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2008 18th International Conference Radioelektronika最新文献

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DS-CDMA signal blind MMSE detector adaptation DS-CDMA信号盲MMSE检测器自适应
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542699
J. Šimša
{"title":"DS-CDMA signal blind MMSE detector adaptation","authors":"J. Šimša","doi":"10.1109/RADIOELEK.2008.4542699","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542699","url":null,"abstract":"The contribution is focused on multiuser detection of code-division multiplexed signals - direct- sequence CDMA. A very efficient detection of an individual signal within synchronous CDMA mitigating multiuser interference as well as additive noise is MMSE multiuser detection. Its adaptive version minimizes the prior information necessary for an optimized detector design. In the contribution the optimization of parameters of detectors based on steepest descent of target MMSE penalty function is summarized.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129981208","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
Self-cascode current controlled CCII based-tunable band pass filter 基于自级联码电流控制的CCII可调带通滤波器
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542706
I. Eldbib, V. Musil
{"title":"Self-cascode current controlled CCII based-tunable band pass filter","authors":"I. Eldbib, V. Musil","doi":"10.1109/RADIOELEK.2008.4542706","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542706","url":null,"abstract":"In this paper we present new construction of CMOS current conveyor based self cascode current mirrors used in tunable band pass filter. Thus the first step in our design was to improve the CCII performance characteristic. The low voltage self cascode technique in CMOS technology was first studied. A tunable current- mode band pass filter using active elements unity gain current conveyor based self cascode current mirror is presented. The Q-factor and the central frequency can be electronically controlled by a DC bias current. To verify this, a Pspice simulations were carried out using 0.7 um technology CMOS process from AMIS.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124453928","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: 23
Signal processing for through wall moving target tracking by M-sequence UWB radar m序列超宽带雷达跟踪穿墙运动目标的信号处理
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542694
J. Rovnáková, M. Švecová, D. Kocur, Trung-Thanh Nguyen, Jürgen Sachs
{"title":"Signal processing for through wall moving target tracking by M-sequence UWB radar","authors":"J. Rovnáková, M. Švecová, D. Kocur, Trung-Thanh Nguyen, Jürgen Sachs","doi":"10.1109/RADIOELEK.2008.4542694","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542694","url":null,"abstract":"In this paper, through wall moving target tracking by UWB radar is described as a complex process with all required phases of radar signal processing. For particular phases of that process, i.e. for raw radar data preprocessing, background subtraction, detection, trace estimation, localization and tracking itself, the phase significance and its corresponding representative methods are outlined. The complete process is illustrated by the results of processing of real data acquired by M-sequence UWB radar.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116742053","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: 45
High sensitive SRD data transceiver 高灵敏度SRD数据收发器
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542714
P. Vyskočil, J. Sebesta
{"title":"High sensitive SRD data transceiver","authors":"P. Vyskočil, J. Sebesta","doi":"10.1109/RADIOELEK.2008.4542714","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542714","url":null,"abstract":"This paper is focused on a fully digitally controlled data transceiver for SRD (short range devices) band 868 MHz which is based on single-chip transceiver CC1020. It can be applied in a communication system for remote control of measuring instruments, in signalling or alarm systems, and other wireless data transmissions. Presented data transceiver is conceived as a multi-purpose module driven by standard I2 C bus. The FSK modulation format is preferred to achieve a high sensitivity of receiver for required BER. Eight communication channels with 25 kHz spacing is configured as a default setting. The maximum transmitter output power is limited to 5 dBm, but separated RX and TX sections allow an insertion of high power amplifier in compliance with standard EN 300220. Circuit design, firmware architecture, and measured resulting parameters of this data transceiver are presented in posed paper.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"39 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131923665","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
An adaptive filter based on multigrid linear equation solvers 基于多网格线性方程解算器的自适应滤波
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542681
J. H. Husøy
{"title":"An adaptive filter based on multigrid linear equation solvers","authors":"J. H. Husøy","doi":"10.1109/RADIOELEK.2008.4542681","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542681","url":null,"abstract":"A recent and novel approach to the development of adaptive filtering algorithms is based on the theory of stationary iterative linear equation solvers: A classical Richardson iteration, possibly preconditioned, is applied to the Wiener-Hopf equation. Substituting estimates for various statistical quantities in the resulting recursion, a large number of classical and modern adaptive filters are developed with ease within a unified framework. Taking further inspiration from the field of numerical linear algebra, in this paper we make use of the multigrid paradigm, mostly used in the numerical solution of partial differential equations and their corresponding discretized linear equation sets, to devise a simple, yet robust adaptive filter with better performance than the NLMS algorithm.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132143626","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
MEMS technology in head tilt monitoring after vitreoretinal surgery MEMS技术在玻璃体视网膜手术后头部倾斜监测中的应用
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542695
J. Dlouhý, M. Čížek, I. Vícha, J. Rozman
{"title":"MEMS technology in head tilt monitoring after vitreoretinal surgery","authors":"J. Dlouhý, M. Čížek, I. Vícha, J. Rozman","doi":"10.1109/RADIOELEK.2008.4542695","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542695","url":null,"abstract":"Presented paper is focused on a new developing device intended for monitoring of patient's head position during the post-operative period after vitreoretinal surgery. Keeping the head in an optimal position after this operation is crucial for optimal results of the recovery process. Head tilt monitoring is a complicated task during the normal life. Described device is based on a modern micro-electro-mechanical systems (MEMS) acceleration sensor. MEMS sensors are used for sensing gravitational acceleration. A microcontroller is used for data processing, logging and controlling user interface.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129690233","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
Solution of voltage/current waves and their sensitivities in MTL structures by using state-variable method 用状态变量法求解MTL结构中的电压/电流波及其灵敏度
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542729
L. Brancík
{"title":"Solution of voltage/current waves and their sensitivities in MTL structures by using state-variable method","authors":"L. Brancík","doi":"10.1109/RADIOELEK.2008.4542729","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542729","url":null,"abstract":"The paper deals with a method for the solution of voltage/current waves propagating in multiconductor transmission line (MTL) structures and their sensitivities. The technique is based on a lumped-parameter model of the MTL while its solution is formulated via the state- variable method in the s-domain. The required t-domain solution is got by means of numerical inversion of Laplace transforms (NILT) method. All the obtained results have been compared with the results got through the solution of MTL telegraphic equations by using Matlab language.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123667405","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
Blind receiver based on the LCCMA algorithm for MC-CDMA signals detection over the 3-states channel model 基于LCCMA算法的盲接收机在三态信道模型上对MC-CDMA信号进行检测
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542683
L. Copjan, J. Krahulec, S. Marchevsky
{"title":"Blind receiver based on the LCCMA algorithm for MC-CDMA signals detection over the 3-states channel model","authors":"L. Copjan, J. Krahulec, S. Marchevsky","doi":"10.1109/RADIOELEK.2008.4542683","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542683","url":null,"abstract":"Blind detection is one of the most perspective techniques in signal processing theory. In this paper we describe blind detector based on the linearly constrained constant modulus algorithm (LCCMA). Simulations are oriented on multi-carrier code division multiple access (MC-CDMA) signals when turbo codes are used for error correction of transmitted images. We had investigated the system bit error rate (BER) performance in 3-states channel enlarged with a complex AWGN (additive white Gauss noise) noise. The channel model is assigned for land mobile satellite (LMS) communications. The application of turbo coding strengthens the system ability to cope with multi-path fading and multi-access interference (MAI) significantly.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123821029","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 comparison of GSM-EDGE signal transmission over AWGN and Rayleigh fading channel 在 AWGN 和瑞利衰落信道上传输 GSM-EDGE 信号的比较
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542704
F. Gleissner, S. Hanus
{"title":"The comparison of GSM-EDGE signal transmission over AWGN and Rayleigh fading channel","authors":"F. Gleissner, S. Hanus","doi":"10.1109/RADIOELEK.2008.4542704","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542704","url":null,"abstract":"This paper is concerned with GSM-EDGE system simulation and bit error ratio evaluation of the transmitted signal over AWGN and Rayleigh fading channel. The goal is to observe the impact of radio channel on variously modulated and coded GSM-EDGE signals. The block scheme and proposed model of signal processing in the downlink direction is described step by step. Simulation results for various modulation and coding schemes (MCS) are graphically presented. In order to get the required results, the simulation tool was created in MATLAB environment.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128434025","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
Error resilience tools in the MPEG-4 and H.264 video coding standards MPEG-4和H.264视频编码标准中的错误恢复工具
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542722
J. Mochnáč, S. Marchevsky
{"title":"Error resilience tools in the MPEG-4 and H.264 video coding standards","authors":"J. Mochnáč, S. Marchevsky","doi":"10.1109/RADIOELEK.2008.4542722","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542722","url":null,"abstract":"In this paper we introduce error resilience tools which are used by MPEG-4 and H. 264 video coding standards. MPEG-4 as well as H.264 offers error resilience tools which were implemented by older video coding standards, but they also introduce new tools and improved efficiency of previously used tools. This paper offers only brief review of them, but it focuses on their most important characteristics.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126464265","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
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