Pub Date : 2017-09-01DOI: 10.1109/VTCFall.2017.8288217
Saneeha Ahmed, K. Tepe
In this paper, a trust model is proposed to assess credibility of recommendations in vehicular ad hoc networks (VANETs). In a VANET, nodes share important information with each other. Often these nodes misbehave by sending incorrect information. In order to identify correct information, nodes often use recommendations from their neighbors. However, malicious neighbors may manipulate their recommendations in order to eliminate honest nodes from the network. The trust model provided in this paper will assist nodes to identify such malicious senders and incorrect recommendations. The performance of networks using the proposed trust model is observed to be superior than the existing trust model as suggested by a true positive rate of 0.996 and a false positive rate of 0.001 when malicious senders show selective or probabilistic misbehavior.
{"title":"Recommendation Trust for Improved Malicious Node Detection in Ad Hoc Networks","authors":"Saneeha Ahmed, K. Tepe","doi":"10.1109/VTCFall.2017.8288217","DOIUrl":"https://doi.org/10.1109/VTCFall.2017.8288217","url":null,"abstract":"In this paper, a trust model is proposed to assess credibility of recommendations in vehicular ad hoc networks (VANETs). In a VANET, nodes share important information with each other. Often these nodes misbehave by sending incorrect information. In order to identify correct information, nodes often use recommendations from their neighbors. However, malicious neighbors may manipulate their recommendations in order to eliminate honest nodes from the network. The trust model provided in this paper will assist nodes to identify such malicious senders and incorrect recommendations. The performance of networks using the proposed trust model is observed to be superior than the existing trust model as suggested by a true positive rate of 0.996 and a false positive rate of 0.001 when malicious senders show selective or probabilistic misbehavior.","PeriodicalId":375803,"journal":{"name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126458645","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 : 2017-09-01DOI: 10.1109/VTCFall.2017.8288226
P. Singh, K. Kar, C. Kamhoua
In this work we present a trust computation method, Direct Trust Computation, and utilize it to design a Reputation Routing Model (RRM) for MANETs. We utilize this routing framework to mitigate the effect of blackhole attacks in OLSR without altering the original protocol or increasing its overhead. Our solution can isolate bad nodes in the network and select the most trusted path to route packets. We evaluate the performance of our model by emulating network scenarios on Common Open Research Emulator (CORE) for static as well as dynamic topologies. From our findings, it is observed that RRM substantially outperforms the original OLSR protocol in terms of packet delivery rates in presence of a malicious node, unless the mobility rate is quite high. RRM is therefore useful in mitigating the effect of blackhole attacks in MANETs, particularly in low mobility scenarios.
{"title":"Reputation Routing in MANETs","authors":"P. Singh, K. Kar, C. Kamhoua","doi":"10.1109/VTCFall.2017.8288226","DOIUrl":"https://doi.org/10.1109/VTCFall.2017.8288226","url":null,"abstract":"In this work we present a trust computation method, Direct Trust Computation, and utilize it to design a Reputation Routing Model (RRM) for MANETs. We utilize this routing framework to mitigate the effect of blackhole attacks in OLSR without altering the original protocol or increasing its overhead. Our solution can isolate bad nodes in the network and select the most trusted path to route packets. We evaluate the performance of our model by emulating network scenarios on Common Open Research Emulator (CORE) for static as well as dynamic topologies. From our findings, it is observed that RRM substantially outperforms the original OLSR protocol in terms of packet delivery rates in presence of a malicious node, unless the mobility rate is quite high. RRM is therefore useful in mitigating the effect of blackhole attacks in MANETs, particularly in low mobility scenarios.","PeriodicalId":375803,"journal":{"name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126521322","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 : 2017-09-01DOI: 10.1109/VTCFall.2017.8287879
M. A. Maktoomi, F. Ghannouchi, R. Vyas
In this paper, a novel synthesis technique for dual-frequency rectifier for ambient RF energy harvesting is proposed. For the first time, a fully distributed version of dual-frequency resistance compression network (RCN) is introduced. The proposed RCN utilizes the dual- frequency characteristic of the c-type coupled lines terminated into real impedance. The design technique is fully analytical based on closed-form design equations. Extensive simulations have been carried out to illustrate the proposed idea. The obtained results outperform the earlier reported lumped element network and provides a minimum 10% improvement in the RF-to-DC conversion efficiency at -20 dBm input power. The proposed technique can potentially serve as a starting point for the dual-frequency RF rectifier design.
{"title":"Novel Synthesis of Dual-Frequency RF Energy-Harvesting Rectifier Incorporating Coupled Lines","authors":"M. A. Maktoomi, F. Ghannouchi, R. Vyas","doi":"10.1109/VTCFall.2017.8287879","DOIUrl":"https://doi.org/10.1109/VTCFall.2017.8287879","url":null,"abstract":"In this paper, a novel synthesis technique for dual-frequency rectifier for ambient RF energy harvesting is proposed. For the first time, a fully distributed version of dual-frequency resistance compression network (RCN) is introduced. The proposed RCN utilizes the dual- frequency characteristic of the c-type coupled lines terminated into real impedance. The design technique is fully analytical based on closed-form design equations. Extensive simulations have been carried out to illustrate the proposed idea. The obtained results outperform the earlier reported lumped element network and provides a minimum 10% improvement in the RF-to-DC conversion efficiency at -20 dBm input power. The proposed technique can potentially serve as a starting point for the dual-frequency RF rectifier design.","PeriodicalId":375803,"journal":{"name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125418741","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 : 2017-09-01DOI: 10.1109/VTCFall.2017.8287958
Peng Lin, Yafeng Wang, Daoben Li
Overlapped x domain multiplexing (OVXDM) encoding is recently proposed with ultra-high spectral efficiency by the shift and overlap of weighted data under low signal-to-noise ratio (SNR). However, the decoding performance of OVXDM is restricted by the exponential increase of decoding complexity with the growth of the spectral efficiency. In this paper, we first propose a novel type of turbo-like (TL) structure of OVXDM encoding (TL-OVXDM) combining the advantages of turbo and OVXDM encoding. Then a modified alternating direction method of multipliers with a penalty term (ADMM-penalized) algorithm is proposed, which can achieve robust decoding performance in only a few iterations and significantly reduce the computational complexity of the decoding process through a faster convergence. Simulation results demonstrate that TL-OVXDM with Log-BCJR decoding algorithm can outperform the upper bound of OVXDM bit error probability. And when overlapping fold is relatively high in TL-OVXDM, the proposed ADMM-penalized decoding algorithm quickens the convergence speed and achieves robust performance in bit error rate (BER) with low computational complexity.
{"title":"Fast Converging ADMM-Penalized Algorithm for Turbo-Like OVXDM","authors":"Peng Lin, Yafeng Wang, Daoben Li","doi":"10.1109/VTCFall.2017.8287958","DOIUrl":"https://doi.org/10.1109/VTCFall.2017.8287958","url":null,"abstract":"Overlapped x domain multiplexing (OVXDM) encoding is recently proposed with ultra-high spectral efficiency by the shift and overlap of weighted data under low signal-to-noise ratio (SNR). However, the decoding performance of OVXDM is restricted by the exponential increase of decoding complexity with the growth of the spectral efficiency. In this paper, we first propose a novel type of turbo-like (TL) structure of OVXDM encoding (TL-OVXDM) combining the advantages of turbo and OVXDM encoding. Then a modified alternating direction method of multipliers with a penalty term (ADMM-penalized) algorithm is proposed, which can achieve robust decoding performance in only a few iterations and significantly reduce the computational complexity of the decoding process through a faster convergence. Simulation results demonstrate that TL-OVXDM with Log-BCJR decoding algorithm can outperform the upper bound of OVXDM bit error probability. And when overlapping fold is relatively high in TL-OVXDM, the proposed ADMM-penalized decoding algorithm quickens the convergence speed and achieves robust performance in bit error rate (BER) with low computational complexity.","PeriodicalId":375803,"journal":{"name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125595165","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 : 2017-09-01DOI: 10.1109/VTCFall.2017.8288388
Aditya Mahajan
The problem of assigning priorities for scheduling multiple sensor measurements over a control area network is considered. A dynamic priority allocation scheme is proposed, where priorities are assigned according to the value of information. The value of information is defined as the fee a receiver is willing to pay to access that information. It is shown that the value of information can be computed by solving two Fredholm integral equations. An efficient computation of the value of information is proposed. Numerical examples suggest that the proposed priority assignment scheme outperforms the existing schemes in the literature.
{"title":"Remote Estimation over Control Area Networks","authors":"Aditya Mahajan","doi":"10.1109/VTCFall.2017.8288388","DOIUrl":"https://doi.org/10.1109/VTCFall.2017.8288388","url":null,"abstract":"The problem of assigning priorities for scheduling multiple sensor measurements over a control area network is considered. A dynamic priority allocation scheme is proposed, where priorities are assigned according to the value of information. The value of information is defined as the fee a receiver is willing to pay to access that information. It is shown that the value of information can be computed by solving two Fredholm integral equations. An efficient computation of the value of information is proposed. Numerical examples suggest that the proposed priority assignment scheme outperforms the existing schemes in the literature.","PeriodicalId":375803,"journal":{"name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131390023","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 : 2017-09-01DOI: 10.1109/VTCFall.2017.8288158
Shaoyi Xu, Junlong Li, X. Qin
Deployment of massive machine type communication devices (MTCDs) in the LTE-A network may incur signaling and traffic congestion during the random access (RA) and uplink scheduling. To overcome these problems, a grouping based RA and uplink scheduling scheme is proposed in this paper. The group leader will initiate RA and apply for the uplink transmission resources on behalf of the group members. Specifically, a second group paging scheme is designed to further reduce the access delay and increase the access probability. Implementation details are described in a practical LTE-A system and simulations prove that our proposed approach outperforms the traditional methods with respect to the access probability, access time delay, collision probability and fairness.
在LTE-A网络中部署大量mtcd (machine type communication device)，可能会在RA (random access)和上行调度过程中产生信令和流量拥塞。为了克服这些问题，本文提出了一种基于分组的RA和上行链路调度方案。由组长发起RA，代表组成员申请上行传输资源。具体地说，设计了第二组分页方案，以进一步降低访问延迟，提高访问概率。在一个实际的LTE-A系统中描述了实现细节，仿真结果表明，我们提出的方法在接入概率、接入时延、碰撞概率和公平性方面都优于传统方法。
{"title":"Grouping Based Uplink Resource Allocation for Massive M2M Communications over LTE-A","authors":"Shaoyi Xu, Junlong Li, X. Qin","doi":"10.1109/VTCFall.2017.8288158","DOIUrl":"https://doi.org/10.1109/VTCFall.2017.8288158","url":null,"abstract":"Deployment of massive machine type communication devices (MTCDs) in the LTE-A network may incur signaling and traffic congestion during the random access (RA) and uplink scheduling. To overcome these problems, a grouping based RA and uplink scheduling scheme is proposed in this paper. The group leader will initiate RA and apply for the uplink transmission resources on behalf of the group members. Specifically, a second group paging scheme is designed to further reduce the access delay and increase the access probability. Implementation details are described in a practical LTE-A system and simulations prove that our proposed approach outperforms the traditional methods with respect to the access probability, access time delay, collision probability and fairness.","PeriodicalId":375803,"journal":{"name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131938031","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 : 2017-09-01DOI: 10.1109/VTCFall.2017.8288157
Utku Tefek, Teng Joon Lim
To address massive access in machine-type communication (MTC), we consider in-band full- duplex (IBFD) relays to aggregate MTC packets. IBFD allows devices to receive and transmit concurrently on the same frequency band, potentially doubling the spectral efficiency. On the downside, the use of IBFD raises the interference due to an increased density of simultaneously transmitting nodes. This paper deals with a key trade-off between the increased spectral efficiency and interference in utilizing IBFD uplink relays in a densely deployed MTC network. Using stochastic geometry, we develop a framework to evaluate the end-to-end outage probability and uplink data aggregation rate. The model consists of MTC devices and IBFD relay nodes that forward MTC packets to base stations (BSs) over single-input-multiple-output channels. The BSs employ linear zero-forcing filters to cancel the interference from their associated relay nodes which may transmit simultaneously on the same frequency band. We show the somewhat surprising result that IBFD relaying does not lead to performance gains over half-duplex relays, when devices and relays are independently and homogeneously distributed in space.
{"title":"Full-Duplex SIMO Relaying for Machine-Type Communications in Cellular Networks","authors":"Utku Tefek, Teng Joon Lim","doi":"10.1109/VTCFall.2017.8288157","DOIUrl":"https://doi.org/10.1109/VTCFall.2017.8288157","url":null,"abstract":"To address massive access in machine-type communication (MTC), we consider in-band full- duplex (IBFD) relays to aggregate MTC packets. IBFD allows devices to receive and transmit concurrently on the same frequency band, potentially doubling the spectral efficiency. On the downside, the use of IBFD raises the interference due to an increased density of simultaneously transmitting nodes. This paper deals with a key trade-off between the increased spectral efficiency and interference in utilizing IBFD uplink relays in a densely deployed MTC network. Using stochastic geometry, we develop a framework to evaluate the end-to-end outage probability and uplink data aggregation rate. The model consists of MTC devices and IBFD relay nodes that forward MTC packets to base stations (BSs) over single-input-multiple-output channels. The BSs employ linear zero-forcing filters to cancel the interference from their associated relay nodes which may transmit simultaneously on the same frequency band. We show the somewhat surprising result that IBFD relaying does not lead to performance gains over half-duplex relays, when devices and relays are independently and homogeneously distributed in space.","PeriodicalId":375803,"journal":{"name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132244498","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 : 2017-09-01DOI: 10.1109/VTCFall.2017.8288294
Johan Garcia, Stefan Alfredsson, A. Brunström, C. Beckman
Train-mounted aggregation routers that provide WiFi access to train passengers and bundle external communication over multiple cellular modems/links is an efficient way of providing communication services on trains. However, the characteristics of such systems have received limited attention in the literature. In this paper we address this gap by examining the communication characteristics of such systems based on a large data set gathered over six months from an operational Swedish railway system. We focus our examination on the relationship between per link throughput and train velocity. Using Levenberg- Marquardt non-linear regression a noticeable critical point is observed for an RS-SINR of around 12 dB. At this point the impact of increased train velocity on per link throughput changes from being negative to becoming positive. Using a machine learning approach we also explore the relative importance of several observed metrics in relation to per link throughput.
{"title":"Train Velocity and Data Throughput - A Large Scale LTE Cellular Measurements Study","authors":"Johan Garcia, Stefan Alfredsson, A. Brunström, C. Beckman","doi":"10.1109/VTCFall.2017.8288294","DOIUrl":"https://doi.org/10.1109/VTCFall.2017.8288294","url":null,"abstract":"Train-mounted aggregation routers that provide WiFi access to train passengers and bundle external communication over multiple cellular modems/links is an efficient way of providing communication services on trains. However, the characteristics of such systems have received limited attention in the literature. In this paper we address this gap by examining the communication characteristics of such systems based on a large data set gathered over six months from an operational Swedish railway system. We focus our examination on the relationship between per link throughput and train velocity. Using Levenberg- Marquardt non-linear regression a noticeable critical point is observed for an RS-SINR of around 12 dB. At this point the impact of increased train velocity on per link throughput changes from being negative to becoming positive. Using a machine learning approach we also explore the relative importance of several observed metrics in relation to per link throughput.","PeriodicalId":375803,"journal":{"name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130157095","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 : 2017-09-01DOI: 10.1109/VTCFall.2017.8287921
K. Kimura, Y. Yamao
Blind nonlinear compensation for RF receiver is an important research topic in 5G mobile communication in which concurrent multi-band signals are employed to enable multi-access in heterogeneous networks. Since a nonlinear compensator processes intermodulation bandwidth of more than three times of signal bandwidth, reduction of power consumption is essential. This paper proposed a novel nonlinear compensation technique for receivers, which employs sub-Nyquist sampling A/D conversion. By folding outband spectrum, it achieves similar compensation performance while reducing the sampling speed of A/D converter to less than half of the normal sampling.
{"title":"Blind Nonlinear Compensation for RF Receiver Employing Sub-Nyquist Sampling A/D Conversion","authors":"K. Kimura, Y. Yamao","doi":"10.1109/VTCFall.2017.8287921","DOIUrl":"https://doi.org/10.1109/VTCFall.2017.8287921","url":null,"abstract":"Blind nonlinear compensation for RF receiver is an important research topic in 5G mobile communication in which concurrent multi-band signals are employed to enable multi-access in heterogeneous networks. Since a nonlinear compensator processes intermodulation bandwidth of more than three times of signal bandwidth, reduction of power consumption is essential. This paper proposed a novel nonlinear compensation technique for receivers, which employs sub-Nyquist sampling A/D conversion. By folding outband spectrum, it achieves similar compensation performance while reducing the sampling speed of A/D converter to less than half of the normal sampling.","PeriodicalId":375803,"journal":{"name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130175728","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 : 2017-09-01DOI: 10.1109/VTCFall.2017.8287946
Yunfei Wu, Jincheng Dai, K. Niu, Chao Dong, Xin Bian
Sparse code multiple access (SCMA) has recently emerged as one of the most favorable multiple access schemes for 5G networks, which allows overloading with a large number of users so as to enable massive connectivity. In this paper, we design a hardware framework of a uplink system for SCMA. First, we propose a unified quantization scheme based on density evolution optimization which is independent of signal-to-noise ratios (SNR). Second, we apply a fast convergence message passing algorithm (FC-MPA) in SCMA multiuser detection, in which the function nodes updating and variable nodes updating are processed synchronously so as to make the FC-MPA converge about 2 times faster than standard MPA. Finally, based on FC- MPA, we design a pipelined decoding structure for SCMA so as to increase throughput. FPGA results demonstrate that the fix- point performance achieve a near floating-point performance for different SNR and the pipelined hardware structure we design is feasible.
{"title":"Hardware Design and Implementation of Sparse Code Multiple Access","authors":"Yunfei Wu, Jincheng Dai, K. Niu, Chao Dong, Xin Bian","doi":"10.1109/VTCFall.2017.8287946","DOIUrl":"https://doi.org/10.1109/VTCFall.2017.8287946","url":null,"abstract":"Sparse code multiple access (SCMA) has recently emerged as one of the most favorable multiple access schemes for 5G networks, which allows overloading with a large number of users so as to enable massive connectivity. In this paper, we design a hardware framework of a uplink system for SCMA. First, we propose a unified quantization scheme based on density evolution optimization which is independent of signal-to-noise ratios (SNR). Second, we apply a fast convergence message passing algorithm (FC-MPA) in SCMA multiuser detection, in which the function nodes updating and variable nodes updating are processed synchronously so as to make the FC-MPA converge about 2 times faster than standard MPA. Finally, based on FC- MPA, we design a pipelined decoding structure for SCMA so as to increase throughput. FPGA results demonstrate that the fix- point performance achieve a near floating-point performance for different SNR and the pipelined hardware structure we design is feasible.","PeriodicalId":375803,"journal":{"name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130199676","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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