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2012 26th Biennial Symposium on Communications (QBSC)最新文献

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A capacity-complexity trade-off for CDMA with multi-user demodulation 多用户解调CDMA的容量复杂度权衡
2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221380
Yi Feng, J. Bajcsy
{"title":"A capacity-complexity trade-off for CDMA with multi-user demodulation","authors":"Yi Feng, J. Bajcsy","doi":"10.1109/QBSC.2012.6221380","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221380","url":null,"abstract":"Multi-user demodulation and decoding (MUD) can offer significant improvements in performance of CDMA systems, but their limited practical use is due to the large computational complexity. In this paper, we perform the capacity evaluation for MUD with non-uniform chip-level signaling and observe that MUD complexity can be greatly reduced by trading-off some proportion of the full MUD channel capacity. This trade-off between the MUD channel capacity and the MUD complexity can be used to improve performance of CDMA systems. Consequently, we present simulation results illustrating that by selecting appropriate non-uniform chip probabilities, our considered CDMA system can achieve a good throughput and great reduction in multi-user interference and MUD implementation complexity.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"59 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133486752","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
Robust detector for amplify-and-forward with noncoherent frequency-shift keying 非相干频移键控放大前向鲁棒检测器
2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221351
Peng Liu, S. Gazor, Il Kim, Dong In Kim
{"title":"Robust detector for amplify-and-forward with noncoherent frequency-shift keying","authors":"Peng Liu, S. Gazor, Il Kim, Dong In Kim","doi":"10.1109/QBSC.2012.6221351","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221351","url":null,"abstract":"In this paper, we develop a simple closed-form generalized likelihood ratio test (GLRT) detector for a multi-relay amplify-and-forward (AF) cooperative network employing noncoherent M-ary frequency-shift keying (M-FSK). The proposed detector is robust in the sense that it does not require any prior knowledge about the channels such as the variance of the additive white Gaussian noise, the fading model, and the channel statistics. To analytically evaluate the proposed detector, focusing on the single-relay case with a direct source-destination link, we derive an exact expression of the bit-error rate (BER) for binary FSK in Rayleigh fading. Finally, simulation results demonstrate the robustness of the proposed detector.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123978614","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
Outage probability of rateless codes in memoryless erasure channels 无内存擦除信道中无速率码的中断概率
2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221371
A. Bakhshali, W. Chan, Yu Cao, S. Blostein
{"title":"Outage probability of rateless codes in memoryless erasure channels","authors":"A. Bakhshali, W. Chan, Yu Cao, S. Blostein","doi":"10.1109/QBSC.2012.6221371","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221371","url":null,"abstract":"In this paper, we investigate the outage probability in decoding the rateless codes when a certain amount fountain encoded symbols are generated, and then transmitted through a memoryless erasure channel (MEC). We obtain a closed-form formula for the outage probability by accounting for the complete effect of the channel on the distribution of the received symbols. Moreover, a new model with high accuracy is proposed. The proposed model has a negligible complexity compared to the existing models and can be easily adapted in cross-layer optimizations due to its simple structure. Performance of the existing models, as well as the proposed one, are quantitatively compared using min-squared-error (MSE) and Pearson-correlation (PC).","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125255175","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
Proactive repair redundancy algorithms for distributed storage in P2P networks P2P网络中分布式存储的主动修复冗余算法
2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221352
O. Herrera, T. Znati
{"title":"Proactive repair redundancy algorithms for distributed storage in P2P networks","authors":"O. Herrera, T. Znati","doi":"10.1109/QBSC.2012.6221352","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221352","url":null,"abstract":"Distributed storage systems frequently use erasure coding based redundancy or replication to improve availability. Traditional erasure coding based approaches to redundancy are optimal in terms of their storage overhead-reliability tradeoff, but are expensive to repair. In this paper, we propose Proactive Repair (PR), a novel hybrid redundancy scheme. We discuss the implementation of the proposed scheme and discuss an emulated-based experimental study to evaluate PR's performance. The results show that PR outperforms exact-repair Minimum Bandwidth Regenerating (exact-MBR) network coding in terms of complexity and repair traffic overhead. Content availability when the system uses PR exhibits higher ability to dynamically adapt to changing failures rates, caused by nodes leaving the network.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134304611","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
TS-LDPC analog decoding based on the Min-Sum algorithm 基于最小和算法的TS-LDPC模拟解码
2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221374
A. R. Abolfazli, Y. Shayan, G. Cowan
{"title":"TS-LDPC analog decoding based on the Min-Sum algorithm","authors":"A. R. Abolfazli, Y. Shayan, G. Cowan","doi":"10.1109/QBSC.2012.6221374","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221374","url":null,"abstract":"It has been shown that Min-Sum (MS) algorithms have low complexity in the implementation of analog VLSI decoders compared to the Sum-Product (SP) algorithm. Moreover, Turbo-structured LDPC (TS-LDPC) codes are known to have lower error floor than random LDPC codes. In this paper, Min-Sum and Min-Sum with correction factor algorithms are reviewed and adapted with TS-LDPC codes for future analog VLSI implementation. Simulation results show that the error performance of the Min-Sum algorithm is comparable with the Sum-Product algorithm for the same block length. This means that the lower error floor property of TS-LDPC codes is preserved when MS algorithms are used. Moreover, analog decoder implementation of TS-LDPC codes is studied. To test the suitability of the MS algorithm based TS-LDPC decoder some analog impairments such as mismatch, leakage and noise are considered in the decoding procedure of TS-LDPC codes. In each case, it is shown that the degradation of the error performance of TS-LDPC codes due to analog impairments is negligible. Therefore, it can be concluded that the analog decoder of the TS-LDPC code using MS algorithm is fairly robust against analog imperfections and may be considered in future implementation of analog VLSI decoder.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134376758","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
Link adaptation-based optimization for wireless sensor networks routing protocol 基于链路自适应的无线传感器网络路由协议优化
2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221369
A. Chehri, H. Mouftah
{"title":"Link adaptation-based optimization for wireless sensor networks routing protocol","authors":"A. Chehri, H. Mouftah","doi":"10.1109/QBSC.2012.6221369","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221369","url":null,"abstract":"Wireless sensor networks (WSN) are one of most interesting emerging technologies. WSN can be used to perform monitoring, surveillance, sensing and measuring operations. In order to further increase these applications, minimizing energy consumption is one of the most critical issues. Therefore, accurate energy model is required for the evaluation of wireless sensor networks performance. In this paper, the energy consumption over a link is analyzed. The optimization mechanism is subject of certain QoS requirement in term of total end-to end delay time and bit error rate. The simulation results show that the proposed algorithm can reduce the consumed energy of the sensor nodes.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123608448","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
Consensus-based local control schemes for spectrum sharing in cognitive radio sensor networks 认知无线电传感器网络中基于共识的频谱共享局部控制方案
2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221363
Peng Hu, M. Ibnkahla
{"title":"Consensus-based local control schemes for spectrum sharing in cognitive radio sensor networks","authors":"Peng Hu, M. Ibnkahla","doi":"10.1109/QBSC.2012.6221363","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221363","url":null,"abstract":"Spectrum sharing is an important topic in cognitive radio sensor networks (CRSNs). Bio-inspired consensus-based schemes can provide lightweight and efficient solutions to ensure spectrum sharing fairness in CRSNs. In this paper, in order to achieve the defined spectrum sharing fairness, we propose two schemes called the local control scheme for unbiased fairness (LCS-UF) and the local control scheme for max-min fairness (LCS-MMF). With the local observation and control using surrounding spectrum-related information, an individual cognitive sensor node can effectively perform the spectrum sharing with LCS-UF and LCS-MMF. From simulation results, the use of proposed schemes shows low complexity and effectiveness for spectrum sharing processes in randomly deployed CRSNs.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116784267","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
Capacity versus interference in OFDM-based cognitive radio systems with beacon 基于ofdm的信标认知无线电系统的容量与干扰
2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221355
F. Shayegh, M. Soleymani
{"title":"Capacity versus interference in OFDM-based cognitive radio systems with beacon","authors":"F. Shayegh, M. Soleymani","doi":"10.1109/QBSC.2012.6221355","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221355","url":null,"abstract":"We consider an OFDM-based cognitive radio network where a secondary user chooses parallel sub-channels from different primary users' bands to form its transmission link. It transmits one OFDM subcarrier per each sub-channel. Before starting its transmission, a primary user sends a beacon to inform the secondary user. If the secondary user receives this message, it does not use any sub-channel from that primary user band for its transmission in order to limit the interference to the primary receiver. However, it is possible that the secondary user misses the beacon of a primary user because of the channel fading and hence, considers the sub-channels of that primary user for its transmission. We are interested in the total interference caused by the secondary user to primary users' receivers and the total capacity of the secondary user. In particular, we provide the average of total interference as well as an analytical lower bound on the mean of the capacity. The trade-off between the capacity and the interference is useful in the design of an OFDM-based cognitive network with beacon.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130397529","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
Dynamic multi-band allocation scheme for a stand-alone wireless access point 用于独立无线接入点的动态多频段分配方案
2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221375
O. Abu-Sharkh, A. Al-Hamad, T. M. Abdelrahim, M. Akour
{"title":"Dynamic multi-band allocation scheme for a stand-alone wireless access point","authors":"O. Abu-Sharkh, A. Al-Hamad, T. M. Abdelrahim, M. Akour","doi":"10.1109/QBSC.2012.6221375","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221375","url":null,"abstract":"The most popular wireless LAN standards; IEEE802.11b [1] and IEEE802.11g [2] operates using the 2.4 GHz band. There are only three non-overlapping channels that can be used without interference for wireless LANs. Therefore, congestion is very high especially with the increasing use of similar and other wireless technologies in this band. The IEEE802.11n [3] standard operates using both the 2.4GHz and the less congested 5GHz frequency band. Some of the deficiencies of using the 5GHz are penetration issues and coverage area. In this paper, we propose a multi-band scheme that is capable of dynamically switches between the 2.4GHz and the 5GHz frequency bands based on the operating environment. The metric we use in the switching operation is the Received Signal Strength Indication (RSSI). We validate our work by real implementations and experiments. The scheme is built on the open source TomatoUSB [4] firmware.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125866433","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
Outage capacity regions of multicarrier DF relaying in underwater acoustic channels 水声信道中多载波DF中继的中断容量区域
2012 26th Biennial Symposium on Communications (QBSC) Pub Date : 2012-05-28 DOI: 10.1109/QBSC.2012.6221345
S. Al-Dharrab, M. Uysal
{"title":"Outage capacity regions of multicarrier DF relaying in underwater acoustic channels","authors":"S. Al-Dharrab, M. Uysal","doi":"10.1109/QBSC.2012.6221345","DOIUrl":"https://doi.org/10.1109/QBSC.2012.6221345","url":null,"abstract":"In this paper, we investigate the information theoretical limits on the performance of cooperative multicarrier underwater acoustic (UWA) communication systems. We assume decode-and-forward (DF) relaying and consider non-orthogonal half-duplex cooperation. Under the assumptions of sparse and frequency-selective Rician fading channel and correlated Gaussian ambient noise, we derive the maximum achievable sum-rate and common/individual outage capacity regions for the cooperation protocol under consideration. We further investigate the effect of several parameters such as underwater temperature, carrier frequency, etc. on the outage capacity regions.","PeriodicalId":343966,"journal":{"name":"2012 26th Biennial Symposium on Communications (QBSC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128848226","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
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