发布求助
文献互助 智能选刊 最新文献

2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications最新文献

筛选
英文 中文
Closed-Form Outage Probability and BER of MIMO Zero-Forcing Receiver in the Presence of Imperfect CSI 不完全CSI存在下MIMO强制零接收机的闭式中断概率和误码率
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346359
Cheng Wang, E. Au, R. Murch, V. Lau
{"title":"Closed-Form Outage Probability and BER of MIMO Zero-Forcing Receiver in the Presence of Imperfect CSI","authors":"Cheng Wang, E. Au, R. Murch, V. Lau","doi":"10.1109/SPAWC.2006.346359","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346359","url":null,"abstract":"Zero-forcing (ZF) detection is a simple and effective technique for retrieving multiple transmitted data streams at the receiver in multiple-input multiple-output (MIMO) wireless antenna systems. However the detection requires accurate channel state information (CSI) which may not be available in practice. In this paper, the impact of imperfect CSI on the performance of MIMO ZF receiver over uncorrelated Rayleigh flat fading channel is analytically assessed. In particular, tight approximation of the post-processing SNR distribution is derived and system performance in terms of outage probability and the BER of MPSK modulation is obtained in closed-form. The tightness of our analytical approximation is verified by the simulation results","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128113739","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: 31
A Full-Diversity Distributed Space-Time Coding System with Regenerative Relays 具有再生中继的全分集分布式空时编码系统
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346394
P. Anghel, G. Leus, Mostafa Kaveh
{"title":"A Full-Diversity Distributed Space-Time Coding System with Regenerative Relays","authors":"P. Anghel, G. Leus, Mostafa Kaveh","doi":"10.1109/SPAWC.2006.346394","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346394","url":null,"abstract":"We propose a distributed space-time coding (DSTC) systems based on the Alamouti design. We discuss the limitations in the relay channel of the \"out of the box\" Alamouti scheme and the additional complexity required to overcome its loss of diversity. Using a bit error rate based antenna selection approach, we design DSTC systems with one regenerative relay that improve on the classical Alamouti scheme when utilized in a two-hop channel. We prove that the proposed one relay DSTC system collects the full diversity of the distributed MISO channel. We also introduce a less complex DSTC system in which the relaying energies depend on the error probabilities at the relays. Numerical results show that the proposed systems perform close to the error probability lower bound obtained by considering error-free reception at the relays","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128157162","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
Tomlinson-Harashima Precoding with Adaptive Modulation for Fixed Relay Networks 固定中继网络自适应调制的Tomlinson-Harashima预编码
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346437
Taiwen Tang, C. Chae, R. Heath, Sunghyun Cho
{"title":"Tomlinson-Harashima Precoding with Adaptive Modulation for Fixed Relay Networks","authors":"Taiwen Tang, C. Chae, R. Heath, Sunghyun Cho","doi":"10.1109/SPAWC.2006.346437","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346437","url":null,"abstract":"In this paper, a relaying strategy that uses multiple input multiple output (MIMO) fixed relays with linear processing for multiuser transmission in cellular networks is proposed. This approach applies to the two hop relaying scenario for coverage enhancement, where the base station transmits data to multiple users through one fixed relay (multiuser transmission). The fixed relay processes the received signal by applying a linear transformation and forwards the processed signal to multiple users. We propose an implementable multiuser precoding strategy that combines Tomlinson-Harashima precoding at the base station and linear signal processing at the relay with adaptive stream selection and QAM modulation. We propose a reduced complexity algorithm to select a subset of users to avoid an exhaustive search over all user permutations. Simulations illustrate the sum rate using Tomlinson-Harashima precoding without coding","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121459490","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
Identifiability of BPSK, MSK and QPSK FIR SISO Channels from Modified Second-Order Statistics 基于修正二阶统计量的BPSK、MSK和QPSK FIR SISO信道的可识别性
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346373
J. Delmas, P. Comon, Y. Meurisse
{"title":"Identifiability of BPSK, MSK and QPSK FIR SISO Channels from Modified Second-Order Statistics","authors":"J. Delmas, P. Comon, Y. Meurisse","doi":"10.1109/SPAWC.2006.346373","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346373","url":null,"abstract":"This paper considers the problem of blind estimation of finite impulse responses (FIR) of single-input single-output (SISO) channels from second order statistics of transformed data, when the channel is excited by binary phase shift keying (BPSK), minimum shift keying (MSK) or quadrature phase shift keying (QPSK) inputs. Identifiability conditions are derived by considering that noncircularity induces diversity. Performance issues are also addressed by using standard subspace-based estimators, with benchmarks such as asymptotically minimum variance (AMV) bounds based on different statistics","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128797742","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
Convergence Behavior of Matrix-Based Iterative Transceiver Optimization 基于矩阵迭代的收发器优化的收敛性
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346419
H. Boche, M. Schubert
{"title":"Convergence Behavior of Matrix-Based Iterative Transceiver Optimization","authors":"H. Boche, M. Schubert","doi":"10.1109/SPAWC.2006.346419","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346419","url":null,"abstract":"We analyze and compare two iterative algorithms for the joint optimization of powers and receive strategies in a multiuser network. The design goal is to minimize the total power while fulfilling individual QoS requirements. This problem can be solved by the fixed-point iteration proposed by Yates, (1995) as well as by a recently proposed matrix-based iteration (M. Schubert and H. Boche, 2006; H. Boche et al., 2005). It was observed in the literature that the matrix-based iteration has an excellent convergence speed. However, an analytical investigation of the convergence behavior has been an open problem so far. In this paper, we show that the matrix-based iteration performs better than the fixed-point iteration in each step, given the same initialization. The resulting sequence of power vectors is component-wise monotonic decreasing. We also show that the matrix-based iteration has super-linear convergence. If the underlying interference functions are smooth, then the algorithm even has quadratic convergence, whereas the convergence of the fixed-point iteration is only linear, and depends on the system load. This explains the convergence behavior observed from simulations","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116088853","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: 8
A Novel Decision-Feedback Receiver for MBOK Direct Sequence Ultra-Wideband Radio 一种新型MBOK直接序列超宽带无线电决策反馈接收机
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346369
Jeng-Kuang Hwang, Yu-Lun Chiu, R. Chung
{"title":"A Novel Decision-Feedback Receiver for MBOK Direct Sequence Ultra-Wideband Radio","authors":"Jeng-Kuang Hwang, Yu-Lun Chiu, R. Chung","doi":"10.1109/SPAWC.2006.346369","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346369","url":null,"abstract":"A high performance and computation efficient decision-feedback receiver for M-ary bi-orthogonal keying (MBOK) direct-sequence ultra-wideband radio (DS-UWB) is proposed. First, an insightful vector-matrix signal model for UWB channel dispersion over many consecutive symbols is built up. Then, by modifying a baseline MBOK-RAKE receiver, we propose a novel RAKE with bidirectional decision feedback (RAKE-BDDF) receiver to efficiently cancel both the post-cursor and pre-cursor intersymbol interference (ISI) and multi-code interference (MCI) at symbol rate. Simulation results are included for 802.15.3a CM2 and CM4 UWB channels. It is seen that the RAKE-BDDF receiver can attain a performance close to the matched filter bound, with only a slight increase in the receiver complexity than that of the RAKE receiver","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115338129","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
LOS-NLOS Situation Tracking for Positioning Systems 定位系统的LOS-NLOS态势跟踪
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346436
J. M. Huerta, Josep Vidal
{"title":"LOS-NLOS Situation Tracking for Positioning Systems","authors":"J. M. Huerta, Josep Vidal","doi":"10.1109/SPAWC.2006.346436","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346436","url":null,"abstract":"The position estimation accuracy is severely impaired by the nonline of sight (NLOS) effect present in urban scenarios. When estimating the position of a mobile terminal (MT) using some base stations (BS), it is of vital importance to know which ones are in NLOS with the MT. The present document shows a dual tracker system to follow the LOS-NLOS situations and the position of a MT. The first tracker provides an estimation of the probability of being at each situation. This information is used by the second tracker, an improved unscented Kalman filter, to weight the information from each BS to enhance the final positioning accuracy. The approach is tested under a real scenario with severe NLOS conditions and with a limited number of available BS","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114391293","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
PAR Reduction in the Uplink for OFDMA Systems OFDMA系统上行链路PAR降低
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346393
B. Krongold
{"title":"PAR Reduction in the Uplink for OFDMA Systems","authors":"B. Krongold","doi":"10.1109/SPAWC.2006.346393","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346393","url":null,"abstract":"Orthogonal frequency-division multiple access (OFDMA) technology is being considered for uplink (UL) transmission in future mobile standards. While such systems can enjoy the advantages of OFDM, it also shares its disadvantages, and in particular, a large peak-to-average power ratio (PAR). PAR reduction techniques can be employed, but with a fraction of the bandwidth used by each user, the UL-OFDMA scenario is different than for traditional OFDM systems. Tone reservation has been proposed as one technique in recent 3GPP standards meetings, but in this paper, we offer more efficient algorithms that are well-suited for the UL-OFDMA case and easily incorporate any necessary power-spectral density (PSD) constraints","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114694548","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
Space-Time Block Coding: Joint Detection and Channel Estimation using Multiple Model Theory 空时分组编码:多模型理论联合检测与信道估计
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346407
H. Kulatunga, V. Kadirkamanathan
{"title":"Space-Time Block Coding: Joint Detection and Channel Estimation using Multiple Model Theory","authors":"H. Kulatunga, V. Kadirkamanathan","doi":"10.1109/SPAWC.2006.346407","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346407","url":null,"abstract":"A joint decoding method for space-time block codes is presented. The space-time coded signals can be viewed as a first-order Markov chain, permitting the development of a multiple model algorithm. Therefore the quasi-static assumption can be relaxed and joint channel and symbol estimation is carried out at each time-instant as opposed to at the end of a block duration","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122736995","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
Optimization Combined Chip and Symbol Level Equalization for Downlink WCDMA Reception WCDMA下行接收的芯片与符号电平均衡组合优化
2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI: 10.1109/SPAWC.2006.346439
A. Bastug, D. Slock
{"title":"Optimization Combined Chip and Symbol Level Equalization for Downlink WCDMA Reception","authors":"A. Bastug, D. Slock","doi":"10.1109/SPAWC.2006.346439","DOIUrl":"https://doi.org/10.1109/SPAWC.2006.346439","url":null,"abstract":"We consider iterative WCDMA receiver techniques for the UMTS FDD downlink. The popular LMMSE chip equalizer-correlator receiver does not exploit subspaces in partially loaded systems. This is in contrast to the symbol level LMMSE receiver, which is time-varying though, due to the scrambler, and hence too complex to implement. A compromise can be found by performing symbol level multi-stage Wiener filtering (MSWF), which is an iterative solution in which the complexity per iteration becomes comparable to twice that of the RAKE receiver. Since the MSWF works best when the input is white, better performance is obtained if the RAKE in each MSWF stage gets replaced by a chip equalizer-correlator. One of the main contributions here is to point out that the chip equalizer benefits from a separate optimization in every stage. This is shown through a mix of analysis and simulation results","PeriodicalId":414942,"journal":{"name":"2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116618486","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
首页 上一页 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：604180095
Book学术官方微信