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2012 Australian Communications Theory Workshop (AusCTW)最新文献

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Full diversity binary message-passing decoders for block fading channels 块衰落信道的全分集二进制消息传递解码器
2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164908
Rajan Kadel, G. Lechner
{"title":"Full diversity binary message-passing decoders for block fading channels","authors":"Rajan Kadel, G. Lechner","doi":"10.1109/AusCTW.2012.6164908","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164908","url":null,"abstract":"Binary message-passing (BMP) decoders for root-low-density parity-check (LDPC) codes over block fading channels (BFC) are studied using density evolution (DE) and outage boundary analysis. A-priori channel estimation techniques suitable for root-LDPC code are proposed based on DE. The results show that BMP decoders can achieve full diversity performance if soft decisions from the channel are available.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125980616","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
Distributed energy consumption minimization for lossless data gathering wireless sensor networks 分布式能源消耗最小化无损数据采集无线传感器网络
2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164922
Volkan Dedeoglu, S. Perreau, A. Grant
{"title":"Distributed energy consumption minimization for lossless data gathering wireless sensor networks","authors":"Volkan Dedeoglu, S. Perreau, A. Grant","doi":"10.1109/AusCTW.2012.6164922","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164922","url":null,"abstract":"In this paper, we propose a distributed optimization algorithm that minimizes the energy consumption of lossless data gathering wireless sensor networks by allocating variable transmit power and data compression/transmission rate to each sensor node. Using the Lagrange duality, we decompose the convex energy consumption minimization problem into subproblems, which can be solved by the sensor nodes distributively. The convergence of the iterative algorithm is demonstrated by the simulations.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128845189","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
Relaying energy allocation in training-based amplify and forward relay communications 基于训练的放大和转发中继通信中的中继能量分配
2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164897
Xiangyun Zhou, T. Lamahewa, P. Sadeghi, A. Hjørungnes
{"title":"Relaying energy allocation in training-based amplify and forward relay communications","authors":"Xiangyun Zhou, T. Lamahewa, P. Sadeghi, A. Hjørungnes","doi":"10.1109/AusCTW.2012.6164897","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164897","url":null,"abstract":"We consider relay-assisted communication in a training-based transmission scheme. Each transmission block consists of a training phase and a data transmission phase. The relay node employs the amplify-and-forward protocol during all transmissions. We focus on the relay signaling design and investigate the benefit of allowing for different relaying power during the training phase and the data transmission phase. Specifically, the relaying energy allocation between the two phases is optimized for maximizing the average received signal-to-noise ratio at the destination node. We study this optimization problem for both single-antenna relay and multi-antenna relay and derive a simple closed-form relaying energy allocation strategy that achieves near-optimal performance. This closed-form strategy depends only on the length of the data transmission phase but not on other system parameters such as the relaying energy budget, the number of antennas at the relay, and the distances between the source, relay and destination nodes.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116348745","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
Distributed delay minimization in stochastic routing for wireless sensor networks 无线传感器网络随机路由中的分布式时延最小化
2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164915
U. Wijetunge, S. Perreau, A. Pollok
{"title":"Distributed delay minimization in stochastic routing for wireless sensor networks","authors":"U. Wijetunge, S. Perreau, A. Pollok","doi":"10.1109/AusCTW.2012.6164915","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164915","url":null,"abstract":"Improving the packet transmission delay is one of the major challenges of stochastic routing in wireless sensor networks: the use of random paths from source to destination nodes results in longer routes on average, which is not desirable in delay-sensitive applications. In this paper, we propose a novel distributed and decentralized stochastic routing algorithm to minimize the average packet transmission delay of the network. We also provide an analytical expression for the average packet transmission delay for a circular network using a discrete time Markov chain model and we discuss the performance improvement with respect to random walking methods. Simulation results demonstrate that our proposed routing method significantly improves the average packet transmission delay when compared to existing methods and provides a near optimal solution.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124940206","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
Symbol error rate performance for macrodiversity maximal ratio combining in flat Rayleigh fading 平坦瑞利衰落下宏分集最大比组合的符号误码率性能
2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164901
Dushyantha A. Basnayaka, Peter J. Smith, Philippa A. Martin
{"title":"Symbol error rate performance for macrodiversity maximal ratio combining in flat Rayleigh fading","authors":"Dushyantha A. Basnayaka, Peter J. Smith, Philippa A. Martin","doi":"10.1109/AusCTW.2012.6164901","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164901","url":null,"abstract":"The performance of maximal ratio combining (MRC) in Rayleigh channels with co-channel interference (CCI) is well-known for receive arrays which are co-located. Recent work in network MIMO, edge-excited cells and base station collaboration is increasing interest in macrodiversity systems. Hence, in this paper we consider MRC performance in Rayleigh channels with CCI and a macrodiversity architecture. This appears to be the first analytical work in this area. We derive approximate symbol error rate results for MPSK and M-QAM and exact results for BPSK modulations. Numerical results, verified by simulations, are used in conjunction with the analysis to gain insight into the effects of the link powers on performance.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130814024","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
Power allocation in underlay cognitive radio systems with feasibility detection 基于可行性检测的底层认知无线电系统的功率分配
2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AUSCTW.2012.6164920
Sudhir Singh, Paul D. Teal, P. Dmochowski, A. Coulson
{"title":"Power allocation in underlay cognitive radio systems with feasibility detection","authors":"Sudhir Singh, Paul D. Teal, P. Dmochowski, A. Coulson","doi":"10.1109/AUSCTW.2012.6164920","DOIUrl":"https://doi.org/10.1109/AUSCTW.2012.6164920","url":null,"abstract":"We consider a cognitive radio system with N secondary user (SU) pairs and a pair of primary users (PU). The SU power allocation problem is formulated as a capacity maximisation problem under PU and SU quality of service and SU peak power constraints. The problem is formulated as a geometric program, solved for both low- and high- signal-to-interference-and-noise ratio (SINR) regimes. We present a novel method of detecting and removing infeasible SU quality of service constraints from the SU power allocation problem that results in considerably improved SU performance. Capacity cumulative distribution functions for Rayleigh fading channels are produced.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128567688","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
Link adaptation of FAHOR communication system FAHOR通信系统的链路适配
2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AUSCTW.2012.6164917
M. Khan, W. Cowley, K. Nguyen
{"title":"Link adaptation of FAHOR communication system","authors":"M. Khan, W. Cowley, K. Nguyen","doi":"10.1109/AUSCTW.2012.6164917","DOIUrl":"https://doi.org/10.1109/AUSCTW.2012.6164917","url":null,"abstract":"Radio frequency (RF) spectrum is already too crowded for new broadband channels. Free space optical (FSO) communication is an emerging technology which offers enormous bandwidth, low setup cost and highly secure link. However, FSO links may be deteriorated significantly by scintillation and weather conditions (fog/cloud). Hybrid FSO-RF communication is an attractive alternate to handle the issues encountered in individual channels. We propose a novel flexible adaptive hybrid FSO-RF (FAHOR) communication system for reliable transmission under varying weather conditions. We develop adaptive modulation and power allocation rules for maximum FAHOR mutual information (MI) which gives significant improvement of 2.5 dBs over non-adaptive schemes.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124463810","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: 12
Non-cooperative power control game in a multi-source wireless sensor network 多源无线传感器网络中的非合作功率控制博弈
2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164904
W. Tushar, David B. Smith, T. Lamahewa, J. Zhang
{"title":"Non-cooperative power control game in a multi-source wireless sensor network","authors":"W. Tushar, David B. Smith, T. Lamahewa, J. Zhang","doi":"10.1109/AusCTW.2012.6164904","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164904","url":null,"abstract":"In this paper, a game theoretic scheme is proposed to study power control in a multi-source (transmitting to multiple clusters) wireless sensor network. A game where each sensor chooses it's transmit power independently to achieve a target signal to interference plus noise ratio (SINR) at the master sensor in the receiving cluster is analyzed. It is shown that the game has a Nash equilibrium and it is unique under certain constraints. Numerical results are provided to show the effectiveness of the proposed game considering distance-dependent attenuation with various path loss exponents.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115525700","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: 11
Are DS-CDMA indoor system deployments appropriate for OFDM networks? DS-CDMA室内系统部署适合OFDM网络吗?
2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164910
S. Namik, K. Sowerby, M. Neve
{"title":"Are DS-CDMA indoor system deployments appropriate for OFDM networks?","authors":"S. Namik, K. Sowerby, M. Neve","doi":"10.1109/AusCTW.2012.6164910","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164910","url":null,"abstract":"The proliferation of wireless systems (especially in the license-exempt bands) in indoor environments in today's world is a key motivator to enabling optimum coexistence between wireless networks in close physical proximity. One prominent technology that is popular with contemporary wireless systems is orthogonal frequency division multiplexing (OFDM). However, as OFDM networks replace already existing direct sequence-code division multiple access (DS-CDMA) networks, a key question confronts radio engineers and system designers: will the network upgrade necessitate a redeployment of the DS-CDMA base stations to provide optimum OFDM system performance? In this paper, we compare the effects of base station deployment configurations between OFDM and DS-CDMA networks in two architecturally different indoor environments using a set of RF path loss measurements to provide the channel models.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116647320","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
A comparison of linear transceiver techniques in multiuser MIMO broadcast systems 多用户MIMO广播系统中线性收发技术的比较
2012 Australian Communications Theory Workshop (AusCTW) Pub Date : 2012-03-09 DOI: 10.1109/AusCTW.2012.6164902
A. Firag, Peter J. Smith, A. Papathanassiou, M. Shafi, Dushyantha A. Basnayaka, Philippa A. Martin
{"title":"A comparison of linear transceiver techniques in multiuser MIMO broadcast systems","authors":"A. Firag, Peter J. Smith, A. Papathanassiou, M. Shafi, Dushyantha A. Basnayaka, Philippa A. Martin","doi":"10.1109/AusCTW.2012.6164902","DOIUrl":"https://doi.org/10.1109/AusCTW.2012.6164902","url":null,"abstract":"Zero-forcing (ZF), block diagonalization (BD) and signal to leakage and noise ratio (SLNR) are three well known linear precoders for multiuser MIMO broadcast systems. In this paper, we compare their signal-to-interference-plus-noise ratio (SINR) performance assuming that, where necessary, the users employ minimum mean square error (MMSE) receivers. A range of channel models, system layouts and feedback scenarios are considered. In all cases, it is found that SLNR provides the best performance with a complexity that is similar to BD.","PeriodicalId":320391,"journal":{"name":"2012 Australian Communications Theory Workshop (AusCTW)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134164461","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
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