发布求助
文献互助 智能选刊 最新文献

1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)最新文献

筛选
英文 中文
Multistage linear successive interference cancellation for multipath decorrelating detection in fading channels 衰落信道中多径去相关检测的多级线性逐次干扰对消
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304) Pub Date : 1999-05-09 DOI: 10.1109/SPAWC.1999.783050
Yao Ma, Teng Joon Lim
{"title":"Multistage linear successive interference cancellation for multipath decorrelating detection in fading channels","authors":"Yao Ma, Teng Joon Lim","doi":"10.1109/SPAWC.1999.783050","DOIUrl":"https://doi.org/10.1109/SPAWC.1999.783050","url":null,"abstract":"In order to reduce the computational complexity of the decorrelating detector in multipath fading asynchronous CDMA channels, we consider implementing it by linear multistage successive interference cancellation (MSIC), derived from the Gauss-Seidel iterations. In this paper we propose a multipath decorrelating SIC (MD-SIC) with differentially coherent equal gain combining (DEGC). The convergence issues and bit error rate (BER) of the MSIC scheme are analysed. Numerical results show that the proposed detector performs closely to the ideal decorrelating detector with a moderate number of stages.","PeriodicalId":365086,"journal":{"name":"1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116995499","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
Tackling timing offsets when separating co-channel signals 在分离同信道信号时处理时序偏移
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304) Pub Date : 1999-05-09 DOI: 10.1109/SPAWC.1999.783038
A. Kannan, T. P. Krauss, M. Zoltowski
{"title":"Tackling timing offsets when separating co-channel signals","authors":"A. Kannan, T. P. Krauss, M. Zoltowski","doi":"10.1109/SPAWC.1999.783038","DOIUrl":"https://doi.org/10.1109/SPAWC.1999.783038","url":null,"abstract":"In this paper, we propose a method for obtaining a resynchronized symbol rate sampled co-channel signal from a sum of suitably oversampled co-channel signals which have the same data clock but are not necessarily exactly time-aligned. The method works by estimating the relative timing offsets of the data clocks of the different up-link signals and using them to design a bank of filters operating at symbol rate whose outputs can be added to give a resynchronized signal. The filters can be designed to minimize the noise gain as well as force this signal to adhere to a signal model used very often in co-channel signal separation methods.","PeriodicalId":365086,"journal":{"name":"1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121031523","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
Wavelet-based separating kernels for sequence estimation with unknown rapidly time-varying channels 基于小波分离核的未知快速时变信道序列估计
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304) Pub Date : 1999-05-09 DOI: 10.1109/SPAWC.1999.783067
M. Martone
{"title":"Wavelet-based separating kernels for sequence estimation with unknown rapidly time-varying channels","authors":"M. Martone","doi":"10.1109/SPAWC.1999.783067","DOIUrl":"https://doi.org/10.1109/SPAWC.1999.783067","url":null,"abstract":"A new method for blind maximum likelihood sequence estimation is proposed. The unknown channel time variations are decomposed using optimal unconditional bases such as orthonormal wavelet bases. We show that it is possible to represent the channel in a reduced order dimensional space by matching the scattering function of the multipath channel to its decomposition and obtain an approach to per-survivor processing that is effective in fast fading environments such as those practically found in macrocell wireless communication applications.","PeriodicalId":365086,"journal":{"name":"1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121047163","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 new time synchronization algorithm for multi-carrier CDMA signals 一种新的多载波CDMA信号时间同步算法
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304) Pub Date : 1999-05-09 DOI: 10.1109/SPAWC.1999.783033
Hyo-A Lee, G. Choi, Changwoo Lee
{"title":"A new time synchronization algorithm for multi-carrier CDMA signals","authors":"Hyo-A Lee, G. Choi, Changwoo Lee","doi":"10.1109/SPAWC.1999.783033","DOIUrl":"https://doi.org/10.1109/SPAWC.1999.783033","url":null,"abstract":"This paper discusses the effects of a time synchronization error on multi-carrier CDMA signals. The time synchronization consists of FFT symbol time recovery and sampling clock recovery. In general, symbol time recovery is carried out before sampling clock adjustments. The problem for the time synchronization errors is the sample rob/stuff phenomenon due to symbol time offset. Thus a more efficient synchronization algorithm is required. This paper introduces a new time synchronization algorithm for multi-carrier CDMA signals, which consists of symbol time recovery and sampling clock adjustment using the pilot symbols. Our algorithm is performed, and validated by computer simulation under both AWGN and multipath fading channel. We demonstrate that the proposed algorithm can obtain two time synchronization errors simultaneously.","PeriodicalId":365086,"journal":{"name":"1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114141588","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
Channel identification and sequential sequence estimation using antenna array in broadband mobile communications 宽带移动通信中基于天线阵列的信道识别与序列估计
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304) Pub Date : 1999-05-09 DOI: 10.1109/SPAWC.1999.783103
T. Matsumoto
{"title":"Channel identification and sequential sequence estimation using antenna array in broadband mobile communications","authors":"T. Matsumoto","doi":"10.1109/SPAWC.1999.783103","DOIUrl":"https://doi.org/10.1109/SPAWC.1999.783103","url":null,"abstract":"This paper proposes the joint use of antenna array and sequential sequence estimation (SSE) technique for the equalization of multipath fading channels suffering from severe ISI. It is shown that with the proper use of the multiple stack algorithm (MSA), exploiting the redundant structure of the signal received by multiple antenna array elements can enhance the uniqueness of the sequence estimation, thereby significantly reducing the frame erasure probability. Three new algorithms are derived for vector channel identification, the results of which are used to calculate the Fano metric for SSE. The first algorithm uses just a temporal reference, and others use both temporal and spatial references. The impacts of using the temporal and spatial references are investigated in terms of the channel identification accuracy as well as overall frame erasure rate (ERR) and bit error rate (BER). The results of computer simulations are presented to compare the performances of the three algorithms.","PeriodicalId":365086,"journal":{"name":"1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114165951","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
Training sequence based multiuser channel identification for cochannel interference cancellation in GSM GSM中基于训练序列的多用户信道识别共信道干扰消除
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304) Pub Date : 1999-05-09 DOI: 10.1109/SPAWC.1999.783029
H. Trigui, D. Slock
{"title":"Training sequence based multiuser channel identification for cochannel interference cancellation in GSM","authors":"H. Trigui, D. Slock","doi":"10.1109/SPAWC.1999.783029","DOIUrl":"https://doi.org/10.1109/SPAWC.1999.783029","url":null,"abstract":"We address the problem of the joint identification of the channel impulse responses of almost-synchronous cochannel users. This problem arises in a cellular system using the time division multiple access (TDMA) scheme where the base stations are assumed to be synchronized and the radius of the cells is limited to a few kilometers. After the partial equalization of the transmit pulse shape filter which compensates for the intersymbol interference (ISI) introduced by the GMSK modulation (used in GSM), the receiver should detect the active training sequences by a synchronization step and then estimates the corresponding channel impulse responses by the standard least squares (LS) method. The spatio-temporal receiver used in our simulations for demodulating the signal of interest modeling the interferers as Gaussian colored noise is the interference cancelling matched filter (ICMF) which we introduced previously.","PeriodicalId":365086,"journal":{"name":"1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116609449","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
A parameterized maximum likelihood method for multipaths channels estimation 多径信道估计的参数化极大似然方法
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304) Pub Date : 1999-05-09 DOI: 10.1109/SPAWC.1999.783100
N. Bertaux, P. Larzabal, C. Adnet, É. Chaumette
{"title":"A parameterized maximum likelihood method for multipaths channels estimation","authors":"N. Bertaux, P. Larzabal, C. Adnet, É. Chaumette","doi":"10.1109/SPAWC.1999.783100","DOIUrl":"https://doi.org/10.1109/SPAWC.1999.783100","url":null,"abstract":"In paths localization, a resolution that goes beyond the classical Rayleigh beamwidth is of great interest. To improve the resolution, model based techniques have been introduced (high resolution methods), but they are very sensitive to noise correlation and they assume underlying data model. We develop a parameterized maximum likelihood (PML) technique, based on a knowledge of the transmitted signal. We develop the exact PML approach and present its implementation by a Gauss Newton procedure. Simulations on data sets are examined. The performances are compared to the Cramer Rao bound. Its superiority over the traditional matched filter (MF) and the conditional maximum likelihood (CML) is shown. The paper concludes with the improvements introduced by a knowledge of the transmitted signals.","PeriodicalId":365086,"journal":{"name":"1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129448313","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
Carrier independent blind initialization of a DFE 与载波无关的DFE盲初始化
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304) Pub Date : 1999-05-09 DOI: 10.1109/SPAWC.1999.783063
T. Endres, C. Strolle, S. Hulyalkar, T. A. Schaffer, A. Shah, M. Gittings, C. Hollowell, A. Bhaskaran, J. Roletter, B. Paratore
{"title":"Carrier independent blind initialization of a DFE","authors":"T. Endres, C. Strolle, S. Hulyalkar, T. A. Schaffer, A. Shah, M. Gittings, C. Hollowell, A. Bhaskaran, J. Roletter, B. Paratore","doi":"10.1109/SPAWC.1999.783063","DOIUrl":"https://doi.org/10.1109/SPAWC.1999.783063","url":null,"abstract":"This paper is concerned with the blind initialization of a decision feedback equalizer (DFE) in a practical setting. We present a DFE architecture with forward and feedback filters which operate in the passband so that equalization can be done completely independent of carrier phase. The constant modulus algorithm (CMA) error term is used to update the forward and feedback equalizer parameters of a linear infinite impulse response (IIR) equalizer structure in order to acquire an equalizer parameterization which is in the neighborhood of the optimum DFE setting. Methods for coarse tuning of a decision directed (DD) carrier loop during acquisition are also described. Laboratory experiments with test silicon demonstrate the similarity in equalizer parameter settings between CMA in a linear IIR structure with those of the DD least mean squares algorithm (DD-LMS) in a linear IIR structure and in a non-linear DFE structure.","PeriodicalId":365086,"journal":{"name":"1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126203238","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: 15
The quantitative effects of inaccurate uplink spatial signature observations on downlink signal to interference ratio 上行空间特征观测不准确对下行信噪比的定量影响
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304) Pub Date : 1999-05-09 DOI: 10.1109/SPAWC.1999.783089
A. Arredondo, K. Dandekar, G. Xu
{"title":"The quantitative effects of inaccurate uplink spatial signature observations on downlink signal to interference ratio","authors":"A. Arredondo, K. Dandekar, G. Xu","doi":"10.1109/SPAWC.1999.783089","DOIUrl":"https://doi.org/10.1109/SPAWC.1999.783089","url":null,"abstract":"We have found that at least 20% of the time, variations of up to 50% relative angle change in the uplink spatial signature (SS) may produce insignificant degradation (less than 2 dB) in SIR at the mobile regardless of the downlink beamforming method. Although the pseudoinverse spatial signature downlink beamforming method is the most sensitive to the uplink SS relative angle change, its superior absolute performance allows it to withstand relative angle change of up to 60% and still produce a better downlink SIR than the other downlink methods.","PeriodicalId":365086,"journal":{"name":"1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132159899","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
Performance analysis of maximum likelihood detector for non-orthogonal multiuser signals 非正交多用户信号的最大似然检测器性能分析
1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304) Pub Date : 1999-05-09 DOI: 10.1109/SPAWC.1999.783010
W. Ma, K. Wong, P. Ching
{"title":"Performance analysis of maximum likelihood detector for non-orthogonal multiuser signals","authors":"W. Ma, K. Wong, P. Ching","doi":"10.1109/SPAWC.1999.783010","DOIUrl":"https://doi.org/10.1109/SPAWC.1999.783010","url":null,"abstract":"The maximum likelihood (ML) detector is an optimum detector for non-orthogonal multiuser signals since its probability of error is the minimum. Due to its complexity, performance analysis of the ML detector has relied heavily on approximation bounds obtained by the technique of error sequence decomposition. In this paper, exact formulas for the error probabilities of the ML detector are developed. The exact solutions are in the form of multi-dimensional integrals, and it is possible to numerically compute them. Simulation examples are used to verify the theoretical results.","PeriodicalId":365086,"journal":{"name":"1999 2nd IEEE Workshop on Signal Processing Advances in Wireless Communications (Cat. No.99EX304)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114658741","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
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信