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2012 International Symposium on Wireless Communication Systems (ISWCS)最新文献

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Performance analysis of amplify-and-forward relay system with interference-limited destination in different fading environments 不同衰落环境下目的地限制干扰的放大转发中继系统性能分析
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328357
A. Salhab, F. Al-Qahtani, S. Zummo, H. Alnuweiri
{"title":"Performance analysis of amplify-and-forward relay system with interference-limited destination in different fading environments","authors":"A. Salhab, F. Al-Qahtani, S. Zummo, H. Alnuweiri","doi":"10.1109/ISWCS.2012.6328357","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328357","url":null,"abstract":"In this paper, we evaluate the performance of a dual-hop fixed-gain amplify-and-forward (AF) relay system in the presence of co-channel interference (CCI) at the destination node. The desired user channels are assumed to follow the Rayleigh distribution and different fading environments for interferers' channels have been considered, Rayleigh, Nakagami-m, and Rician. We derive exact closed-form expressions for the outage probability and the symbol error rate (SER) for the Rayleigh and Nakagami-m cases, and accurate approximations for the case of Rician distributed interferers' channels. Both, the independent non-identically distributed (i.n.d.) and independent identically distributed (i.i.d.) cases of interferers' channels have been considered in this paper. Furthermore, a look into the asymptotical high signal-to-noise ratio (SNR) performance has been taken and the diversity order and coding gain of the proposed fading environments are compared. Finally, the Monte Carlo simulations are provided to validate the analytical and asymptotic results and to illustrate the effect of interference on the system performance.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124664584","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
Deterministic approach for hypercomplex generalized orthogonal design (DAHOD) 超复广义正交设计(DAHOD)的确定性方法
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328459
D. Schulz, J. Seitz
{"title":"Deterministic approach for hypercomplex generalized orthogonal design (DAHOD)","authors":"D. Schulz, J. Seitz","doi":"10.1109/ISWCS.2012.6328459","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328459","url":null,"abstract":"There has been much research on efficient spacetime coding during the past years. The idea of orthogonal coding has later been extended to new degrees of freedom like polarization and frequency (OFDM) as well. The majority of the research concerning code matrices still concentrates on real and complex codes. However, there has been some change in the very past where also quaternions came into play. Nevertheless, hypercomplex numbers like quaternions, octonions and others are still used rarely. One reason we saw was that there is no general idea and construction scheme for code matrices. Real-, complex- and quaternion-valued code matrices are still being constructed in the respective domain. For that reason, we took an abstract point of view. That is, we do not consider a certain type of hypercomplex numbers. Instead, we do all computation in a real matrix-representation. Moreover, we show the basic conditions that have to be fulfilled so that generalized orthogonal hypercomplex codes exist.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130254078","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
Structured subchannel impulse response estimation for Filter Bank based Multicarrier systems 基于滤波器组的多载波系统的结构化子信道脉冲响应估计
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328356
L. Baltar, M. Newinger, J. Nossek
{"title":"Structured subchannel impulse response estimation for Filter Bank based Multicarrier systems","authors":"L. Baltar, M. Newinger, J. Nossek","doi":"10.1109/ISWCS.2012.6328356","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328356","url":null,"abstract":"In a Filter Bank based Multicarrier (FBMC) system employed in a highly frequency selective propagation channel each subchannel experiences a multi-tap impulse response (IR). In this contribution we present an efficient method of estimating the IR of the propagation channel experienced by each subchannel, the so-called structured channel estimation. The structured subchannel IR estimation allows us to isolate the propagation channel from the transmit and receive filters. As a consequence the number of parameters to be estimated is reduced as well as the length of the training sequence.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127299146","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: 20
Power allocation schemes for multichannel two-hop relaying systems 多通道二跳中继系统的功率分配方案
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328389
J. M. B. D. Silva, Y. Silva, T. Maciel, F. Cavalcanti, C. Rodrigues, Manoel Bezerra Campêlo Neto
{"title":"Power allocation schemes for multichannel two-hop relaying systems","authors":"J. M. B. D. Silva, Y. Silva, T. Maciel, F. Cavalcanti, C. Rodrigues, Manoel Bezerra Campêlo Neto","doi":"10.1109/ISWCS.2012.6328389","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328389","url":null,"abstract":"The usage of relays and OFDM can improve the performance of wireless systems in terms of data rates, coverage and reliability. In this paper we study joint subcarrier matching and power allocation for two-hop relay systems with the purpose of maximizing the total spectral efficiency. The problem is formulated as a mixed integer (binary) problem, but due to its complexity, the problem is separated into subcarrier matching and power allocation subproblems. Methods to solve both problems have been presented in previous works, but the solution to the power allocation problem still presented a high complexity. In this paper we demonstrate that the power allocation problem can be reformulated into a more tractable form, allowing us to develop suboptimal solutions based on water-filling with low computational cost. Numerical results show that the proposed suboptimal solutions are near-optimal and offer a good trade-off between performance and complexity.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129490132","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
Complementary Particle Swarm Antennas for next generation wireless communication systems 下一代无线通信系统的互补粒子群天线
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328497
A. A. Minasian, T. Bird
{"title":"Complementary Particle Swarm Antennas for next generation wireless communication systems","authors":"A. A. Minasian, T. Bird","doi":"10.1109/ISWCS.2012.6328497","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328497","url":null,"abstract":"A complementary Particle Swarm Antenna (PSA), which consists of an array of parasitically coupled microstrip patches, is presented for application in wireless communication systems. PSAs are characterised by their unique non intuitive designs which result from an application of Particle Swarm Optimisation (PSO) that does not implement constraints on the shape of the patch during the optimisation process only the domain outer dimension. An initial design is described for the IEEE 802.16 WiMAX 3.5 GHz band that achieves a reflection coefficient of <; -10 dB, an omnidirectional radiation pattern, low cross polarisation and good gain for potential application in wireless communication systems. The design was fabricated and experimental results obtained that confirm the simulations.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129057995","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
On the robustness of oversampled filter bank multi carrier systems against frequency offset 过采样滤波器组多载波系统对频偏的鲁棒性研究
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328507
Siavash Rahimi, B. Champagne
{"title":"On the robustness of oversampled filter bank multi carrier systems against frequency offset","authors":"Siavash Rahimi, B. Champagne","doi":"10.1109/ISWCS.2012.6328507","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328507","url":null,"abstract":"In this paper, we study the effect of oversampling in a perfect reconstruction (PR) filter bank multi carrier (FBMC) system recently proposed by the authors. Particularly, we investigate the performance of this system in the presence of carrier frequency offset (CFO). We show that the CFO introduces interference components in the receiver. By exploiting the statistical properties of the received subband signals, the average of the signal-to-interference ratio (SIR) is derived to exhibit the tradeoff between performance and efficiency. Furthermore, bit-error-rate (BER) comparisons of FBMC systems with different oversampling ratios over frequency-selective and additive white Gaussian noise (AWGN) channels in the presence of CFO are presented. These results confirm that oversampling increases robustness of the system against CFO.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"106 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120820800","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: 6
A fair MU-MIMO scheme for IEEE 802.11ac IEEE 802.11ac的一个公平的MU-MIMO方案
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328528
M. Esslaoui, F. Riera-Palou, G. Femenias
{"title":"A fair MU-MIMO scheme for IEEE 802.11ac","authors":"M. Esslaoui, F. Riera-Palou, G. Femenias","doi":"10.1109/ISWCS.2012.6328528","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328528","url":null,"abstract":"The next generation of wireless local area networks (WLANs), currently standardized within IEEE 802.11ac, will surely adopt multiuser multiple-input multiple-output (MU-MIMO) technology. This paper addresses the design of a multiuser proportional fair scheduling scheme, based on MU-MIMO orthogonal frequency division multiplexing (OFDM), that is able to schedule simultaneous transmissions to various users while providing a high degree of fairness. The proposed scheme is complemented by a fast link adaptation (FLA) strategy that, in light of the available channel state information (CSI), determines the most appropriate transmission parameters for each selected user. Simulation results generated using specifications envisaged for IEEE 802.11ac demonstrate the gains offered by the proposed technique with practical modulation and coding schemes.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121425333","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
QoS featured wireless virtualization based on 802.11 hardware QoS的特点是基于802.11硬件的无线虚拟化
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328478
Cong Wang, M. Zink
{"title":"QoS featured wireless virtualization based on 802.11 hardware","authors":"Cong Wang, M. Zink","doi":"10.1109/ISWCS.2012.6328478","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328478","url":null,"abstract":"Nowadays wireless network virtualization technique provides a practical perspective for splitting a single wireless network into multiple independent slices to support isolated virtual networks. A key problem for infrastructure providers is the fairness that needs to be provided among different virtual networks. In this paper, we provide a simplified method implemented by Click Modular router to take advantage of wireless virtualization and provide QoS featured airtime fairness for various services based on the application priorities of the users. Practical experiments show that our bandwidth shaping mechanism can provide more flexible resource allocation based on user needs and stable throughput guarantee for QoS featured services.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"263 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121444066","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 multiple cooperative nodes selection method for reliable wireless multi-hop data transmission 一种可靠无线多跳数据传输的多合作节点选择方法
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328415
Masaki Kubo, Ming Sun, K. Yanagihara, S. Hara
{"title":"A multiple cooperative nodes selection method for reliable wireless multi-hop data transmission","authors":"Masaki Kubo, Ming Sun, K. Yanagihara, S. Hara","doi":"10.1109/ISWCS.2012.6328415","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328415","url":null,"abstract":"We have reported that the use of cooperative nodes is effective for enhancing the reliability of data transmission between a source (S) and a destination (D) in a wireless multi-hop network by means of transmit diversity effect [1]. In the previous work, we have proposed two methods on cooperative node selection for each forwarding node over the route between S and D established by the Dynamic Source Routing (DSR) algorithm, but their application has been limited within the selection of just a single cooperative node for each forwarding node. Extension from single cooperative node selection to multiple cooperative nodes selection is not straightforward and requires a deep consideration, because when dealing with multiple cooperative nodes, we need to select and order adequate multiple cooperative nodes, and the selection and the ordering are related to each other. In this paper, we propose a multiple cooperative nodes selection method based on the criterion composed of the “quality” and “angle” metrics, which can select and order adequate cooperative nodes uniquely according to the criterion. Computer simulation results show that the proposed method can effectively reduce the packet error rate without any knowledge on the locations of nodes; as the number of cooperative nodes increases, the packet error rate is gradually improved, but the packet delay inevitably increases.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121599117","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
ALOHA and Q-Learning based medium access control for Wireless Sensor Networks 基于ALOHA和Q-Learning的无线传感器网络介质访问控制
2012 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2012-10-25 DOI: 10.1109/ISWCS.2012.6328420
Y. Chu, P. Mitchell, D. Grace
{"title":"ALOHA and Q-Learning based medium access control for Wireless Sensor Networks","authors":"Y. Chu, P. Mitchell, D. Grace","doi":"10.1109/ISWCS.2012.6328420","DOIUrl":"https://doi.org/10.1109/ISWCS.2012.6328420","url":null,"abstract":"This paper presents a novel Medium Access Control (MAC) protocol named ALOHA and Q-Learning based MAC with Informed Receiving (ALOHA-QIR) for Wireless Sensor Networks (WSNs). This scheme is implemented by combining frame based Slotted ALOHA and Q-Learning. ALOHA based schemes have the benefits of simplicity, low computation and overheads, but suffer collisions from the blind transmission strategy. By considering the previous transmission experience, Q-Learning offers nodes certain intelligence to access slots with a lower probability of collision. During data transmissions, receivers are informed by transmitters about their future slot selections so that the receivers can turn off their radio in other slots to save energy. Compared with basic Slotted ALOHA, ALOHA-QIR obtains significant improvements in throughput, delay and energy efficiency.","PeriodicalId":167119,"journal":{"name":"2012 International Symposium on Wireless Communication Systems (ISWCS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114253816","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: 64
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