发布求助
文献互助 智能选刊 最新文献

2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)最新文献

筛选
英文 中文
Joint Source-Channel Decoding schemes based on structured LDPC codes: Asymptotic analysis and code design 基于结构化LDPC码的联合信源信道译码方案:渐近分析与码设计
2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2010-06-20 DOI: 10.1109/SPAWC.2010.5671060
Ferdaouss Mattoussi, C. Poulliat
{"title":"Joint Source-Channel Decoding schemes based on structured LDPC codes: Asymptotic analysis and code design","authors":"Ferdaouss Mattoussi, C. Poulliat","doi":"10.1109/SPAWC.2010.5671060","DOIUrl":"https://doi.org/10.1109/SPAWC.2010.5671060","url":null,"abstract":"In this paper, we investigate the performance and the design of Joint Source-Channel Decoding (JSCD) schemes involving structured Low-Density Parity-Check (LDPC) codes such as protograph based codes. We first present the asymptotic analysis of such iterative receivers based on multi-dimensional EXIT charts. Since a protograph can be interpreted as different encoding schemes, the information mapping becomes an issue. We will thus show that, using the EXIT chart analysis, it is possible to select the best suited scheme for JSCD. Finally, the design of protographs for JSCD systems is addressed and finite length simulation results are provided.","PeriodicalId":436215,"journal":{"name":"2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134046254","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
Optimum receiver based on single bit quantization 基于单比特量化的最优接收机
2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2010-06-20 DOI: 10.1109/SPAWC.2010.5671062
J. Prainsack, K. Witrisal
{"title":"Optimum receiver based on single bit quantization","authors":"J. Prainsack, K. Witrisal","doi":"10.1109/SPAWC.2010.5671062","DOIUrl":"https://doi.org/10.1109/SPAWC.2010.5671062","url":null,"abstract":"Nonlinear receiver architectures employing a limiting amplifier for analog-to-digital conversion are often applied in low-power wireless communications to reduce hardware complexity and power consumption. These advantages come at the cost of a degradation in performance compared to their linear counterparts. This work presents the optimum receiver for 1-bit quantized signals and provides the analytical relations for the resulting bit error rates (BER) for binary modulation schemes. The linear coherent matched filter receiver is shown to be optimal for 1-bit quantized receive signals in additive white Gaussian noise (AWGN). Finally the BERs for binary frequency shift keying (BFSK) and binary phase shift keying (BPSK) modulation are analyzed exemplarily and the presented relations are confirmed by numerical simulation.","PeriodicalId":436215,"journal":{"name":"2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"425 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132199162","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
Effects of fading and spatial correlation on node selection for estimation in Wireless Sensor Networks 衰落和空间相关对无线传感器网络估计中节点选择的影响
2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2010-06-20 DOI: 10.1109/SPAWC.2010.5671046
Tamim M. Al-Murad, M. Ghogho, A. Swami
{"title":"Effects of fading and spatial correlation on node selection for estimation in Wireless Sensor Networks","authors":"Tamim M. Al-Murad, M. Ghogho, A. Swami","doi":"10.1109/SPAWC.2010.5671046","DOIUrl":"https://doi.org/10.1109/SPAWC.2010.5671046","url":null,"abstract":"In densely deployed sensor networks, correlation among measurements may be high. Spatial sampling through node selection is usually used to minimize this correlation and to save energy consumption. However because of the fading nature of the wireless channels, extra care should be taken when performing this sampling. In this paper, we develop expressions for the distortion which include the channel effects. The asymptotic behavior of the distortion as the number of sensors or total transmit power increase without bound is also investigated. Further, based on the channel and position information we propose and test several node selection schemes.","PeriodicalId":436215,"journal":{"name":"2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133528681","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
Diversity multiplexing tradeoff analysis of coded OFDM systems with linear precoding and linear receivers 具有线性预编码和线性接收机的编码OFDM系统分集复用权衡分析
2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2010-06-20 DOI: 10.1109/SPAWC.2010.5671065
N. Prasad, L. Venturino, Xiaodong Wang
{"title":"Diversity multiplexing tradeoff analysis of coded OFDM systems with linear precoding and linear receivers","authors":"N. Prasad, L. Venturino, Xiaodong Wang","doi":"10.1109/SPAWC.2010.5671065","DOIUrl":"https://doi.org/10.1109/SPAWC.2010.5671065","url":null,"abstract":"In this paper, we investigate coded OFDM systems with linear constellation precoding and linear receivers. A prominent example of such systems is the DFT-Spread-OFDM uplink in the 3GPP LTE based cellular network. We adopt the diversity multiplexing tradeoff framework and show that, in the presence of an ideal outer code, precoding does not improve the diversity order obtained using the optimal decoder. On the other hand, in the presence of an ideal outer code precoding can be detrimental from a diversity order perspective when linear receivers are used. In the latter case, we show that a simple way to guarantee improved diversity orders is to optimize the symbol loading. Finally, we extend our analysis to the multiuser case and propose an algorithm to optimally divide the available subcarriers among the multiple active users.","PeriodicalId":436215,"journal":{"name":"2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"519 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134239046","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
Progressive uplink base station cooperation for backhaul constrained cellular systems 回程受限蜂窝系统的渐进上行基站合作
2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2010-06-20 DOI: 10.1109/SPAWC.2010.5670977
M. Grieger, P. Marsch, G. Fettweis
{"title":"Progressive uplink base station cooperation for backhaul constrained cellular systems","authors":"M. Grieger, P. Marsch, G. Fettweis","doi":"10.1109/SPAWC.2010.5670977","DOIUrl":"https://doi.org/10.1109/SPAWC.2010.5670977","url":null,"abstract":"Base station cooperation is a promising solution to the interference limitation of today's cellular networks. The capacity and fairness gains shown by information theoretical analysis of base station cooperation in cellular networks are huge. However, a major downside is the information exchange among base stations, which is the motivation for recent work on backhaul efficient cooperation schemes. In this paper, we show how imperfect channel knowledge affects the performance of backhaul constrained cooperation schemes. In order to achieve high backhaul efficiency even in the presence of channel estimation errors, we introduce a progressive ad hoc cooperation scheme, which is based on the refinability of source coding schemes.","PeriodicalId":436215,"journal":{"name":"2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123927880","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
Exact performance analysis of decode-and-forward opportunistic relaying 译码转发机会继电器的精确性能分析
2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2010-06-20 DOI: 10.1109/SPAWC.2010.5670815
K. Tourki, Mohamed-Slim Alouini, Hong-Chuan Yang
{"title":"Exact performance analysis of decode-and-forward opportunistic relaying","authors":"K. Tourki, Mohamed-Slim Alouini, Hong-Chuan Yang","doi":"10.1109/SPAWC.2010.5670815","DOIUrl":"https://doi.org/10.1109/SPAWC.2010.5670815","url":null,"abstract":"In this paper, we investigate a dual-hop decode-and-forward opportunistic relaying scheme where the source may or may not be able to communicate directly with the destination. In our study, we consider a regenerative relaying scheme in which the decision to cooperate takes into account the effect of the possible erroneously detected and transmitted data at the best relay. We derive an exact closed-form expression for the end-to-end bit-error rate (BER) of binary phase-shift keying (BPSK) modulation based on the exact statistics of each hop. Unlike existing works where the analysis focused on high signal-to-noise ratio (SNR) regime, such results are important to enable the designers to take decisions regarding practical systems that operate at low SNR regime. We show that performance simulation results coincide with our analytical results.","PeriodicalId":436215,"journal":{"name":"2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116351754","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
Joint resource optimization and relay selection in cooperative cellular networks with imperfect channel knowledge 具有不完全信道知识的协同蜂窝网络联合资源优化与中继选择
2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2010-06-20 DOI: 10.1109/SPAWC.2010.5671058
Ayaz Ahmad, M. Assaad
{"title":"Joint resource optimization and relay selection in cooperative cellular networks with imperfect channel knowledge","authors":"Ayaz Ahmad, M. Assaad","doi":"10.1109/SPAWC.2010.5671058","DOIUrl":"https://doi.org/10.1109/SPAWC.2010.5671058","url":null,"abstract":"In this paper, we study resource allocation and relay selection in a decode-and-forward downlink OFDMA cooperative network assuming imperfect channel state information (CSI) at the base station (BS). We assume that due to feedback delay, the BS has only outdated CSI of BS to users and inter-user links. We propose a centralized optimization framework in which the BS takes decisions on the basis of available outdated CSI given the conditional probability distribution of the current CSI. We approach the problem by using dual optimization framework, decompose it into per-subcarrier optimization problem, and develop an optimal resource allocation and relay selection algorithm. The proposed algorithm minimizes the total transmit power of the system by jointly selecting the best relay node for each source-destination pair, and optimally allocating power and subcarriers to the source and relay nodes under constraints on users' conditional expected data rates. The duality gaps of the solution are virtually zero. Furthermore, we show that the per-subcarrier decomposition of the problem reduces the complexity of the solution from exponential to polynomial. Simulation results show that the system performance may be badly affected by feedback delay. Simulation results also show that users' cooperation significantly reduces the power consumption compared to non-cooperative communication.","PeriodicalId":436215,"journal":{"name":"2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"481 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116400837","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: 22
Compressed sensing techniques for dynamic resource allocation in wideband cognitive networks 宽带认知网络中动态资源分配的压缩感知技术
2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2010-06-20 DOI: 10.1109/SPAWC.2010.5670984
Z. Tian, G. Leus, V. Lottici
{"title":"Compressed sensing techniques for dynamic resource allocation in wideband cognitive networks","authors":"Z. Tian, G. Leus, V. Lottici","doi":"10.1109/SPAWC.2010.5670984","DOIUrl":"https://doi.org/10.1109/SPAWC.2010.5670984","url":null,"abstract":"For multi-user cognitive networks, joint dynamic resource allocation (DRA) and waveform adaptation techniques have been developed that effectively represent, manipulate and utilize the physical-layer radio resources by synthesizing both transmitter and receiver waveforms from generalized signal expansion functions. To effect distributed DRA games, this paper discusses the intertwined sensing task and develops compressed sensing techniques that simultaneously estimate all the channel and interference links using only a small number of samples collected from a sparse set of expansion functions. By properly identifying and utilizing the sparsity properties of a wideband environment, the proposed schemes considerably reduce both sensing time and implementation costs.","PeriodicalId":436215,"journal":{"name":"2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"617 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123951089","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
Simultaneous outage performance in a spectrum-sharing fading environment 频谱共享衰落环境下的同时中断性能
2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2010-06-20 DOI: 10.1109/SPAWC.2010.5670806
Abdoulaye Bagayoko, P. Tortelier, I. Fijalkow
{"title":"Simultaneous outage performance in a spectrum-sharing fading environment","authors":"Abdoulaye Bagayoko, P. Tortelier, I. Fijalkow","doi":"10.1109/SPAWC.2010.5670806","DOIUrl":"https://doi.org/10.1109/SPAWC.2010.5670806","url":null,"abstract":"We consider two different users sharing the same spectrum resource, interfering with each other, under outage performance requirements for both the users. We derive a practical condition to enable the spectrum-sharing under simultaneous outage performance. Furthermore, when the condition is fulfilled, we provide equations to define the two-dimensional region of allocated powers (P1, P2), for the two users, where a given simultaneous outage performance is achievable. Numerical examples are given to illustrate our results. The framework presented in this paper covers more general settings and the results can be used to build power scheduling and sharing rules for licensed or unlicensed bands.","PeriodicalId":436215,"journal":{"name":"2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125445762","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
Distributed transmit beamforming based on a 3-bit feedback system 基于3位反馈系统的分布式发射波束形成
2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Pub Date : 2010-06-20 DOI: 10.1109/SPAWC.2010.5670903
W. Tushar, David B. Smith
{"title":"Distributed transmit beamforming based on a 3-bit feedback system","authors":"W. Tushar, David B. Smith","doi":"10.1109/SPAWC.2010.5670903","DOIUrl":"https://doi.org/10.1109/SPAWC.2010.5670903","url":null,"abstract":"A distributed transmit beamforming technique is developed for both a static and a time-varying channel in a wireless sensor network. This algorithm is based on an iterative procedure that synchronizes the transmitters to send a common message signal coherently to the receiver, using a 3-bit feedback in each timeslot. Results show that the received power increases quadratically with number of transmitters, and there is a substantially improved performance over a 1-bit feedback system and system without feedback.","PeriodicalId":436215,"journal":{"name":"2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":"332 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130925615","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: 19
首页 上一页
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