Pub Date : 2015-12-03DOI: 10.1109/WCSP.2015.7341306
Yi Li, Xianfu Lei, P. Fan, Dageng Chen
In future 5G wireless networks, inter-cell interference (ICI) is perceived as one of the most critical performance bottlenecks. Traditionally, the interference is treated as an additional source of noise, recent advances in information theory show that interference is not necessarily an opponent, but might be decoded and cancelled to obtain a larger capacity region. In this paper, a sparse code multiple access (SCMA) based uplink ICI cancellation technique is proposed to enhance the performance of the cell-edge users by jointly decoding the desired signal and the interference signal at the base stations. Unlike the orthogonal transmission schemes such as fractional frequency reuse in 4G, the proposed non-orthogonal SCMA-based scheme allows several cell-edge users to share the same time-frequency resource blocks (RBs). The sparse codewords are designed to make each user spread its data on a small set of RBs to achieve frequency and interference diversity, and make the near-optimal detection feasible with moderate complexity through iterative message passing algorithm (MPA). Then an open-loop MIMO transmission scheme which combines SCMA with Alamouti code is proposed to achieve full space-time-frequency diversity. Simulation results show that when there is no correlation among resource blocks and the antenna configuration is 1×1, the proposed SCMA-based scheme has about 2dB gain for uplink cell-edge users in multi-cell scenario compared with the FFR-based ICI coordination scheme in LTE networks. The gain becomes larger when combined with the existing MIMO technique. In addition, the SCMA-based scheme is also proved to be more robust to the burst interference.
{"title":"An SCMA-based uplink inter-cell interference cancellation technique for 5G wireless systems","authors":"Yi Li, Xianfu Lei, P. Fan, Dageng Chen","doi":"10.1109/WCSP.2015.7341306","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341306","url":null,"abstract":"In future 5G wireless networks, inter-cell interference (ICI) is perceived as one of the most critical performance bottlenecks. Traditionally, the interference is treated as an additional source of noise, recent advances in information theory show that interference is not necessarily an opponent, but might be decoded and cancelled to obtain a larger capacity region. In this paper, a sparse code multiple access (SCMA) based uplink ICI cancellation technique is proposed to enhance the performance of the cell-edge users by jointly decoding the desired signal and the interference signal at the base stations. Unlike the orthogonal transmission schemes such as fractional frequency reuse in 4G, the proposed non-orthogonal SCMA-based scheme allows several cell-edge users to share the same time-frequency resource blocks (RBs). The sparse codewords are designed to make each user spread its data on a small set of RBs to achieve frequency and interference diversity, and make the near-optimal detection feasible with moderate complexity through iterative message passing algorithm (MPA). Then an open-loop MIMO transmission scheme which combines SCMA with Alamouti code is proposed to achieve full space-time-frequency diversity. Simulation results show that when there is no correlation among resource blocks and the antenna configuration is 1×1, the proposed SCMA-based scheme has about 2dB gain for uplink cell-edge users in multi-cell scenario compared with the FFR-based ICI coordination scheme in LTE networks. The gain becomes larger when combined with the existing MIMO technique. In addition, the SCMA-based scheme is also proved to be more robust to the burst interference.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"53 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":"130641830","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.2015.7341011
Qiuyan Tao, Jianing Li, Lianghao Wang, Ming Zhang
Built-in post refocus applications begin to appear in cameras of new phone models. Most of them rely on dual or even customized cameras. In this paper, we proposed a solution of post refocus using a single uncalibrated cellphone camera. The input is a short video clip with minor camera movement, which is commonly caused by nature shaking of hand. After using feature matching to find a reference plane, the parallax of multiple frames will be revised based on the transformation of reference plane and a factorization method is used to recover the relative depth map. Finally, plausible refocus images can be obtained according to the relative depth map. Our solution has no reliance on any specialized lens and can generate adjustable refocus effect, in both focal depth and the degree of out-of-focus.
{"title":"Relative depth estimation with an uncalibrated camera for image refocus","authors":"Qiuyan Tao, Jianing Li, Lianghao Wang, Ming Zhang","doi":"10.1109/WCSP.2015.7341011","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341011","url":null,"abstract":"Built-in post refocus applications begin to appear in cameras of new phone models. Most of them rely on dual or even customized cameras. In this paper, we proposed a solution of post refocus using a single uncalibrated cellphone camera. The input is a short video clip with minor camera movement, which is commonly caused by nature shaking of hand. After using feature matching to find a reference plane, the parallax of multiple frames will be revised based on the transformation of reference plane and a factorization method is used to recover the relative depth map. Finally, plausible refocus images can be obtained according to the relative depth map. Our solution has no reliance on any specialized lens and can generate adjustable refocus effect, in both focal depth and the degree of out-of-focus.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"118 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":"133306127","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.2015.7341217
Jianfeng Shi, Li Tao, Ming Chen, Zhaohui Yang
We investigate power control problem for cooperative relaying in the device-to-device (D2D) system underlaying cellular networks. Specifically, we consider the D2D communication assisted by fixed-location relays in interference existing circumstance. Therefore, an effective power control scheme is of great importance to suppress interference between D2D and cellular communications which can improve the total system throughput and spectral efficiency. In this paper, we formulate a power control optimization problem for cellular communication and a simple on-off power control algorithm for D2D communications. We also obtain analytic expression for the coverage probability of cellular link using stochastic geometry according to proposed algorithm. Simulation results follow to show the rate of both cellular and D2D links in the various number of D2D transceivers.
{"title":"Power control for relay-assisted device-to-device communication underlaying cellular networks","authors":"Jianfeng Shi, Li Tao, Ming Chen, Zhaohui Yang","doi":"10.1109/WCSP.2015.7341217","DOIUrl":"https://doi.org/10.1109/WCSP.2015.7341217","url":null,"abstract":"We investigate power control problem for cooperative relaying in the device-to-device (D2D) system underlaying cellular networks. Specifically, we consider the D2D communication assisted by fixed-location relays in interference existing circumstance. Therefore, an effective power control scheme is of great importance to suppress interference between D2D and cellular communications which can improve the total system throughput and spectral efficiency. In this paper, we formulate a power control optimization problem for cellular communication and a simple on-off power control algorithm for D2D communications. We also obtain analytic expression for the coverage probability of cellular link using stochastic geometry according to proposed algorithm. Simulation results follow to show the rate of both cellular and D2D links in the various number of D2D transceivers.","PeriodicalId":164776,"journal":{"name":"2015 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"46 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":"133460628","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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