Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343277
Mohammed Almoneer, C. Rohde, K. Hassan, W. Gerstacker
Linear pilot-aided channel estimation in orthogonal-frequency division multiplexing (OFDM) systems is carried out optimally via 2D Wiener filters. The standard approach employed in conventional receivers is based on cascaded 2×1D Wiener filtering, which has a lower complexity but also suboptimal performance. The 2D+1D filtering scheme proposed in this paper combines the benefits of the two other schemes and is not affected by some restrictions of 2×1D filtering as shown by theoretical analysis of such schemes. For comparison, the mean-squared error (MSE) performance of the different channel estimation schemes is evaluated. Based on this analysis, results from full link-level simulations w.r.t. the digital video broadcasting standard for satellite services to handheld devices (DVB-SH) are presented applying adaptive channel estimation algorithms instead of the Wiener filters. The novel 2D+1D scheme shows enhanced bit error rate (BER) performance since it provides more accurate channel estimates in high Doppler channel conditions compared to the conventional cascaded 2×1D schemes.
{"title":"Robust 2D+1D adaptive channel estimation scheme in OFDM systems","authors":"Mohammed Almoneer, C. Rohde, K. Hassan, W. Gerstacker","doi":"10.1109/PIMRC.2015.7343277","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343277","url":null,"abstract":"Linear pilot-aided channel estimation in orthogonal-frequency division multiplexing (OFDM) systems is carried out optimally via 2D Wiener filters. The standard approach employed in conventional receivers is based on cascaded 2×1D Wiener filtering, which has a lower complexity but also suboptimal performance. The 2D+1D filtering scheme proposed in this paper combines the benefits of the two other schemes and is not affected by some restrictions of 2×1D filtering as shown by theoretical analysis of such schemes. For comparison, the mean-squared error (MSE) performance of the different channel estimation schemes is evaluated. Based on this analysis, results from full link-level simulations w.r.t. the digital video broadcasting standard for satellite services to handheld devices (DVB-SH) are presented applying adaptive channel estimation algorithms instead of the Wiener filters. The novel 2D+1D scheme shows enhanced bit error rate (BER) performance since it provides more accurate channel estimates in high Doppler channel conditions compared to the conventional cascaded 2×1D schemes.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114724706","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343523
Xiang Wang, Wenjun Xu, Shengyu Li, Jiaru Lin
In this paper, we focus on whether and how the quality-of-service (QoS) requirements can be guaranteed in radio frequency (RF)-harvesting-powered cognitive orthogonal frequency division multiplexing (OFDM) relay systems, where the available energy is extremely limited by power transfer capability, and the available spectrum is greatly restricted by primary networks. Thus, the joint power splitting ratio, subcarrier assignment and power allocation problem is formulated under the interference constraints and QoS requirements. In addition, in order to maximize the capacity of the secondary network, an optimal power splitting and resource allocation scheme is proposed based on dual decomposition as well as time sharing conditions. Simulation results show that the proposed scheme can perfectly satisfy the QoS requirements in spite of limited energy and spectrum, and outperforms conventional methods in terms of capacity and QoS satisfaction.
{"title":"Joint power splitting and resource allocation with QoS guarantees in RF-harvesting-powered cognitive OFDM relay systems","authors":"Xiang Wang, Wenjun Xu, Shengyu Li, Jiaru Lin","doi":"10.1109/PIMRC.2015.7343523","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343523","url":null,"abstract":"In this paper, we focus on whether and how the quality-of-service (QoS) requirements can be guaranteed in radio frequency (RF)-harvesting-powered cognitive orthogonal frequency division multiplexing (OFDM) relay systems, where the available energy is extremely limited by power transfer capability, and the available spectrum is greatly restricted by primary networks. Thus, the joint power splitting ratio, subcarrier assignment and power allocation problem is formulated under the interference constraints and QoS requirements. In addition, in order to maximize the capacity of the secondary network, an optimal power splitting and resource allocation scheme is proposed based on dual decomposition as well as time sharing conditions. Simulation results show that the proposed scheme can perfectly satisfy the QoS requirements in spite of limited energy and spectrum, and outperforms conventional methods in terms of capacity and QoS satisfaction.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116763802","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343513
N. Shibata, K. Miyamoto, S. Kuwano, J. Terada, A. Otaka
In this paper, the system level performance of uplink transmission in the split-PHY processing (SPP) architecture is evaluated. The SPP architecture splits the PHY functions of the base station so that some PHY functions are implemented on the remote radio head (RRH). Compared to the centralized radio access network (C-RAN) architecture with common public radio interface (CPRI), the SPP architecture significantly reduces the required optical bandwidth in the mobile front-haul. Moreover, by implementing the FEC processing in the baseband unit (BBU), joint reception can be realized in uplink transmissions by forwarding the quantized log likelihood ratio (LLR) from RRHs to the BBU. System level evaluations show that the SPP architecture improves the cell-edge user throughput by 116 % compared with the MAC-PHY split architecture without coordinated operations while reducing the required optical bandwidth by 92 % compared with the C-RAN architecture.
{"title":"System level performance of uplink transmission in split-PHY processing architecture with joint reception for future radio access","authors":"N. Shibata, K. Miyamoto, S. Kuwano, J. Terada, A. Otaka","doi":"10.1109/PIMRC.2015.7343513","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343513","url":null,"abstract":"In this paper, the system level performance of uplink transmission in the split-PHY processing (SPP) architecture is evaluated. The SPP architecture splits the PHY functions of the base station so that some PHY functions are implemented on the remote radio head (RRH). Compared to the centralized radio access network (C-RAN) architecture with common public radio interface (CPRI), the SPP architecture significantly reduces the required optical bandwidth in the mobile front-haul. Moreover, by implementing the FEC processing in the baseband unit (BBU), joint reception can be realized in uplink transmissions by forwarding the quantized log likelihood ratio (LLR) from RRHs to the BBU. System level evaluations show that the SPP architecture improves the cell-edge user throughput by 116 % compared with the MAC-PHY split architecture without coordinated operations while reducing the required optical bandwidth by 92 % compared with the C-RAN architecture.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114983140","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343325
Younes Abdi, T. Ristaniemi
Interrupted reporting has recently been introduced as an effective method to increase the energy efficiency of cooperative spectrum sensing schemes in cognitive radio networks. In this paper, joint optimization of the reporting and fusion phases in a cooperative sensing with interrupted reporting is considered. This optimization aims at finding the best weights used at the fusion center to construct a linear fusion of the received interrupted reports, jointly with Bernoulli distributions governing the statistical behavior of the interruptions. The problem is formulated by using the deflection criterion and as a nonconvex quadratic program which is then solved for a suboptimal solution, in a computationally-affordable fashion, by a semidefinite relaxation technique. The system performance is then demonstrated by a set of numerical results which compare the performance of the system for the cases with and without the optimal linear fusion.
{"title":"Linear fusion of interrupted reports in cooperative spectrum sensing for cognitive radio networks","authors":"Younes Abdi, T. Ristaniemi","doi":"10.1109/PIMRC.2015.7343325","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343325","url":null,"abstract":"Interrupted reporting has recently been introduced as an effective method to increase the energy efficiency of cooperative spectrum sensing schemes in cognitive radio networks. In this paper, joint optimization of the reporting and fusion phases in a cooperative sensing with interrupted reporting is considered. This optimization aims at finding the best weights used at the fusion center to construct a linear fusion of the received interrupted reports, jointly with Bernoulli distributions governing the statistical behavior of the interruptions. The problem is formulated by using the deflection criterion and as a nonconvex quadratic program which is then solved for a suboptimal solution, in a computationally-affordable fashion, by a semidefinite relaxation technique. The system performance is then demonstrated by a set of numerical results which compare the performance of the system for the cases with and without the optimal linear fusion.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122986763","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343319
Yi Wang, Wenting Song, Yongming Huang, Chunguo Li, Shidang Li, Luxi Yang
This paper considers a downlink massive MIMO frequency division duplexing (FDD) system. Due to the large number of antennas, the required length of training sequence for downlink training significantly increases in FDD mode, which leads to prohibitive overhead in real system. Thus, in this work we investigate how the length of training sequence affects the system performance. For this purpose, we derive an analytical expression of the ergodic achievable rate from a worst case viewpoint with the the training sequence length as a parameter in it. It is revealed from the analytical results that i.) the length of training sequence divided by the number of base station antennas approaches to zero yet the achievable rate can increase to infinity as long as the antenna number is sufficient large; ii.) there is a ceiling effect on the achievable rate if the antenna number grows large with any fixed training length. Furthermore, we propose a guideline for the selection of the training length. Numerical results validate the derivations and analysis.
{"title":"Effects of the length of training sequence on the achievable rate in FDD massive MIMO system","authors":"Yi Wang, Wenting Song, Yongming Huang, Chunguo Li, Shidang Li, Luxi Yang","doi":"10.1109/PIMRC.2015.7343319","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343319","url":null,"abstract":"This paper considers a downlink massive MIMO frequency division duplexing (FDD) system. Due to the large number of antennas, the required length of training sequence for downlink training significantly increases in FDD mode, which leads to prohibitive overhead in real system. Thus, in this work we investigate how the length of training sequence affects the system performance. For this purpose, we derive an analytical expression of the ergodic achievable rate from a worst case viewpoint with the the training sequence length as a parameter in it. It is revealed from the analytical results that i.) the length of training sequence divided by the number of base station antennas approaches to zero yet the achievable rate can increase to infinity as long as the antenna number is sufficient large; ii.) there is a ceiling effect on the achievable rate if the antenna number grows large with any fixed training length. Furthermore, we propose a guideline for the selection of the training length. Numerical results validate the derivations and analysis.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121599689","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}
Two-path cancellation schemes have attracted much attention due to its effectiveness in suppressing intercarrier interference (ICI) in orthogonal frequency division multiplexing (OFDM) systems. In this paper, we derive the exact closed-form expressions of the signal-to-interference-plus-noise ratio for two-path cancellation schemes in multipath fading channels as well as their upper bounds, which are much simpler to formulate yet tight enough to provide useful insight. By properly approximating the residual ICI as Gaussian process, we further derive the closed-form expressions of bit error rate (BER) for an uncoded OFDM system with QPSK modulation in multipath fading channels. More importantly, the derived BER expressions take into account the important phase rotation effect. Monte-Carlo simulations are conducted to validate our analyses and derivations.
{"title":"Performance analysis of two-path transmission technique for intercarrier interference cancellation in OFDM systems","authors":"Weiqiang Pan, Yingzheng Han, Guoqiang Deng, Peijun Zhong","doi":"10.1109/PIMRC.2015.7343268","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343268","url":null,"abstract":"Two-path cancellation schemes have attracted much attention due to its effectiveness in suppressing intercarrier interference (ICI) in orthogonal frequency division multiplexing (OFDM) systems. In this paper, we derive the exact closed-form expressions of the signal-to-interference-plus-noise ratio for two-path cancellation schemes in multipath fading channels as well as their upper bounds, which are much simpler to formulate yet tight enough to provide useful insight. By properly approximating the residual ICI as Gaussian process, we further derive the closed-form expressions of bit error rate (BER) for an uncoded OFDM system with QPSK modulation in multipath fading channels. More importantly, the derived BER expressions take into account the important phase rotation effect. Monte-Carlo simulations are conducted to validate our analyses and derivations.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123853861","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343567
Kohta Nakamura, T. Tashiro, Keiji Yamamoto, Kenichi Ohno
Interference avoidance between macro and femto cells is necessary in heterogeneous network (HetNet) systems. To solve the issues, we proposed a method that controls not only transmit power but also channel assignment by genetic algorithm. In this paper, we optimize parameters in indoor environment under the constraint from interference from macro networks and evaluate the throughput performance in HetNet Systems by simulation. We also evaluate the calculation time of parameters on the control board as the integrated device. We confirmed the increase of the minimum throughput and the average throughput with less complexity by controlling parameters, comparing with the throughput and calculation time by a method without controlling parameters.
{"title":"Transmit power control and channel assignment for femto cells in HetNet systems using genetic algorithm","authors":"Kohta Nakamura, T. Tashiro, Keiji Yamamoto, Kenichi Ohno","doi":"10.1109/PIMRC.2015.7343567","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343567","url":null,"abstract":"Interference avoidance between macro and femto cells is necessary in heterogeneous network (HetNet) systems. To solve the issues, we proposed a method that controls not only transmit power but also channel assignment by genetic algorithm. In this paper, we optimize parameters in indoor environment under the constraint from interference from macro networks and evaluate the throughput performance in HetNet Systems by simulation. We also evaluate the calculation time of parameters on the control board as the integrated device. We confirmed the increase of the minimum throughput and the average throughput with less complexity by controlling parameters, comparing with the throughput and calculation time by a method without controlling parameters.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115833479","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343600
Sébastien Auroux, H. Karl
The growing number of network mechanisms results in a large amount of data flow processing to be performed in future wireless access networks. Determining suitable locations for data processing in a network is important for a good network performance but also a non-trivial task as data processing imposes many requirements on network resources. Further, data flows and network load generally change over time, possibly very quickly, so that a static, one-time placement is not an adequate solution. Hence, a framework that determines these locations should also flexibly reassign them over time. We address this need by a flexible flow processing-aware controller placement framework (FlexFCPF), which places and flexibly reassigns controller devices that are able to perform both network control (conventional SDN) and data flow processing for an efficient management of future wireless networks. We have developed and implemented a fast heuristic framework and we prove its efficiency by providing evaluation results of FlexFCPF's performance in a dynamic network simulation.
{"title":"Flexible reassignment of flow processing-aware controllers in future wireless networks","authors":"Sébastien Auroux, H. Karl","doi":"10.1109/PIMRC.2015.7343600","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343600","url":null,"abstract":"The growing number of network mechanisms results in a large amount of data flow processing to be performed in future wireless access networks. Determining suitable locations for data processing in a network is important for a good network performance but also a non-trivial task as data processing imposes many requirements on network resources. Further, data flows and network load generally change over time, possibly very quickly, so that a static, one-time placement is not an adequate solution. Hence, a framework that determines these locations should also flexibly reassign them over time. We address this need by a flexible flow processing-aware controller placement framework (FlexFCPF), which places and flexibly reassigns controller devices that are able to perform both network control (conventional SDN) and data flow processing for an efficient management of future wireless networks. We have developed and implemented a fast heuristic framework and we prove its efficiency by providing evaluation results of FlexFCPF's performance in a dynamic network simulation.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120839087","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343349
Yafei Wang, Bin Xia, Zhiyong Chen
In this paper, we investigate a two-way full-duplex (TWFD) amplify-forward (AF) relay cooperative communication system, of which all transceiver nodes operate in full-duplex (FD) mode. Considering that the self-interference (SI) introduced by the Co-time Co-frequency transceiver is closely related to the local transmitting power, we view the average power of residual self-interference (RSI) as the transmitting power multiplied by one coefficient representing the SI cancelation capability quantitatively. We analytically derive the exact expressions of the outage probabilities for the forward and backward links. Besides, we investigate the achievable rate which can hardly be obtained in closed-form, however, an approximate expression for it as one upper bound is given by the Jensen's inequality. Numerical results are also provided to verify the validity of theoretical analysis.
{"title":"Performance analysis of two-way full-duplex amplify-forward relay systems","authors":"Yafei Wang, Bin Xia, Zhiyong Chen","doi":"10.1109/PIMRC.2015.7343349","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343349","url":null,"abstract":"In this paper, we investigate a two-way full-duplex (TWFD) amplify-forward (AF) relay cooperative communication system, of which all transceiver nodes operate in full-duplex (FD) mode. Considering that the self-interference (SI) introduced by the Co-time Co-frequency transceiver is closely related to the local transmitting power, we view the average power of residual self-interference (RSI) as the transmitting power multiplied by one coefficient representing the SI cancelation capability quantitatively. We analytically derive the exact expressions of the outage probabilities for the forward and backward links. Besides, we investigate the achievable rate which can hardly be obtained in closed-form, however, an approximate expression for it as one upper bound is given by the Jensen's inequality. Numerical results are also provided to verify the validity of theoretical analysis.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120974154","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}
Pub Date : 2015-12-03DOI: 10.1109/PIMRC.2015.7343626
D. Liang, Zhaojing Zhang, Anni Piao, Shanghong Zhang
Indoor localization is of great importance in daily and commercial applications. This paper proposes a novel indoor localization algorithm based on iterative K-means and grid scoring (KS) and a mechanism of access point (AP) scoring. The basic approach of the proposed algorithm is composed of a two-step iteration. The first step is to randomly select a group of APs. Then, the mobile terminal is located into one cluster based on the received signal strength of the selected APs and the score of all the grids belonging to this cluster. After several iterations, the location estimation is selected as the grid with the highest score. To further improve the localization accuracy, AP scoring (AS) is adopted to select the APs with superior localization capability. The suggested algorithm can locate a position effectively with relatively high accuracy. The expected results are demonstrated using simulations.
{"title":"Indoor localization algorithm based on iterative grid clustering and AP scoring","authors":"D. Liang, Zhaojing Zhang, Anni Piao, Shanghong Zhang","doi":"10.1109/PIMRC.2015.7343626","DOIUrl":"https://doi.org/10.1109/PIMRC.2015.7343626","url":null,"abstract":"Indoor localization is of great importance in daily and commercial applications. This paper proposes a novel indoor localization algorithm based on iterative K-means and grid scoring (KS) and a mechanism of access point (AP) scoring. The basic approach of the proposed algorithm is composed of a two-step iteration. The first step is to randomly select a group of APs. Then, the mobile terminal is located into one cluster based on the received signal strength of the selected APs and the score of all the grids belonging to this cluster. After several iterations, the location estimation is selected as the grid with the highest score. To further improve the localization accuracy, AP scoring (AS) is adopted to select the APs with superior localization capability. The suggested algorithm can locate a position effectively with relatively high accuracy. The expected results are demonstrated using simulations.","PeriodicalId":274734,"journal":{"name":"2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126562936","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}
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