2011 8th International Symposium on Wireless Communication Systems最新文献_第5页

Performance of OSTBC MIMO amplify-and-forward two-hop relay system with asymmetric channels 具有非对称信道的OSTBC MIMO放大转发两跳中继系统的性能

2011 8th International Symposium on Wireless Communication Systems Pub Date : 2011-11-01 DOI: 10.1109/ISWCS.2011.6125283

Nuwan S. Ferdinand, Nandana Rajatheva, M. Latva-aho

引用次数: 8

On the performance of spectrum sharing systems over α-µ fading channel for non-identical µ parameter 非相同微参数下α-微衰落信道频谱共享系统性能研究

2011 8th International Symposium on Wireless Communication Systems Pub Date : 2011-11-01 DOI: 10.1109/ISWCS.2011.6125405

Hung Tran, T. Duong, H. Zepernick

引用次数: 7

On network coding with finite channel state information 有限信道状态信息下的网络编码

2011 8th International Symposium on Wireless Communication Systems Pub Date : 2011-11-01 DOI: 10.1109/ISWCS.2011.6125407

Ming Xiao, M. Skoglund

{"title":"On network coding with finite channel state information","authors":"Ming Xiao, M. Skoglund","doi":"10.1109/ISWCS.2011.6125407","DOIUrl":"https://doi.org/10.1109/ISWCS.2011.6125407","url":null,"abstract":"We study network coding for wireless networks with finite channel state information (CSI) at intermediate nodes (relays). Based on the CSI of the relay-sink channels, we adapt the network codes at the relays. For a specific network with two sources, four relays and two sinks, the analytic results show that one bit CSI of all relay-sink channels (global CSI) can reduce complexity (field size), and simultaneously decrease the erasure probability. Then, we generalize the results to relay networks with M users, N relays and J sinks. We show that fixed network codes without CSI cannot achieve instantaneous min-cut, i.e., min-cut under current channel state. We also show that with one bit global CSI, we can achieve instantaneous min-cut by adapting the network codes using an alphabet size L, where L is the number of sinks connecting to a relay. Yet, the fixed MDS network codes use an alphabet size L(M−1N−1). For the networks with perfect or imperfect source-relay channels, adaptive network codes with one bit global CSI have lower erasure probability than the codes without CSI. Thus, one bit global CSI can reduce the erasure probability, and simultaneously reduce coding complexity.","PeriodicalId":414065,"journal":{"name":"2011 8th International Symposium on Wireless Communication Systems","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126461960","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

Primary user capacity maximization in cooperative detection network using m out of N fusion rule 基于m of N融合规则的协同检测网络主用户容量最大化

2011 8th International Symposium on Wireless Communication Systems Pub Date : 2011-11-01 DOI: 10.1109/ISWCS.2011.6125406

Vesh Raj S. Banjade, Nandana Rajatheva

{"title":"Primary user capacity maximization in cooperative detection network using m out of N fusion rule","authors":"Vesh Raj S. Banjade, Nandana Rajatheva","doi":"10.1109/ISWCS.2011.6125406","DOIUrl":"https://doi.org/10.1109/ISWCS.2011.6125406","url":null,"abstract":"Cooperative detection is a well accepted notion for alleviating the “hidden terminal problem” in cognitive radio (CR) networks. Furthermore, a number of CRs cooperating with each other significantly boosts the reliability of identification of any spectral opportunity. We consider a situation in which the primary user (PU) of the spectrum tries to communicate at a maximum possible rate with the primary receiver which could be a base station (BS) in presence of an N number of energy detector based CRs. Deploying the m out of N fusion rule at the BS, we formulate the problem of allocating the total PU power across its different transmission slots in a bid to maximize the PUBS capacity such that the fused probability of detection is lower bounded by a specific level guaranteeing a prescribed reliability of detection. The problem is shown to possess convexity and is solved to allocate the available PU transmission power optimally. Analysis of m out of N fusion rule on the PU capacity and on the fused detection probability is presented. The effect of time-bandwidth product of the energy detector on the system metrics is also analyzed.","PeriodicalId":414065,"journal":{"name":"2011 8th International Symposium on Wireless Communication Systems","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125898386","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

Iterative enhanced packet combining over hybrid-ARQ 基于混合arq的迭代增强分组合并

2011 8th International Symposium on Wireless Communication Systems Pub Date : 2011-11-01 DOI: 10.1109/ISWCS.2011.6125302

O. Rehman, N. Zivic, S. A. H. Tabatabaei

{"title":"Iterative enhanced packet combining over hybrid-ARQ","authors":"O. Rehman, N. Zivic, S. A. H. Tabatabaei","doi":"10.1109/ISWCS.2011.6125302","DOIUrl":"https://doi.org/10.1109/ISWCS.2011.6125302","url":null,"abstract":"Many widely used wireless networking protocols, such as WiMAX, UMTS and 3GPP Long Term Evolution use Hybrid ARQ for error control. H-ARQ improves the bit error rate performance and reduces the number of retransmissions. If the packet is in error even after forward error correction, then a retransmission request is made by the receiver. In order to reduce the retransmissions, different methods to combine the retransmitted erroneous packet(s) with the previous copies have been proposed earlier. In this paper, an enhanced packet combining method is presented that corrects both the even and odd errors in an erroneous packet by combining the current erroneous copy with the previous one and thereafter performing iterative decoding. The combining method uses both soft and hard information for better performance. A performance comparison is given with certain existing packet combining methods. The proposed method not only reduces the number of retransmissions, but also detects all the errors, with a high probability as given, if the number of errors remains within a certain threshold. The probability of the success of packet recovery for the proposed method is presented. Finally, simulation results for bit error rate, packet acceptance rate and retransmission rates for different packet sizes are presented for comparison.","PeriodicalId":414065,"journal":{"name":"2011 8th International Symposium on Wireless Communication Systems","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128475670","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

On pilot design for interference limited OFDM systems 限制干扰OFDM系统的导频设计

2011 8th International Symposium on Wireless Communication Systems Pub Date : 2011-11-01 DOI: 10.1109/ISWCS.2011.6125413

P. Karunakaran, P. Suryasarman, Vinod Ramaswamy, K. Kuchi, Deviraj Klutto Milleth Jeniston, B. Ramamurthi

{"title":"On pilot design for interference limited OFDM systems","authors":"P. Karunakaran, P. Suryasarman, Vinod Ramaswamy, K. Kuchi, Deviraj Klutto Milleth Jeniston, B. Ramamurthi","doi":"10.1109/ISWCS.2011.6125413","DOIUrl":"https://doi.org/10.1109/ISWCS.2011.6125413","url":null,"abstract":"Modern cellular networks are inherently interference limited, and therefore, pilot design is extremely important to the overall system performance. The pilots have to be carefully arranged and modulated to track the fading channel as well as to suppress the interference efficiently. 4G wireless systems based on OFDMA use pilot design strategies that can be classified as ‘Data on Pilot’ and ‘Pilot on Pilot’. In this paper, a ‘Null on Pilot’ scheme that uses null tones and pilot tones to avoid most of the interference on the pilots is considered. Various design aspects of these three pilot schemes are discussed in detail. The channel estimation, interference covariance estimation, link performance with different interference profiles, and system throughput are analyzed and compared with these pilot schemes. It is shown that the popular approach of ‘Data on Pilot’ scheme is inferior to the other two approaches in exploiting the post-processing SNR gain of MMSE interference suppression receivers. The performances of ‘Null on Pilot’ and ‘Pilot on Pilot’ are quite similar.","PeriodicalId":414065,"journal":{"name":"2011 8th International Symposium on Wireless Communication Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128484457","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

On dispersion of modulo lattice additive noise channels 模晶格加性噪声信道的色散

2011 8th International Symposium on Wireless Communication Systems Pub Date : 2011-11-01 DOI: 10.1109/ISWCS.2011.6125346

Jinjing Jiang, Tie Liu

引用次数: 3

Optimal power allocation under QoS constraints in cognitive radio systems 认知无线电系统QoS约束下的最优功率分配

2011 8th International Symposium on Wireless Communication Systems Pub Date : 2011-11-01 DOI: 10.1109/ISWCS.2011.6125418

S. Vassaki, M. Poulakis, A. Panagopoulos, P. Constantinou

引用次数: 12

On the delay and energy performance in coded two-hop line networks with bursty erasures 具有突发擦除的编码两跳网络的时延和能量性能

2011 8th International Symposium on Wireless Communication Systems Pub Date : 2011-11-01 DOI: 10.1109/ISWCS.2011.6125410

D. Lucani, J. Kliewer

引用次数: 8

Dimensionality reduction for the golden code with worst-case decoding complexity of O(m2) 最坏情况译码复杂度为0 (m2)的黄金码降维

2011 8th International Symposium on Wireless Communication Systems Pub Date : 2011-11-01 DOI: 10.1109/ISWCS.2011.6125384

S. Kahraman, M. Çelebi

引用次数: 12