Pub Date : 2017-11-04DOI: 10.1109/PIMRC.2017.8292600
V. Kumar, R. Arablouei, R. Jurdak, B. Kusy, N. Bergmann
We consider the problem of self-localization by a resource-constrained mobile node given perturbed anchor position information and distance estimates from the anchor nodes. We consider normally-distributed noise in anchor position information. The distance estimates are based on the log-normal shadowing path-loss model for the RSSI measurements. The available solutions to this problem are based on complex and iterative optimization techniques such as semidefinite programming or second-order cone programming, which are not suitable for resource-constrained environments. In this paper, we propose a closed-form weighted least-squares solution. We calculate the weights by taking into account the statistical properties of the perturbations in both RSSI and anchor position information. We also estimate the bias of the proposed solution and subtract it from the proposed solution. We evaluate the performance of the proposed algorithm considering a set of arbitrary network topologies in comparison to an existing algorithm that is based on a similar approach but only accounts for perturbations in the RSSI measurements. We also compare the results with the corresponding Cramer-Rao lower bound. Our experimental evaluation shows that the proposed algorithm can substantially improve the localization performance in terms of both root mean square error and bias.
{"title":"RSSI-based self-localization with perturbed anchor positions","authors":"V. Kumar, R. Arablouei, R. Jurdak, B. Kusy, N. Bergmann","doi":"10.1109/PIMRC.2017.8292600","DOIUrl":"https://doi.org/10.1109/PIMRC.2017.8292600","url":null,"abstract":"We consider the problem of self-localization by a resource-constrained mobile node given perturbed anchor position information and distance estimates from the anchor nodes. We consider normally-distributed noise in anchor position information. The distance estimates are based on the log-normal shadowing path-loss model for the RSSI measurements. The available solutions to this problem are based on complex and iterative optimization techniques such as semidefinite programming or second-order cone programming, which are not suitable for resource-constrained environments. In this paper, we propose a closed-form weighted least-squares solution. We calculate the weights by taking into account the statistical properties of the perturbations in both RSSI and anchor position information. We also estimate the bias of the proposed solution and subtract it from the proposed solution. We evaluate the performance of the proposed algorithm considering a set of arbitrary network topologies in comparison to an existing algorithm that is based on a similar approach but only accounts for perturbations in the RSSI measurements. We also compare the results with the corresponding Cramer-Rao lower bound. Our experimental evaluation shows that the proposed algorithm can substantially improve the localization performance in terms of both root mean square error and bias.","PeriodicalId":397107,"journal":{"name":"2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116945238","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 : 2017-10-13DOI: 10.1109/PIMRC.2017.8292549
T. Xu, I. Darwazeh
Much work has been done on a non-orthogonal signal termed spectrally efficient frequency division multiplexing (SEFDM). Due to its self-created inter carrier interference (ICI), signal detection is complicated. A linear detector named iterative detection (ID) detector shows better bit error rate (BER) performance and complexity trade-off than other linear detectors. Therefore, this work shows the first time hardware modelling of the ID detector at the register transfer level (RTL) stage. The impact of bit precision on the system performance is studied at the beginning. Then, an RTL model is designed with results showing competitive fixed-point performance which are comparable to Matlab floating-point results. Verification work is operated in a co-simulation environment through comparison between fixed-point Matlab results and ISim (a hardware modelling software from Xilinx Inc.) simulation results. Their results are consistent indicating the hardware model is correct.
{"title":"Bit precision study of a non-orthogonal iterative detector with FPGA modelling verification","authors":"T. Xu, I. Darwazeh","doi":"10.1109/PIMRC.2017.8292549","DOIUrl":"https://doi.org/10.1109/PIMRC.2017.8292549","url":null,"abstract":"Much work has been done on a non-orthogonal signal termed spectrally efficient frequency division multiplexing (SEFDM). Due to its self-created inter carrier interference (ICI), signal detection is complicated. A linear detector named iterative detection (ID) detector shows better bit error rate (BER) performance and complexity trade-off than other linear detectors. Therefore, this work shows the first time hardware modelling of the ID detector at the register transfer level (RTL) stage. The impact of bit precision on the system performance is studied at the beginning. Then, an RTL model is designed with results showing competitive fixed-point performance which are comparable to Matlab floating-point results. Verification work is operated in a co-simulation environment through comparison between fixed-point Matlab results and ISim (a hardware modelling software from Xilinx Inc.) simulation results. Their results are consistent indicating the hardware model is correct.","PeriodicalId":397107,"journal":{"name":"2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115232321","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 : 2017-10-13DOI: 10.1109/PIMRC.2017.8292777
Lei Zhang, Chang He, J. Mao, A. Ijaz, P. Xiao
We propose channel estimation algorithms and pilot signal optimization for the universal filtered multi-carrier (UFMC) system based on the comb-type pilot pattern. By considering the least square linear interpolation (LSLI), discrete Fourier transform (DFT), minimum mean square error (MMSE) and relaxed MMSE (RMMSE) channel estimators, we formulate the pilot signals optimization problem by minimizing the estimation MSE subject to the power constraint on pilot tones. The closed-form optimal solutions and minimum MSE are derived for LSLI, DFT, MMSE and RMMSE estimators.
{"title":"Channel estimation and optimal pilot signals for universal filtered multi-carrier (UFMC) systems","authors":"Lei Zhang, Chang He, J. Mao, A. Ijaz, P. Xiao","doi":"10.1109/PIMRC.2017.8292777","DOIUrl":"https://doi.org/10.1109/PIMRC.2017.8292777","url":null,"abstract":"We propose channel estimation algorithms and pilot signal optimization for the universal filtered multi-carrier (UFMC) system based on the comb-type pilot pattern. By considering the least square linear interpolation (LSLI), discrete Fourier transform (DFT), minimum mean square error (MMSE) and relaxed MMSE (RMMSE) channel estimators, we formulate the pilot signals optimization problem by minimizing the estimation MSE subject to the power constraint on pilot tones. The closed-form optimal solutions and minimum MSE are derived for LSLI, DFT, MMSE and RMMSE estimators.","PeriodicalId":397107,"journal":{"name":"2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131793706","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 : 2017-10-13DOI: 10.1109/PIMRC.2017.8292518
Oluwakayode Onireti, Abdelrahim Mohamed, H. Pervaiz, M. Imran
In this paper, we present an analytical framework to model the sleep mode power consumption of a base station (BS) as a function of its sleep depth. The sleep depth is made up of the BS deactivation latency, actual sleep period and activation latency. Numerical results demonstrate a close match between our proposed approach and the actual sleep mode power consumption for selected BS types. As an application of our proposed approach, we analyze the optimal sleep depth of a BS, taking into consideration the increased power consumption during BS activation, which exceeds its no-load power consumption. We also consider the power consumed during BS deactivation, which also exceeds the power consumed when the actual sleep level is attained. From the results, we can observe that the average total power consumption of a BS monotonically decreases with the sleep depth as long as the ratio between the actual sleep period and the transition latency (deactivation plus reactivation latency) exceeds a certain threshold.
{"title":"Analytical approach to base station sleep mode power consumption and sleep depth","authors":"Oluwakayode Onireti, Abdelrahim Mohamed, H. Pervaiz, M. Imran","doi":"10.1109/PIMRC.2017.8292518","DOIUrl":"https://doi.org/10.1109/PIMRC.2017.8292518","url":null,"abstract":"In this paper, we present an analytical framework to model the sleep mode power consumption of a base station (BS) as a function of its sleep depth. The sleep depth is made up of the BS deactivation latency, actual sleep period and activation latency. Numerical results demonstrate a close match between our proposed approach and the actual sleep mode power consumption for selected BS types. As an application of our proposed approach, we analyze the optimal sleep depth of a BS, taking into consideration the increased power consumption during BS activation, which exceeds its no-load power consumption. We also consider the power consumed during BS deactivation, which also exceeds the power consumed when the actual sleep level is attained. From the results, we can observe that the average total power consumption of a BS monotonically decreases with the sleep depth as long as the ratio between the actual sleep period and the transition latency (deactivation plus reactivation latency) exceeds a certain threshold.","PeriodicalId":397107,"journal":{"name":"2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127062601","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 : 2017-10-13DOI: 10.1109/PIMRC.2017.8292513
Satyanarayana Vuppala, S. Chatzinotas, B. Ottersten
In this paper, we investigate the secrecy outage probability of random wireless networks from the perspective of the k-th best source, which has still not been well characterized. We consider the artificial noise (AN) transmission strategy at source nodes to confuse the eavesdropper. Furthermore, we use a concept of security-region based on the k-th best source index. This is pragmatic in creating a protected communication zone for the typical destination and also in bounding the number of sources that can cooperate in a Coordinated Multi-point transmission (CoMP) network. We further derive the secrecy outage probability for these CoMP sources based on the security-region. We also provide a closed-form expression for the maximum number of eavesdroppers for a given secrecy outage constraint, which can effect the secure communication. Tractable numerical results are presented under various assumptions of densities, antenna gains, AN transmission factors and path loss exponents.
{"title":"Secrecy analysis of random wireless networks with multiple eavesdroppers","authors":"Satyanarayana Vuppala, S. Chatzinotas, B. Ottersten","doi":"10.1109/PIMRC.2017.8292513","DOIUrl":"https://doi.org/10.1109/PIMRC.2017.8292513","url":null,"abstract":"In this paper, we investigate the secrecy outage probability of random wireless networks from the perspective of the k-th best source, which has still not been well characterized. We consider the artificial noise (AN) transmission strategy at source nodes to confuse the eavesdropper. Furthermore, we use a concept of security-region based on the k-th best source index. This is pragmatic in creating a protected communication zone for the typical destination and also in bounding the number of sources that can cooperate in a Coordinated Multi-point transmission (CoMP) network. We further derive the secrecy outage probability for these CoMP sources based on the security-region. We also provide a closed-form expression for the maximum number of eavesdroppers for a given secrecy outage constraint, which can effect the secure communication. Tractable numerical results are presented under various assumptions of densities, antenna gains, AN transmission factors and path loss exponents.","PeriodicalId":397107,"journal":{"name":"2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131451070","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 : 2017-10-13DOI: 10.1109/PIMRC.2017.8292440
T. Xu, I. Darwazeh
This work investigates several experimental validations for the bandwidth compressed multicarrier signal termed spectrally efficient frequency division multiplexing (SEFDM). The signal compresses bandwidth, therefore improved spectral efficiency, by packing sub-carriers closer. Unlike typical orthogonal frequency division multiplexing (OFDM) signals, SEFDM violates the orthogonality criterion, therefore self-created inter carrier interference (ICI) is introduced. In this work, to ameliorate the effect of interference, a method based on sub-carrier pulse shaping, targeting massive machine-type communication (mMTC), is developed and tested experimentally. Practical over-the-air testing of the proposal is operated on commercially developed software defined radio platforms. Results show that in the condition of coexistence scenario SEFDM can significantly reduce interference when used with existing long term evolution (LTE) signals leading to improved quality of service. The throughput of LTE signals is therefore improved from 49.92 Mbps to 63.21 Mbps. Additionally, the proposed pulse shaping Nyquist-SEFDM performs well in scenarios where the spectrum is limited and in fact it outperforms pulse shaped OFDM significantly, both in terms of bandwidth saving and throughput, which is boosted from 4.35 Mbps to 43.36 Mbps.
{"title":"Experimental over-the-air testing for coexistence of 4G and a spectrally efficient non-orthogonal signal","authors":"T. Xu, I. Darwazeh","doi":"10.1109/PIMRC.2017.8292440","DOIUrl":"https://doi.org/10.1109/PIMRC.2017.8292440","url":null,"abstract":"This work investigates several experimental validations for the bandwidth compressed multicarrier signal termed spectrally efficient frequency division multiplexing (SEFDM). The signal compresses bandwidth, therefore improved spectral efficiency, by packing sub-carriers closer. Unlike typical orthogonal frequency division multiplexing (OFDM) signals, SEFDM violates the orthogonality criterion, therefore self-created inter carrier interference (ICI) is introduced. In this work, to ameliorate the effect of interference, a method based on sub-carrier pulse shaping, targeting massive machine-type communication (mMTC), is developed and tested experimentally. Practical over-the-air testing of the proposal is operated on commercially developed software defined radio platforms. Results show that in the condition of coexistence scenario SEFDM can significantly reduce interference when used with existing long term evolution (LTE) signals leading to improved quality of service. The throughput of LTE signals is therefore improved from 49.92 Mbps to 63.21 Mbps. Additionally, the proposed pulse shaping Nyquist-SEFDM performs well in scenarios where the spectrum is limited and in fact it outperforms pulse shaped OFDM significantly, both in terms of bandwidth saving and throughput, which is boosted from 4.35 Mbps to 43.36 Mbps.","PeriodicalId":397107,"journal":{"name":"2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129280446","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 : 2017-10-13DOI: 10.1109/PIMRC.2017.8292604
Chang He, P. Xiao, Lei Zhang, J. Mao, Aijun Cao, K. Nikitopoulos
The discrete cosine transform (DCT) based multicarrier modulation (MCM) system is regarded as one of the promising transmission techniques for future wireless communications. By employing cosine basis as orthogonal functions for multiplexing each real-valued symbol with symbol period of T, it is able to maintain the subcarrier orthogonality while reducing frequency spacing to 1/(2T) Hz, which is only half of that compared to discrete Fourier transform (DFT) based multicarrier systems. In this paper, following one of the effective transmission models by which zeros are inserted as guard sequence and the DCT operation at the receiver is replaced by DFT of double length, we reformulate and evaluate three classic detection methods by appropriately processing the post-DFT signals both for single antenna and multiple-input multiple-output (MIMO) DCT-MCM systems. In all cases, we show that with our reformulated detection approaches, DCT-MCM schemes can outperform, in terms of error-rate, conventional OFDM-based systems.
{"title":"Efficient DCT-MCM detection for single and multi-antenna wireless systems","authors":"Chang He, P. Xiao, Lei Zhang, J. Mao, Aijun Cao, K. Nikitopoulos","doi":"10.1109/PIMRC.2017.8292604","DOIUrl":"https://doi.org/10.1109/PIMRC.2017.8292604","url":null,"abstract":"The discrete cosine transform (DCT) based multicarrier modulation (MCM) system is regarded as one of the promising transmission techniques for future wireless communications. By employing cosine basis as orthogonal functions for multiplexing each real-valued symbol with symbol period of T, it is able to maintain the subcarrier orthogonality while reducing frequency spacing to 1/(2T) Hz, which is only half of that compared to discrete Fourier transform (DFT) based multicarrier systems. In this paper, following one of the effective transmission models by which zeros are inserted as guard sequence and the DCT operation at the receiver is replaced by DFT of double length, we reformulate and evaluate three classic detection methods by appropriately processing the post-DFT signals both for single antenna and multiple-input multiple-output (MIMO) DCT-MCM systems. In all cases, we show that with our reformulated detection approaches, DCT-MCM schemes can outperform, in terms of error-rate, conventional OFDM-based systems.","PeriodicalId":397107,"journal":{"name":"2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132351353","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 : 2017-10-12DOI: 10.1109/PIMRC.2017.8292345
E. Almeida, G. Caldwell, Ignacio Rodriguez, Salvador Abreu, R. Vieira, V. S. B. Barbosa, T. B. Sørensen, P. Mogensen, L. U. Garcia
In this paper we present the results of an extensive measurement campaign performed at two large iron ore mining centers in Brazil at the 2.6 GHz band. Although several studies focusing on radio propagation in underground mines have been published, measurement data and careful analyses for open-pit mines are still scarce. Our results aim at filling this gap in the literature. The research is motivated by the ongoing mine automation initiatives, where connectivity becomes critical. This paper presents the first set of results comprising measurements under a gamut of propagation conditions. A second paper detailing sub-GHz propagation is also in preparation. The results indicate that conventional wisdom is wrong, in other words, radio-frequency (RF) propagation in surface mines can be far more elaborate than plain free-space line-of-sight conditions. Additionally, the old mining adage “no two mines alike” seems to remain true in the RF domain.
{"title":"Radio propagation in open-pit mines: A first look at measurements in the 2.6 GHz band","authors":"E. Almeida, G. Caldwell, Ignacio Rodriguez, Salvador Abreu, R. Vieira, V. S. B. Barbosa, T. B. Sørensen, P. Mogensen, L. U. Garcia","doi":"10.1109/PIMRC.2017.8292345","DOIUrl":"https://doi.org/10.1109/PIMRC.2017.8292345","url":null,"abstract":"In this paper we present the results of an extensive measurement campaign performed at two large iron ore mining centers in Brazil at the 2.6 GHz band. Although several studies focusing on radio propagation in underground mines have been published, measurement data and careful analyses for open-pit mines are still scarce. Our results aim at filling this gap in the literature. The research is motivated by the ongoing mine automation initiatives, where connectivity becomes critical. This paper presents the first set of results comprising measurements under a gamut of propagation conditions. A second paper detailing sub-GHz propagation is also in preparation. The results indicate that conventional wisdom is wrong, in other words, radio-frequency (RF) propagation in surface mines can be far more elaborate than plain free-space line-of-sight conditions. Additionally, the old mining adage “no two mines alike” seems to remain true in the RF domain.","PeriodicalId":397107,"journal":{"name":"2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131333442","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 : 2017-10-11DOI: 10.1109/PIMRC.2017.8292472
Hyungsik Han, Hyuncheol Park
The carrier frequency offset (CFO) on the orthogonal frequency division multiplexing (OFDM) and offset-QAM-filter-bank based multi-carrier (FBMC) have been well studied. However, the impact of the CFO on the QAM-FBMC systems is complicated because of an unavoidable interferences from non-orthogonal prototype filters. In this paper, we analyze the impact of the CFO on the QAM-FBMC systems, and propose the method of the CFO estimation. By the analysis of the CFO, the CFO is separated to the integer part and fractional part. For the integer part estimation, we propose the pilot design to guarantee the relative high power at pilot subcarrier location in up-sampled frequency domain. For the fractional part estimation, we formulate the inner product equation between two preamble symbols, and suggest the approximated estimation for lack of the channel information. Simulation results show the performance of the CFO estimation in AWGN and pedestrian channel, and also show that the proposed approximated estimation works well with a slight performance degradation.
{"title":"CFO estimation for QAM-FBMC systems considering non-orthogonal prototype filters","authors":"Hyungsik Han, Hyuncheol Park","doi":"10.1109/PIMRC.2017.8292472","DOIUrl":"https://doi.org/10.1109/PIMRC.2017.8292472","url":null,"abstract":"The carrier frequency offset (CFO) on the orthogonal frequency division multiplexing (OFDM) and offset-QAM-filter-bank based multi-carrier (FBMC) have been well studied. However, the impact of the CFO on the QAM-FBMC systems is complicated because of an unavoidable interferences from non-orthogonal prototype filters. In this paper, we analyze the impact of the CFO on the QAM-FBMC systems, and propose the method of the CFO estimation. By the analysis of the CFO, the CFO is separated to the integer part and fractional part. For the integer part estimation, we propose the pilot design to guarantee the relative high power at pilot subcarrier location in up-sampled frequency domain. For the fractional part estimation, we formulate the inner product equation between two preamble symbols, and suggest the approximated estimation for lack of the channel information. Simulation results show the performance of the CFO estimation in AWGN and pedestrian channel, and also show that the proposed approximated estimation works well with a slight performance degradation.","PeriodicalId":397107,"journal":{"name":"2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126916117","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 : 2017-10-11DOI: 10.1109/PIMRC.2017.8292562
Mhd. Zaher Mahfouz, A. Meijerink, M. Bentum
Industrial and consumer applications, such as smart energy and e-wearables, have become a reality — thanks to the Internet of Things and wireless sensor networks — creating a billions-worth market. Very-large-scale integration combined with energy scavenging give a promising ultra-low-power, cost-effective, and environment-friendly solution for the increasing power consumption demands as tens of millions of nodes are deployed worldwide every year. Most available wireless standards are power-hungry and, therefore, not suitable for energy scavenging. In this paper, we motivate ultranarrowband as an energy-scavenging-compatible wireless technology for low-throughput wireless sensor networks (WSNs). The ultra-narrowband approach is energy-efficient for two case scenarios. The first one is for WSNs with a large coverage area. The second case scenario is where WSN nodes experience a high level of interference from other co-existing communication systems. Two practical use cases are studied numerically, one for each case scenario. In both cases, on a node level, the link is significantly imbalanced between the transmitting and receiving sections in terms of energy consumption and data rate. However, in case of an interference-rich environment, the radiated power from the WSN base station as well as the WSN nodes is preferred to be as low as possible, thus leading to a more balanced link.
{"title":"Ultra-narrowband for energy-scavenging-powered wireless sensor networks","authors":"Mhd. Zaher Mahfouz, A. Meijerink, M. Bentum","doi":"10.1109/PIMRC.2017.8292562","DOIUrl":"https://doi.org/10.1109/PIMRC.2017.8292562","url":null,"abstract":"Industrial and consumer applications, such as smart energy and e-wearables, have become a reality — thanks to the Internet of Things and wireless sensor networks — creating a billions-worth market. Very-large-scale integration combined with energy scavenging give a promising ultra-low-power, cost-effective, and environment-friendly solution for the increasing power consumption demands as tens of millions of nodes are deployed worldwide every year. Most available wireless standards are power-hungry and, therefore, not suitable for energy scavenging. In this paper, we motivate ultranarrowband as an energy-scavenging-compatible wireless technology for low-throughput wireless sensor networks (WSNs). The ultra-narrowband approach is energy-efficient for two case scenarios. The first one is for WSNs with a large coverage area. The second case scenario is where WSN nodes experience a high level of interference from other co-existing communication systems. Two practical use cases are studied numerically, one for each case scenario. In both cases, on a node level, the link is significantly imbalanced between the transmitting and receiving sections in terms of energy consumption and data rate. However, in case of an interference-rich environment, the radiated power from the WSN base station as well as the WSN nodes is preferred to be as low as possible, thus leading to a more balanced link.","PeriodicalId":397107,"journal":{"name":"2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115170642","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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