"https://doi.org/10.1109/EMRTW.2005.195684","url":null,"abstract":"The problem of minimal-time system design algorithm construction was discussed. The different design trajectories have been analyzed within the limits of the new system design methodology. The special geometrical dividing surface was defined and analyzed on the basis of before discovered acceleration effect. Numerical results of both passive and active nonlinear circuit design prove the possibility of the optimal or quasi-optimal design trajectory realization.","PeriodicalId":119938,"journal":{"name":"2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124787700","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
Synthesis of wave analogue super narrow-band filters 波模拟超窄带滤波器的合成
2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI: 10.1109/EMRTW.2005.195675
B. A. Lapshin, V. A. Petrakov, A. Fedorov
{"title":"Synthesis of wave analogue super narrow-band filters","authors":"B. A. Lapshin, V. A. Petrakov, A. Fedorov","doi":"10.1109/EMRTW.2005.195675","DOIUrl":"https://doi.org/10.1109/EMRTW.2005.195675","url":null,"abstract":"The method of synthesis of wave super narrow-band filters of a chain type with arithmetic symmetric loss characteristics is considered. The example of calculation of optical super narrow-band filter with the Chebyshev characteristic is given.","PeriodicalId":119938,"journal":{"name":"2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128663638","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
System identification with adaptive algorithms 采用自适应算法的系统识别
2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI: 10.1109/EMRTW.2005.195681
E. Szopos, M. Topa, N. Toma
{"title":"System identification with adaptive algorithms","authors":"E. Szopos, M. Topa, N. Toma","doi":"10.1109/EMRTW.2005.195681","DOIUrl":"https://doi.org/10.1109/EMRTW.2005.195681","url":null,"abstract":"The paper presents the adaptive LMS algorithm used for system identification. The unknown system is modeled by a FIR filter. After the presentation of the theoretical approach, simulations in Labview and Matlab are provided showing the performance of the method.","PeriodicalId":119938,"journal":{"name":"2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122483719","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: 3
Fast RLS with parallel computations 快速RLS与并行计算
2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI: 10.1109/EMRTW.2005.195676
V. Djigan
{"title":"Fast RLS with parallel computations","authors":"V. Djigan","doi":"10.1109/EMRTW.2005.195676","DOIUrl":"https://doi.org/10.1109/EMRTW.2005.195676","url":null,"abstract":"The paper presents parallel forms of the sliding window fast RLS algorithms with the regularization of adaptive filter correlation matrix. The new algorithms are mathematically identical to the appropriate algorithms with sequential computations, but can be implemented by means of parallel processors. The algorithms are based on the using of the generalized matrix inversion lemma. They can be used for the processing of non-stationary signals.","PeriodicalId":119938,"journal":{"name":"2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123225687","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
Adaptive input-power processing for mitigation of PAPR in OFDM OFDM中抑制PAPR的自适应输入功率处理
2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI: 10.1109/EMRTW.2005.195669
R. de Figueiredo, Lin Fang
{"title":"Adaptive input-power processing for mitigation of PAPR in OFDM","authors":"R. de Figueiredo, Lin Fang","doi":"10.1109/EMRTW.2005.195669","DOIUrl":"https://doi.org/10.1109/EMRTW.2005.195669","url":null,"abstract":"The high peak-to-average-power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) greatly limits the high power amplifier (HPA) power efficiency. Different from other approaches to PAPR mitigation, the approach in this paper presents a simple new scheme which employs adaptive input power processing to reduce the instantaneous power fluctuation of OFDM signals. Specifically, at the transmitter side, the segments of the OFDM signal with high power are pushed down and the ones with low power are pulled up by adaptive adjustment of input power. As a consequence, the PAPR is greatly mitigated. These results are confirmed by computer simulations.","PeriodicalId":119938,"journal":{"name":"2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129563591","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: 3
Simulation of linear and non-linear effects in switched-capacitor delta-sigma modulators 开关电容δ - σ调制器中线性和非线性效应的仿真
2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications Pub Date : 2005-06-23 DOI: 10.1109/EMRTW.2005.195680
A. Korotkov, M. V. Telenkov
{"title":"Simulation of linear and non-linear effects in switched-capacitor delta-sigma modulators","authors":"A. Korotkov, M. V. Telenkov","doi":"10.1109/EMRTW.2005.195680","DOIUrl":"https://doi.org/10.1109/EMRTW.2005.195680","url":null,"abstract":"The paper presents a methodology and corresponding software tool for simulations of oversampled switched-capacitor delta-sigma modulator. It allows the analysis of non-ideal parameter influence. Among these parameters are parasitic capacitors, limited switch resistances, gain-bandwidth product of active devices. Special attention is passed to analysis of nonlinear properties of stray capacitances and active elements. Simulation of jitter effect is considered us well. The developed program Is based on nodal approach. Volterra series technique and numerical multi-dimensional inverse Laplace transform are used for the nonlinear analysis. Results are illustrated by examples. The program has been written in MATLAB.","PeriodicalId":119938,"journal":{"name":"2005 IEEE 7th CAS Symposium on Emerging Technologies: Circuits and Systems for 4G Mobile Wireless Communications","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124047454","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
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