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Combination of LMMSE equalization and multi-path interference cancellation in WCDMA receivers WCDMA接收机中LMMSE均衡与多径干扰消除的结合
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411660
Zhan Gao, Qi-hui Wu, Jinlong Wang
{"title":"Combination of LMMSE equalization and multi-path interference cancellation in WCDMA receivers","authors":"Zhan Gao, Qi-hui Wu, Jinlong Wang","doi":"10.1109/ICMMT.2004.1411660","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411660","url":null,"abstract":"High-speed packet transmission is an important characteristic in the 3rd generation mobile communication system. In order to enhance the performance of the high-speed packet transmission in low spreading factor, a new WCDMA receiver of chip equalizer (LMMSE-MPIC) is presented in this paper, which combines the linear chip equalizer with nonlinear multi-path interference cancellation together. The algorithm (PC-LMMSE) is proposed based on pilot cancellation. Theoretic analysis and computer simulations show that LMMSE-MPIC is superior to conventional Rake and LMMSE equalizer and effectively improves the performance of the WCDMA system in low spreading factor.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125662031","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
The analysis of cylindrical dipole array for base stations 基站用圆柱偶极子阵分析
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411507
Jun Gao, Xiangyu Cao
{"title":"The analysis of cylindrical dipole array for base stations","authors":"Jun Gao, Xiangyu Cao","doi":"10.1109/ICMMT.2004.1411507","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411507","url":null,"abstract":"A linear dipole array mounted on a finite solid conducting cylinder has potential application in mobile communications. In this paper, the radiation characteristic of this type of antenna array is analyzed using the finite-difference time-domain (FDTD) method. The key features of the FDTD implementation are discussed, with particular emphasis placed upon modeling of the source region and comparison of the convergence character of difference antenna feed models. The technique is used to predict the patterns of the cylindrical dipole array. The FDTD results agree well with the computation results from the method of moments (MOM).","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126921955","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
Design of feedforward linear power amplifier 前馈线性功率放大器的设计
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411581
Li Liang, Chu Qing-xin, Zeng Qing-feng
{"title":"Design of feedforward linear power amplifier","authors":"Li Liang, Chu Qing-xin, Zeng Qing-feng","doi":"10.1109/ICMMT.2004.1411581","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411581","url":null,"abstract":"This paper describes a control way of adaptive + lookup table for feed forward power amplifier, which can be used in the system of cdma 2000. Steepest descent algorithm is used for the control of the first loop, in the second loop we use the method of look up table, which is relevant with temperature. The amplifier's output is 45dBm, its IMD3 are less than -62 dBc. Test it with the signal of cdma 2000, we can see its ACPR is better than -54dB@750kHz, -71dB@1.98MHz.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115332239","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
Strategy research of optimizing effective radio coverage 优化无线电有效覆盖的策略研究
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411488
Xu Li, Zhong Zhangdui, Zhu Gang
{"title":"Strategy research of optimizing effective radio coverage","authors":"Xu Li, Zhong Zhangdui, Zhu Gang","doi":"10.1109/ICMMT.2004.1411488","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411488","url":null,"abstract":"The rapid increase of mobile communication network requires a more deliberate network planning, in which determining the effective coverage is one of the most important problems in network planning and optimization. Aiming at the problems in determining user-oriented effective coverage, propose to optimize some key parameters to improve the coverage equality, and carry on the corresponding simulation.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116408039","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
The analysis for multimode of electrical fields in reverberating chamber 混响室内电场多模态分析
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411682
Shafei Dingjinjin
{"title":"The analysis for multimode of electrical fields in reverberating chamber","authors":"Shafei Dingjinjin","doi":"10.1109/ICMMT.2004.1411682","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411682","url":null,"abstract":"The EMC test in reverberation chamber requires working in over mode state. This paper proves that we could get uniform electric fields in less mode state than traditional means, or with new method, such as symmetrical emission state, under certain conditions. The simulation results testify the mathematical deduction. It provides a possible way to lower the LUF (the lowest useable frequency) in chamber analysis.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122652677","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
Study of klystron cavity using MAFIA 用MAFIA研究速调管腔体
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411580
Liang Youhuan, LI Fujiang, Liu Zepu
{"title":"Study of klystron cavity using MAFIA","authors":"Liang Youhuan, LI Fujiang, Liu Zepu","doi":"10.1109/ICMMT.2004.1411580","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411580","url":null,"abstract":"An efficient method of determining the frequency and the characteristic impedance of the reentrant cavity for klystrons using MAFIA is presented in this paper. Two kinds of cavities are calculated. One is cylindrical cavity and the other is rectangular cavity. The results from MAFIA are compared with those from equivalent circuit model and those from cold test measurements. The error is within 10%.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116998480","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
High-performance edge-suspended spiral inductors and CPWs on CMOS-grade silicon substrates cmos级硅衬底上的高性能边缘悬浮螺旋电感器和cpw
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411597
Jinwen Zhang, W. Hon, L. Leung, K.J. Chen
{"title":"High-performance edge-suspended spiral inductors and CPWs on CMOS-grade silicon substrates","authors":"Jinwen Zhang, W. Hon, L. Leung, K.J. Chen","doi":"10.1109/ICMMT.2004.1411597","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411597","url":null,"abstract":"This paper reports high performance edge-suspended passive components realized by CMOS-compatible micromachining. The operation principle is described in detail. Edge-suspended inductors (ESIs) and CPWs (ESCPWs) are fabricated using a combination of deep dry etching and anisotropic wet etching techniques. For a three-turn 4.5-nH inductor, a 70% increase (from 6.8 to 11.7) in maximum Q-factor and a 57% increase (from 9.1 GHz to 14.3 GHz) in self-resonance frequency are obtained with a 11 /spl mu/m suspended edge in 25 /spl mu/m wide lines. A 50 /spl Omega/ CPW exhibits a reduction in insertion loss, from 2.4dB/mm to 0.4dB/mm at 39 GHz.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128354045","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
Analysis of fluorinated polymide waveguide directional couplers 氟化聚酰胺波导定向耦合器的分析
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411536
A. Abou El-fadl, A. Dabroom
{"title":"Analysis of fluorinated polymide waveguide directional couplers","authors":"A. Abou El-fadl, A. Dabroom","doi":"10.1109/ICMMT.2004.1411536","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411536","url":null,"abstract":"Analysis of optical properties of fluorinated polyimide waveguide directional couplers is presented. An algorithm based on the transverse operator method is developed. The longitudinal section electric modes and longitudinal section magnetic modes of a corresponding dielectric stratified waveguide have been taken as the basis eigenfunctions. This allows a more rapid convergence in terms of modes. The number of eigenmodes used in this analysis does not depend on the multidielectric structure. The dispersion characteristics of this type of coupler have been calculated by using an equivalent multidielectric waveguide. The coupling length, coupling ratio and the polarization as functions of the coupler parameters are evaluated. The obtained results are compared with the published theoretical and practical data. The comparison shows that the used method has an excellent accuracy.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129918827","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
Application of STFT ridges and RT to moving targets detection in SAR STFT脊和RT在SAR运动目标检测中的应用
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411617
Qu Chang-wen, He You, S. Feng, Guan Xin
{"title":"Application of STFT ridges and RT to moving targets detection in SAR","authors":"Qu Chang-wen, He You, S. Feng, Guan Xin","doi":"10.1109/ICMMT.2004.1411617","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411617","url":null,"abstract":"Synthetic aperture radar (SAR) is an active, all-weather capable system to provide the capability to map the ground with high resolution and is used in both civilian and military applications. Moving targets with respect to the stationary background cause smeared and ill-positioned images. Detection and imaging of moving targets in SAR signals are necessary. We propose the method that combined the ridges of the short-time Fourier transform (STFT) and Radon transform (RT) to detect moving targets. Processing steps of this method and simulated results are given in detail. Simulation results show this method can detect moving targets and estimate its parameters in noise case effectively.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"354 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114081663","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
Approximate formula of the loaded quality factor of doubly reentrant cylindrical cavity coupling with coaxial line 双可入圆柱腔同轴联轴器载荷质量因子的近似公式
ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004. Pub Date : 2004-08-18 DOI: 10.1109/ICMMT.2004.1411574
L. Fumin, Ding Yaogen
{"title":"Approximate formula of the loaded quality factor of doubly reentrant cylindrical cavity coupling with coaxial line","authors":"L. Fumin, Ding Yaogen","doi":"10.1109/ICMMT.2004.1411574","DOIUrl":"https://doi.org/10.1109/ICMMT.2004.1411574","url":null,"abstract":"The principle of coupling of doubly re-entrant cylindrical cavity with coaxial line is studied and an approximate formula for estimating the loaded quality factor is obtained. The estimated result of a practical example is compared with the simulation calculation result of ISFEL 3D and proved to be reasonable.","PeriodicalId":393410,"journal":{"name":"ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004.","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114715389","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
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