Pub Date : 2015-12-03DOI: 10.1109/WCSP.2015.7340970
Xiuling Sun, Wen-qin Wang, Hui Chen, H. Shao
Two-way relaying showed distinct advantages in spectral efficiency for pairs of source nodes to exchange information via a multiple-input multiple-output (MIMO) amplify-and-forward (AF) relay node. This paper studies the relay beamforming problem in the scenario where multiple pairs of users communicate via a MIMO relay node, in order to achieve a beer rate and guarantee the fairness of user's rate. In the relay beamforming design we consider the maximum of minimum information rate among the user pairs as the target and the total relay transmit power as the constrain. The corresponding optimization problem can be built into a difference-of-convex functions (DC) program, and it can be well solved by an effective algorithm. Numerical results show that, the proposed method enjoys the merits of both max-min fairness and sum-rate when compared with existing relay beamforming methods.
{"title":"Relay beamforming for multi-pair two-way MIMO relay systems with max-min fairness","authors":"Xiuling Sun, Wen-qin Wang, Hui Chen, H. Shao","doi":"10.1109/WCSP.2015.7340970","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7340970","url":null,"abstract":"Two-way relaying showed distinct advantages in spectral efficiency for pairs of source nodes to exchange information via a multiple-input multiple-output (MIMO) amplify-and-forward (AF) relay node. This paper studies the relay beamforming problem in the scenario where multiple pairs of users communicate via a MIMO relay node, in order to achieve a beer rate and guarantee the fairness of user's rate. In the relay beamforming design we consider the maximum of minimum information rate among the user pairs as the target and the total relay transmit power as the constrain. The corresponding optimization problem can be built into a difference-of-convex functions (DC) program, and it can be well solved by an effective algorithm. Numerical results show that, the proposed method enjoys the merits of both max-min fairness and sum-rate when compared with existing relay beamforming methods.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"44 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120859802","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/WCSP.2015.7341077
Qifeng Wang, Benxiong Huang, Zheng-guang Xu
Shaped-offset quadrature phase shift keying (SO-QPSK) is a special case of continuous phase modulation (CPM) and is widely employed on SATCOM links. We analyze the phase trajectory of SOQPSK and find that the phase change in a bit period is zero for a zero symbol and ±π/2 for a non-zero symbol. Based on this, we propose a new timing recovery scheme that uses the fourth-power nonlinearity to eliminate the self-noise caused by the symbol information. Through the nonlinear operation, the modulated SOQPSK signal is converted into a direct current (DC) signal for the zero symbol and a tone for the non-zero symbol. The phase drift is estimated from the DC signal and the timing offset is estimated from the initial phase of the tone. The lower bounds of the estimation errors for the phase and timing estimations are reduced in high signal-to-noise ratio (SNR). The lower bound for the phase error is 4 times of the MCRB(θ) and the lower bound for the timing error is also 4 times of the MCRB(τ). Simulation results indicate that the proposed scheme is effective and the estimation errors agree with the derived bounds.
{"title":"Joint phase and timing recovery for SOQPSK based on phase trajectory","authors":"Qifeng Wang, Benxiong Huang, Zheng-guang Xu","doi":"10.1109/WCSP.2015.7341077","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341077","url":null,"abstract":"Shaped-offset quadrature phase shift keying (SO-QPSK) is a special case of continuous phase modulation (CPM) and is widely employed on SATCOM links. We analyze the phase trajectory of SOQPSK and find that the phase change in a bit period is zero for a zero symbol and ±π/2 for a non-zero symbol. Based on this, we propose a new timing recovery scheme that uses the fourth-power nonlinearity to eliminate the self-noise caused by the symbol information. Through the nonlinear operation, the modulated SOQPSK signal is converted into a direct current (DC) signal for the zero symbol and a tone for the non-zero symbol. The phase drift is estimated from the DC signal and the timing offset is estimated from the initial phase of the tone. The lower bounds of the estimation errors for the phase and timing estimations are reduced in high signal-to-noise ratio (SNR). The lower bound for the phase error is 4 times of the MCRB(θ) and the lower bound for the timing error is also 4 times of the MCRB(τ). Simulation results indicate that the proposed scheme is effective and the estimation errors agree with the derived bounds.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"6 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":"127115863","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/WCSP.2015.7341013
F. Dong, QUAN LIU, Wei Zhang, Lei Guo, Xionglin Zhou
In this paper, a novel integrated high altitude platform/satellite (IHS) network system model for energy-efficient transmissions is proposed. In a slow flat Rician fading channel, the concept of link-state advertisement (LSA) is investigated, which estimates the channel state information by broadcasting LSAs at the HAP end and the satellite end rather than sensing at the terminal end, and which can significantly reduce the energy consumption of the terminal end. In addition, the energy consumption is modeled and the adaptive algorithm for the energy-efficient path selection is given. The simulation results validate the proposed adaptive algorithm. It is shown that the proposed adaptive algorithm can significantly improve the energy-efficient performance.
{"title":"Energy-efficient transmissions in integrated HAP/satellite networks for emergency communications","authors":"F. Dong, QUAN LIU, Wei Zhang, Lei Guo, Xionglin Zhou","doi":"10.1109/WCSP.2015.7341013","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341013","url":null,"abstract":"In this paper, a novel integrated high altitude platform/satellite (IHS) network system model for energy-efficient transmissions is proposed. In a slow flat Rician fading channel, the concept of link-state advertisement (LSA) is investigated, which estimates the channel state information by broadcasting LSAs at the HAP end and the satellite end rather than sensing at the terminal end, and which can significantly reduce the energy consumption of the terminal end. In addition, the energy consumption is modeled and the adaptive algorithm for the energy-efficient path selection is given. The simulation results validate the proposed adaptive algorithm. It is shown that the proposed adaptive algorithm can significantly improve the energy-efficient performance.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"50 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":"129184132","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/WCSP.2015.7341304
Hai-xia Peng, Shuaizong Si, Xuemin Shen, Hai Zhao
Wireless sensor networks (WSNs), comprising a larger number of battery-powered sensor nodes for event monitoring and data gathering, have been widely deployed into various military and industrial applications. Since most of WSN applications aim to make full use of the energy-limited sensor nodes to monitor a wide area for a long time, energy efficiency and scalability become two important performance metrics for WSNs. Clustering has been proved to be an effective way to improve energy efficiency and network lifetime for WSNs. However, with the increasing scale of WSNs, existing clustering schemes would face significant limitations in improving energy efficiency and prolonging network lifetime. Inspired by the similar features between large scale WSNs and complex networks, some analysis methods in complex networks can be utilized to address these limitations. In this paper, we propose a clustering scheme, named Energy-aware and Scalable Clustering Scheme (ESCS), to enhance the energy efficiency and scalability in WSNs. The proposed scheme is based on the inherent characteristics of WSNs and evolution idea of Barabasi-Albert (BA) model. Extensive simulation results demonstrate that ESCS can prolong the network lifetime and significantly improve the scalability of WSNs.
{"title":"Energy-efficient and scalable clustering scheme for wireless sensor networks","authors":"Hai-xia Peng, Shuaizong Si, Xuemin Shen, Hai Zhao","doi":"10.1109/WCSP.2015.7341304","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341304","url":null,"abstract":"Wireless sensor networks (WSNs), comprising a larger number of battery-powered sensor nodes for event monitoring and data gathering, have been widely deployed into various military and industrial applications. Since most of WSN applications aim to make full use of the energy-limited sensor nodes to monitor a wide area for a long time, energy efficiency and scalability become two important performance metrics for WSNs. Clustering has been proved to be an effective way to improve energy efficiency and network lifetime for WSNs. However, with the increasing scale of WSNs, existing clustering schemes would face significant limitations in improving energy efficiency and prolonging network lifetime. Inspired by the similar features between large scale WSNs and complex networks, some analysis methods in complex networks can be utilized to address these limitations. In this paper, we propose a clustering scheme, named Energy-aware and Scalable Clustering Scheme (ESCS), to enhance the energy efficiency and scalability in WSNs. The proposed scheme is based on the inherent characteristics of WSNs and evolution idea of Barabasi-Albert (BA) model. Extensive simulation results demonstrate that ESCS can prolong the network lifetime and significantly improve the scalability of WSNs.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","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":"133411491","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/WCSP.2015.7341196
Jingzhuo Zhang, Guolong He, Peng Bai, Ning Ge
The plasma sheath surrounding vehicles traveling at hypersonic velocity absorbs and distorts electromagnetic (EM) waves, resulting in communication blackout. Unlike traditional multi-path channels, the plasma sheath channel is determined by plasma turbulence and its interactions with EM waves. A new channel model for turbulent plasma sheath is proposed, which is highly parameterized for the convenience of the communication verification. The model is based on 1/fα colored noise and the parameters are derived by propagating the EM wave through uniform plasma field. Statistical characteristics of the channel are investigated by simulations. Results show that signals would be severely modulated by the channel which is distinguished by non-stationary time varying and deep fading. What is more, plasma channels can be generated efficiently with the proposed model.
{"title":"Dynamic channel modeling for communication through turbulent plasma sheath","authors":"Jingzhuo Zhang, Guolong He, Peng Bai, Ning Ge","doi":"10.1109/WCSP.2015.7341196","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341196","url":null,"abstract":"The plasma sheath surrounding vehicles traveling at hypersonic velocity absorbs and distorts electromagnetic (EM) waves, resulting in communication blackout. Unlike traditional multi-path channels, the plasma sheath channel is determined by plasma turbulence and its interactions with EM waves. A new channel model for turbulent plasma sheath is proposed, which is highly parameterized for the convenience of the communication verification. The model is based on 1/fα colored noise and the parameters are derived by propagating the EM wave through uniform plasma field. Statistical characteristics of the channel are investigated by simulations. Results show that signals would be severely modulated by the channel which is distinguished by non-stationary time varying and deep fading. What is more, plasma channels can be generated efficiently with the proposed model.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"28 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":"127772358","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/WCSP.2015.7341049
Wen Li, Lidong Zhu
In the future, BeiDou Navigation Satellite System (BDS) will has a more widely application in various fields, and high accuracy and fast positioning will be increasingly demanded. Satellite selecting algorithm has a vital influence on positioning accuracy and speed. Therefore, optimal algorithm to select satellites is one of important steps; it will be benefit to improve positioning precision and real-time of navigation. The paper proposes a new satellite selecting algorithm for BDS that bottom satellites are selected in turn after the top and the first bottom satellite are selected. The algorithm selects the optimal satellites for navigation by making full use of available information and the simulated and validated by some simulation results. The results show that the algorithm can improve real-time performance and choose better satellite combination. In addition, it has the advantages of simple, practical, and easy to implement.
{"title":"A novel satellite selecting algorithm for BeiDou navigation satellite system","authors":"Wen Li, Lidong Zhu","doi":"10.1109/WCSP.2015.7341049","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341049","url":null,"abstract":"In the future, BeiDou Navigation Satellite System (BDS) will has a more widely application in various fields, and high accuracy and fast positioning will be increasingly demanded. Satellite selecting algorithm has a vital influence on positioning accuracy and speed. Therefore, optimal algorithm to select satellites is one of important steps; it will be benefit to improve positioning precision and real-time of navigation. The paper proposes a new satellite selecting algorithm for BDS that bottom satellites are selected in turn after the top and the first bottom satellite are selected. The algorithm selects the optimal satellites for navigation by making full use of available information and the simulated and validated by some simulation results. The results show that the algorithm can improve real-time performance and choose better satellite combination. In addition, it has the advantages of simple, practical, and easy to implement.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"4 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":"128710707","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/WCSP.2015.7341107
K. Lu, Gongpu Wang, Fengzhong Qu, Z. Zhong
Devices that harvest power from radio-frequency (RF) signals are generally referred to as RF-powered devices. One emerging technology that enables RF-powered devices to communicate with others is ambient backscatter. In this paper, we study the problem of signal detection and analyse the uplink bit error rate (BER) performance for RF-powered devices utilizing ambient backscatter. Specifically, we build up a theoretical model for a communication system which consists of one reader and one tag. The tag employs ambient backscatter to communicate with the reader. Next we design an optimal detector which can minimize the BER and find the closed-form expression for the detection threshold. Noting that the optimal detector cannot result in equal BERs in detect “0” or “1”, therefore we design another detector that can achieve the same error probability in detecting “0” with that in detecting “1”. Moreover, we analyse the BER performance for both detectors. Finally, simulations are provided to corroborate the proposed studies.
{"title":"Signal detection and BER analysis for RF-powered devices utilizing ambient backscatter","authors":"K. Lu, Gongpu Wang, Fengzhong Qu, Z. Zhong","doi":"10.1109/WCSP.2015.7341107","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341107","url":null,"abstract":"Devices that harvest power from radio-frequency (RF) signals are generally referred to as RF-powered devices. One emerging technology that enables RF-powered devices to communicate with others is ambient backscatter. In this paper, we study the problem of signal detection and analyse the uplink bit error rate (BER) performance for RF-powered devices utilizing ambient backscatter. Specifically, we build up a theoretical model for a communication system which consists of one reader and one tag. The tag employs ambient backscatter to communicate with the reader. Next we design an optimal detector which can minimize the BER and find the closed-form expression for the detection threshold. Noting that the optimal detector cannot result in equal BERs in detect “0” or “1”, therefore we design another detector that can achieve the same error probability in detecting “0” with that in detecting “1”. Moreover, we analyse the BER performance for both detectors. Finally, simulations are provided to corroborate the proposed studies.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","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":"128742977","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/WCSP.2015.7341040
Xiaoqiong Xu, Zhaorong Zhou, Liu Yang, Li Li
Recently, great efforts have been devoted to the research of routing algorithms in delay tolerant networks, but existing works mainly focus on the positive social properties to design routing algorithms, in which nodes are supposed to be willing to help others carry and forward messages, few involve the negative social properties, such as selfishness. However, in reality, the resources of mobile nodes are limited, and helping others to carry and forward messages result in resource depletion. Therefore, mobile nodes behave selfishly to some degree along with the available resources. Furthermore, different messages may belong to different service types with different priorities and compete for finite buffer room. In order to guarantee the quality of service, the issues of node selfishness and buffer management should be taken into account in routing algorithms. Consequently, by combining the social properties of node selfishness and degree centrality, we propose an innovative routing algorithm with the buffer management mechanism designed according to message priority. The extensive experiments with the real world traces are conducted and the corresponding simulation results demonstrate that our proposed algorithm can improve the message delivery probability with low network overhead, and performs better than existing routing algorithms.
{"title":"A routing algorithm based on node selfishness and buffer management in delay tolerant networks","authors":"Xiaoqiong Xu, Zhaorong Zhou, Liu Yang, Li Li","doi":"10.1109/WCSP.2015.7341040","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341040","url":null,"abstract":"Recently, great efforts have been devoted to the research of routing algorithms in delay tolerant networks, but existing works mainly focus on the positive social properties to design routing algorithms, in which nodes are supposed to be willing to help others carry and forward messages, few involve the negative social properties, such as selfishness. However, in reality, the resources of mobile nodes are limited, and helping others to carry and forward messages result in resource depletion. Therefore, mobile nodes behave selfishly to some degree along with the available resources. Furthermore, different messages may belong to different service types with different priorities and compete for finite buffer room. In order to guarantee the quality of service, the issues of node selfishness and buffer management should be taken into account in routing algorithms. Consequently, by combining the social properties of node selfishness and degree centrality, we propose an innovative routing algorithm with the buffer management mechanism designed according to message priority. The extensive experiments with the real world traces are conducted and the corresponding simulation results demonstrate that our proposed algorithm can improve the message delivery probability with low network overhead, and performs better than existing routing algorithms.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"16 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":"116694838","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/WCSP.2015.7341253
C. Xu, Hongming Zhang
Solar-blind ultraviolet (UV) scattering communication is capable of providing non-line-of-sight (NLOS) connectivity for separated transceivers. In NLOS scattering channels, the performances of communications are influenced by different shapes of obstacles. In this paper, we propose several Monte-Carlo based scattering channel models related to different geometries to study the effects of obstacles on UV scattering communications. Simulation results reveal the relationships among the channel path loss, the geometry of obstacles, the transmission distance and the transceivers pointing directions. Different from the previous studies which conclude that shorter communication distance and smaller elevation angles produce a lower path loss, we find that the optimum choices of distance and elevation angles depend on the shapes and the positions of the obstacles in the scattering channels.
{"title":"Monte-Carlo based modeling for ultraviolet non-line-of-sight communication channels with typical obstacles","authors":"C. Xu, Hongming Zhang","doi":"10.1109/WCSP.2015.7341253","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341253","url":null,"abstract":"Solar-blind ultraviolet (UV) scattering communication is capable of providing non-line-of-sight (NLOS) connectivity for separated transceivers. In NLOS scattering channels, the performances of communications are influenced by different shapes of obstacles. In this paper, we propose several Monte-Carlo based scattering channel models related to different geometries to study the effects of obstacles on UV scattering communications. Simulation results reveal the relationships among the channel path loss, the geometry of obstacles, the transmission distance and the transceivers pointing directions. Different from the previous studies which conclude that shorter communication distance and smaller elevation angles produce a lower path loss, we find that the optimum choices of distance and elevation angles depend on the shapes and the positions of the obstacles in the scattering channels.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"60 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":"115416263","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/WCSP.2015.7341189
Yunqiang Bi, Zhiqiang He, Weipeng Jiang, K. Niu, Y. Rong
In underwater acoustic (UWA) communication, Doppler effect is particularly severe due to the slow velocity of sound and the complex variant UWA channel environment. Carrier frequency offset (CFO) can result in extension and compression of the received signal in time domain and has a direct effect on the performance of decoding. In this paper, we propose a new scheme of CFO estimation and compensation for a high speed UWA communication system. There are three steps including coarse CFO estimation, fine CFO estimation and linear interpolation, which are taken to estimate and compensate the CFO. The scheme can eliminate the phenomenon of ambiguous phase and tolerate quick random variation of the CFO in UWA channel. A UWA communication experiment was carried out in December 2012 in the Indian Ocean, off Rottnest Island, Western Australia. With the proposed algorithm in this paper, the UWA system can achieve an average of 1.95% uncoded BER with QPSK modulation at the 1km range and 5.57% with BPSK at the 10km range.
{"title":"Design and experiment of frequency offset estimation and compensation in high-speed underwater acoustic communication","authors":"Yunqiang Bi, Zhiqiang He, Weipeng Jiang, K. Niu, Y. Rong","doi":"10.1109/WCSP.2015.7341189","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341189","url":null,"abstract":"In underwater acoustic (UWA) communication, Doppler effect is particularly severe due to the slow velocity of sound and the complex variant UWA channel environment. Carrier frequency offset (CFO) can result in extension and compression of the received signal in time domain and has a direct effect on the performance of decoding. In this paper, we propose a new scheme of CFO estimation and compensation for a high speed UWA communication system. There are three steps including coarse CFO estimation, fine CFO estimation and linear interpolation, which are taken to estimate and compensate the CFO. The scheme can eliminate the phenomenon of ambiguous phase and tolerate quick random variation of the CFO in UWA channel. A UWA communication experiment was carried out in December 2012 in the Indian Ocean, off Rottnest Island, Western Australia. With the proposed algorithm in this paper, the UWA system can achieve an average of 1.95% uncoded BER with QPSK modulation at the 1km range and 5.57% with BPSK at the 10km range.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"29 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":"115633526","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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