2014 Wireless Telecommunications Symposium最新文献_第5页

Effect of RF impairments on spectrum sensing techniques 射频损伤对频谱传感技术的影响

2014 Wireless Telecommunications Symposium Pub Date : 2014-04-09 DOI: 10.1109/WTS.2014.6835002

Mohammad H. Haroun, Hussein Kobeissi, O. Bazzi, Haidar El-Mokdad, L. Safatly, K. Kabalan, Y. Nasser

引用次数: 2

Achieving guaranteed connected coverage by using virtual hexagonal partition in wireless sensor networks 在无线传感器网络中利用虚拟六角形分区实现有保证的连接覆盖

2014 Wireless Telecommunications Symposium Pub Date : 2014-04-09 DOI: 10.1109/WTS.2014.6835030

Attapol Adulyasas, Zhili Sun, Ning Wang

引用次数: 3

Bayesian quantized network coding via generalized approximate message passing 基于广义近似消息传递的贝叶斯量化网络编码

2014 Wireless Telecommunications Symposium Pub Date : 2014-04-09 DOI: 10.1109/WTS.2014.6834995

M. Nabaee, F. Labeau

引用次数: 6

Performance analysis of AF cooperative networks with time-varying links: Outage probability 时变链路AF协同网络性能分析:中断概率

2014 Wireless Telecommunications Symposium Pub Date : 2014-04-09 DOI: 10.1109/WTS.2014.6835010

Yazid M. Khattabi, M. Matalgah

{"title":"Performance analysis of AF cooperative networks with time-varying links: Outage probability","authors":"Yazid M. Khattabi, M. Matalgah","doi":"10.1109/WTS.2014.6835010","DOIUrl":"https://doi.org/10.1109/WTS.2014.6835010","url":null,"abstract":"In this paper, we consider an M-relay amplify-and-forward (AF) cooperative system with maximal ratio combining (MRC) at the destination and investigate the effects of both the mobile cooperating-nodes speeds and the receivers' channel state information (CSI) estimation rates on the system outage performance. By CSI estimation rates we mean how much the receivers' tracking loops are fast to estimate the channel gains over the individual time slots. The fading links are considered to be frequency-flat time-varying Rayleigh fading and modeled by a first-order autoregressive process (AR1). General closed-form approximate expression is derived for the outage probability, which is further verified through Monte Carlo simulation. The derived expression is valid for time-varying as well as quasi-static fading links for both low and high CSI estimation rates. Furthermore, we analytically show that, due to high speeds of the cooperating-nodes, the outage probability experiences asymptotic floor which could be completely eliminated by well-designed fast tracking loops at the receivers. This outage performance is also investigated under different nodes mobility scenarios.","PeriodicalId":199195,"journal":{"name":"2014 Wireless Telecommunications Symposium","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127785801","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

On optimizing the performance of interference-limited cellular systems 有限干扰蜂窝系统性能优化研究

2014 Wireless Telecommunications Symposium Pub Date : 2014-04-09 DOI: 10.1109/WTS.2014.6834999

Rana A. Abdelaal, A. S. Behbahani, A. Eltawil

引用次数: 2

Analysis and comparison of Fractional Frequency Reuse schemes based on worst case Signal to Interference power Ratio in OFDMA uplink 基于最坏情况下OFDMA上行信干扰功率比的分数频率复用方案分析与比较

2014 Wireless Telecommunications Symposium Pub Date : 2014-04-09 DOI: 10.1109/WTS.2014.6835023

S. Hashima, O. Muta, S. Elnoubi, M. Alghoniemy, H. Shalaby, H. Furukawa, I. Mahmoud

{"title":"Analysis and comparison of Fractional Frequency Reuse schemes based on worst case Signal to Interference power Ratio in OFDMA uplink","authors":"S. Hashima, O. Muta, S. Elnoubi, M. Alghoniemy, H. Shalaby, H. Furukawa, I. Mahmoud","doi":"10.1109/WTS.2014.6835023","DOIUrl":"https://doi.org/10.1109/WTS.2014.6835023","url":null,"abstract":"Fractional Frequency Reuse (FFR) is an efficient interference mitigation technique for modern cellular networks due to its low complexity, low coordination requirements and resource allocation flexibility. This work considers the use of FFR in the cellular uplink (UL). We analyze the uplink worst case Signal to Interference power Ratio (SIR) for sectored FFR and compare its results with those of strict FFR and Soft FFR. A closed form expression is derived analytically for worst SIR and best inner radius. This analytical technique is utilized to configure a FFR solution for the TIL of Orthogonal Frequency Division Multiple Access (OFDMA) cellular systems. The analysis is performed using two-tiers cellular network with uniform user density and for three different cases of FFR, sectored FFR, Soft Frequency Reuse (SFR), and strict FFR with Frequency Reuse Factor (FRF)= 3 and FRF= 4. Also the effect of power control exponent on those FFR schemes is studied. The inner radius configuration depends on equalizing the worst SIR for both inner and outer edges of the cell. Numerical results show that sectored FFR without power control yields the highest SIR followed by strict FFR with FRF= 4. Power control exponent does not affect FFR with reuse three but strongly affects SFR and FRF= 4 as its increase reduces its SIR and inner radius. Sectored FFR without power control have the highest SE, hence sectored FFR highly balances the needs of interference reduction and resource efficiency but at the expense of increased system complexity.","PeriodicalId":199195,"journal":{"name":"2014 Wireless Telecommunications Symposium","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133852965","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

HPA nonlinearities mitigation by joint predistorter and constellation rotation using MIMO communication systems 基于联合预失真器和星座旋转的MIMO通信系统HPA非线性缓解

2014 Wireless Telecommunications Symposium Pub Date : 2014-04-09 DOI: 10.1109/WTS.2014.6835026

Latif Jan, H. Zafar, Ishtiaq Ahmed, M. I. Babar, S. Mahmud, G. M. Khan, Syed Amir Gilani

{"title":"HPA nonlinearities mitigation by joint predistorter and constellation rotation using MIMO communication systems","authors":"Latif Jan, H. Zafar, Ishtiaq Ahmed, M. I. Babar, S. Mahmud, G. M. Khan, Syed Amir Gilani","doi":"10.1109/WTS.2014.6835026","DOIUrl":"https://doi.org/10.1109/WTS.2014.6835026","url":null,"abstract":"Nonlinearities in wireless communication channels foil the performance of the communication systems either at the transmitter or receiver end. This paper explains the concept of the transmitter-side nonlinearities that are induced by the High Power Amplifiers (HPA), the final stage at the transmitter side of the communication system. HPA nonlinearities create in-band and out-of-band distortions in wireless communication systems. The in-band distortion results in the degradation of overall performance of Bit Error Rate (BER) and the capacity of the mobile operations. On the other hand, out-of-band distortion creates the spectral broadening effects that degrade the performance of other operators usually operate in the near bands. This paper presents a novel method for the mitigation of HPA nonlinearities by joint predistorter and constellation rotation in Multiple-Input Multiple-Output (MIMO) wireless communication systems. The results reveal that the joint nonlinearity compensation technique in MIMO communications system enhances the overall error rate performance of the system. Furthermore to exploit the benefits of proposed technique; Symbol Error Rate (SER) curves for the MIMO multiplexing and Alamouti Space Time Block Codes (STBC) are presented with improvements in their signal to noise ratio.","PeriodicalId":199195,"journal":{"name":"2014 Wireless Telecommunications Symposium","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126771107","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 feasibility of generalized Interference Alignment with Partial Interference Cancelation 部分干涉抵消广义干涉对准的可行性

2014 Wireless Telecommunications Symposium Pub Date : 2012-10-25 DOI: 10.1109/WTS.2014.6835031

Xinya Tu, Zhi Chen, Jun Fang, Lingxiang Li, B. Qu, Bin Fu

引用次数: 2