Pub Date : 2018-08-01DOI: 10.1109/ISWCS.2018.8491042
Zijian Wang, L. Vandendorpe
An energy efficiency (EE) maximization problem with multiple distributed antennas is considered in this paper. Besides the constraint on the total transmit power and per-antenna transmit power constraints, an additional constraint dealing with total weighted power is introduced. Moreover, a Quality-of-Service (QoS) constraint is introduced. Because the original problem is a fractional convex one, Dinkelbach's algorithm is implemented to reformulate the problem. By investigating the Karush- Kuhn- Tucker (KKT) conditions, the mathematical properties of the globally optimal solution are studied and proved, which provides a deeper understanding of the structure of power allocation among antennas. Numerical results demonstrate the effect of QoS on EE and also the structure of power allocation.
{"title":"Power Allocation for Energy Efficiency Optimization in Distributed Antenna Systems","authors":"Zijian Wang, L. Vandendorpe","doi":"10.1109/ISWCS.2018.8491042","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491042","url":null,"abstract":"An energy efficiency (EE) maximization problem with multiple distributed antennas is considered in this paper. Besides the constraint on the total transmit power and per-antenna transmit power constraints, an additional constraint dealing with total weighted power is introduced. Moreover, a Quality-of-Service (QoS) constraint is introduced. Because the original problem is a fractional convex one, Dinkelbach's algorithm is implemented to reformulate the problem. By investigating the Karush- Kuhn- Tucker (KKT) conditions, the mathematical properties of the globally optimal solution are studied and proved, which provides a deeper understanding of the structure of power allocation among antennas. Numerical results demonstrate the effect of QoS on EE and also the structure of power allocation.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134504444","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 : 2018-08-01DOI: 10.1109/ISWCS.2018.8491252
B. Zebbane, M. Chenait
In Wireless Sensor Networks, sensor nodes dissipate energy while sensing, processing, transmitting or receiving data to fulfil the mission required by the application. Measurements have shown that among of these major activities, a sensor node expends maximum energy in data communication. Since the sensor lifetime depends largely on the energy amount of its battery, consumption must be well controlled in order to maximize its lifetime after deployment. Topology control and energy efficient routing are among the most important energy conserving techniques in WSNs. However, research on the relation between topology control based sleep-scheduling and routing is very limited. In this paper, we propose a framework which integrates sleep scheduling-based topology control with multi path routing in order to exploit, more efficiently, the topology resulting after running any topology control protocol. A load balancing mechanism is adopted using a new metric that defines a priority for each path. Simulation results show the effectiveness of the proposed framework in terms of Network lifetime, Energy consumption and Throughput.
{"title":"Integrate Topology Control with Multi Path Routing to Enhance the Sensor Network Lifetime","authors":"B. Zebbane, M. Chenait","doi":"10.1109/ISWCS.2018.8491252","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491252","url":null,"abstract":"In Wireless Sensor Networks, sensor nodes dissipate energy while sensing, processing, transmitting or receiving data to fulfil the mission required by the application. Measurements have shown that among of these major activities, a sensor node expends maximum energy in data communication. Since the sensor lifetime depends largely on the energy amount of its battery, consumption must be well controlled in order to maximize its lifetime after deployment. Topology control and energy efficient routing are among the most important energy conserving techniques in WSNs. However, research on the relation between topology control based sleep-scheduling and routing is very limited. In this paper, we propose a framework which integrates sleep scheduling-based topology control with multi path routing in order to exploit, more efficiently, the topology resulting after running any topology control protocol. A load balancing mechanism is adopted using a new metric that defines a priority for each path. Simulation results show the effectiveness of the proposed framework in terms of Network lifetime, Energy consumption and Throughput.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132131184","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 : 2018-08-01DOI: 10.1109/ISWCS.2018.8491248
Jing Guo, Xiangyun Zhou, S. Durrani, H. Yanikomeroglu
In this paper, we study a multiple access monostatic backscatter communication (BackCom) system, where one reader talks to multiple backscatter nodes (BNs). We propose to use nonorthogonal multiple access (NOMA) to improve the efficiency of BackCom system. Specifically, the reader uses the feedback signal during the training phase to separate the multiple BNs into two groups. The reader then randomly pairs the BNs from these two groups to implement NOMA. We propose to set the reflection coefficients for these two groups differently to further distinguish the reflected signal power for the paired BNs. To characterize the network performance, we derive an analytical expression for the success rate which shows the percentage of bits that can be successfully decoded in one time slot. We also present the design guideline of the reflection coefficients for the two groups to maximize the system performance. Our numerical results show that increasing the readers transmit power has little impact on the system performance when the channel condition on the transmission link is less severe. Instead, the proper choice of the reflection coefficients for the two groups of BNs can greatly enhance the BackCom system.
{"title":"Backscatter communications with NOMA (Invited Paper)","authors":"Jing Guo, Xiangyun Zhou, S. Durrani, H. Yanikomeroglu","doi":"10.1109/ISWCS.2018.8491248","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491248","url":null,"abstract":"In this paper, we study a multiple access monostatic backscatter communication (BackCom) system, where one reader talks to multiple backscatter nodes (BNs). We propose to use nonorthogonal multiple access (NOMA) to improve the efficiency of BackCom system. Specifically, the reader uses the feedback signal during the training phase to separate the multiple BNs into two groups. The reader then randomly pairs the BNs from these two groups to implement NOMA. We propose to set the reflection coefficients for these two groups differently to further distinguish the reflected signal power for the paired BNs. To characterize the network performance, we derive an analytical expression for the success rate which shows the percentage of bits that can be successfully decoded in one time slot. We also present the design guideline of the reflection coefficients for the two groups to maximize the system performance. Our numerical results show that increasing the readers transmit power has little impact on the system performance when the channel condition on the transmission link is less severe. Instead, the proper choice of the reflection coefficients for the two groups of BNs can greatly enhance the BackCom system.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125009504","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 : 2018-08-01DOI: 10.1109/ISWCS.2018.8491061
Elena Peralta, Toni Levanen, T. Ihalainen, Sari Nielsen, M. Ng, M. Renfors, M. Valkama
In this paper, we address and analyze the receiver reference sensitivity requirements for the 5G New Radio (NR) wireless communications systems, which relate to the SNR requirements at the base station to reach 95 % of the maximum throughput defined for fixed reference channels. Based on the latest 3GPP specifications and evaluation assumptions agreed for Release 15, a wide set of different transmission bandwidths and radio interface numerologies are investigated, at sub-6GHz and millimeter-wave frequency ranges, covering both AWGN and fading channel scenarios as well as varying mobility conditions. The performance results in terms of the relative throughput and block error rate using LDPC coding scheme are presented and analyzed, while for comparison purposes also LTE turbo code based results are provided. The results show that in frequency-selective channels, the reference sensitivity and UL radio link performance are systematically better with LDPC code compared to turbo code. The results also indicate that the purely front-loaded demodulation reference signal (DM-RS) based system can outperform the corresponding two DM-RS based system even at higher velocities and high center frequencies, allowing low decoding latency and efficient pipelined receiver processing.
{"title":"5G New Radio Base-Station Sensitivity and Performance","authors":"Elena Peralta, Toni Levanen, T. Ihalainen, Sari Nielsen, M. Ng, M. Renfors, M. Valkama","doi":"10.1109/ISWCS.2018.8491061","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491061","url":null,"abstract":"In this paper, we address and analyze the receiver reference sensitivity requirements for the 5G New Radio (NR) wireless communications systems, which relate to the SNR requirements at the base station to reach 95 % of the maximum throughput defined for fixed reference channels. Based on the latest 3GPP specifications and evaluation assumptions agreed for Release 15, a wide set of different transmission bandwidths and radio interface numerologies are investigated, at sub-6GHz and millimeter-wave frequency ranges, covering both AWGN and fading channel scenarios as well as varying mobility conditions. The performance results in terms of the relative throughput and block error rate using LDPC coding scheme are presented and analyzed, while for comparison purposes also LTE turbo code based results are provided. The results show that in frequency-selective channels, the reference sensitivity and UL radio link performance are systematically better with LDPC code compared to turbo code. The results also indicate that the purely front-loaded demodulation reference signal (DM-RS) based system can outperform the corresponding two DM-RS based system even at higher velocities and high center frequencies, allowing low decoding latency and efficient pipelined receiver processing.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125083696","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 : 2018-08-01DOI: 10.1109/ISWCS.2018.8491223
A. Moawad, K. Yao, A. Mansour, R. Gautier
This paper provides a novel blind spectrum sensing technique based on cepstral analysis in interweave cognitive radio (CR) system. The main scope of this work is to mitigate the problem of weak signal detection so as to allow for interference-free spectrum sharing. The misdetection problem of a possible legitimate user occupies a desired frequency band leads to erroneous sensing results. Based on the periodicity revealing property of cepstral analysis approaches, we formulate a spectrum sensing technique based on the autocepstrum concept. We employ the proposed approach to detect a spread spectrum (SS) primary user (PU) signal. The blind theme of the proposed approach implies that no knowledge of the spreading code employed in a SS signal is provided at the CR receiver. The distribution of the detection test statistic is derived under the null hypothesis based on Neyman-Pearson lemma (NPL). The corresponding detection threshold is analytically computed. The performance of the proposed spectrum sensing algorithm is compared with conventional energy detection (CED) in terms of detection probability. As a result, the proposed detector outperforms CED, and indicates lower misdetection probability in low signal-to-noise (SNR) ratio environment.
{"title":"Autocepstrum Approach for Spectrum Sensing in Cognitive Radio","authors":"A. Moawad, K. Yao, A. Mansour, R. Gautier","doi":"10.1109/ISWCS.2018.8491223","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491223","url":null,"abstract":"This paper provides a novel blind spectrum sensing technique based on cepstral analysis in interweave cognitive radio (CR) system. The main scope of this work is to mitigate the problem of weak signal detection so as to allow for interference-free spectrum sharing. The misdetection problem of a possible legitimate user occupies a desired frequency band leads to erroneous sensing results. Based on the periodicity revealing property of cepstral analysis approaches, we formulate a spectrum sensing technique based on the autocepstrum concept. We employ the proposed approach to detect a spread spectrum (SS) primary user (PU) signal. The blind theme of the proposed approach implies that no knowledge of the spreading code employed in a SS signal is provided at the CR receiver. The distribution of the detection test statistic is derived under the null hypothesis based on Neyman-Pearson lemma (NPL). The corresponding detection threshold is analytically computed. The performance of the proposed spectrum sensing algorithm is compared with conventional energy detection (CED) in terms of detection probability. As a result, the proposed detector outperforms CED, and indicates lower misdetection probability in low signal-to-noise (SNR) ratio environment.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122953892","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 : 2018-08-01DOI: 10.1109/ISWCS.2018.8491204
Roy Karasik, O. Simeone, S. Shamai
In a Fog-Radio Access Network (F-RAN), edge caching and fronthaul connectivity to a cloud processor are utilized for the purpose of content delivery. Additional Device-to-Device (D2D) communication capabilities can support the operation of an F - RAN by alleviating fronthaul and cloud processing load, and reducing the delivery time. In this work, basic limits on the normalized delivery time (NDT) metric, which captures the high signal-to-noise ratio worst-case latency for delivering any requested content to the users, are derived. Assuming proactive offline caching, out-of-band D2D communication, and an F-RAN with two edge nodes and two users, an information-theoretically optimal caching and delivery strategy is presented. Unlike prior work, the NDT performance is studied under pipelined transmission, whereby the edge nodes transmit on the wireless channel while simultaneously receiving messages over the fronthaul links, and the users transmit messages over the D2D links while at the same time receiving on the wireless channel. Insights are provided on the regimes in which D2D communication is beneficial, and the maximum improvement to the latency is characterized.
{"title":"Information- Theoretic Analysis of D2D-Aided Pipelined Content Delivery in Fog-RAN","authors":"Roy Karasik, O. Simeone, S. Shamai","doi":"10.1109/ISWCS.2018.8491204","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491204","url":null,"abstract":"In a Fog-Radio Access Network (F-RAN), edge caching and fronthaul connectivity to a cloud processor are utilized for the purpose of content delivery. Additional Device-to-Device (D2D) communication capabilities can support the operation of an F - RAN by alleviating fronthaul and cloud processing load, and reducing the delivery time. In this work, basic limits on the normalized delivery time (NDT) metric, which captures the high signal-to-noise ratio worst-case latency for delivering any requested content to the users, are derived. Assuming proactive offline caching, out-of-band D2D communication, and an F-RAN with two edge nodes and two users, an information-theoretically optimal caching and delivery strategy is presented. Unlike prior work, the NDT performance is studied under pipelined transmission, whereby the edge nodes transmit on the wireless channel while simultaneously receiving messages over the fronthaul links, and the users transmit messages over the D2D links while at the same time receiving on the wireless channel. Insights are provided on the regimes in which D2D communication is beneficial, and the maximum improvement to the latency is characterized.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128561198","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 : 2018-08-01DOI: 10.1109/ISWCS.2018.8491215
Andreia Pereira, Pedro Bento, M. Gomes, R. Dinis, V. Silva
This paper considers multiple-input multiple-output (MIMO) schemes employing the recently proposed time-interleaved block windowed burst-OFDM (TIBWB-OFDM) modulation combined with frequency-domain receivers based on the iterative block decision feedback equalization (IB-DFE) principle, concerning an uplink transmission. It is shown that TIBWB-OFDM technique is easily combined with MIMO systems, allowing efficient spectral usage with low out-of-band (OOB) emissions as well as gains in terms of power efficiency. In addition, its additional diversity associated with the capabilities of the powerful IB-DFE equalizer, that although requiring matrix inversions, it can provide excellent results, makes this combination of techniques interesting for scenarios with moderate number of antenna-elements, where the complexity can be manageable.
{"title":"MIMO Time-Interleaved Block Windowed Burst OFDM with Iterative Frequency Domain Equalization","authors":"Andreia Pereira, Pedro Bento, M. Gomes, R. Dinis, V. Silva","doi":"10.1109/ISWCS.2018.8491215","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491215","url":null,"abstract":"This paper considers multiple-input multiple-output (MIMO) schemes employing the recently proposed time-interleaved block windowed burst-OFDM (TIBWB-OFDM) modulation combined with frequency-domain receivers based on the iterative block decision feedback equalization (IB-DFE) principle, concerning an uplink transmission. It is shown that TIBWB-OFDM technique is easily combined with MIMO systems, allowing efficient spectral usage with low out-of-band (OOB) emissions as well as gains in terms of power efficiency. In addition, its additional diversity associated with the capabilities of the powerful IB-DFE equalizer, that although requiring matrix inversions, it can provide excellent results, makes this combination of techniques interesting for scenarios with moderate number of antenna-elements, where the complexity can be manageable.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128387012","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 : 2018-08-01DOI: 10.1109/ISWCS.2018.8491097
Erhu Chen, Minghua Xia, S. Aïssa
In this paper, by deploying hybrid relaying nodes (HNs), capable of both, data relaying and power radiation, the technique of wireless power transfer is integrated into legacy wireless communications networks. In particular, applying the nearest-neighbour criterion to associate HNs to base stations, or user equipments (UEs) to HNs, a two-tier hierarchical wireless network is developed. Using stochastic geometry tools, the transmission probability of UEs and the coverage probability of uplink data transmission are investigated. Moreover, to optimize the coverage probability for given densities of UEs and base stations, the optimal HN density is derived. Simulation results demonstrate the effectiveness of the developed analyses.
{"title":"Coverage Probability of Hierarchical Wireless Networks with Hybrid Powering/Relaying Nodes (Invited Paper)","authors":"Erhu Chen, Minghua Xia, S. Aïssa","doi":"10.1109/ISWCS.2018.8491097","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491097","url":null,"abstract":"In this paper, by deploying hybrid relaying nodes (HNs), capable of both, data relaying and power radiation, the technique of wireless power transfer is integrated into legacy wireless communications networks. In particular, applying the nearest-neighbour criterion to associate HNs to base stations, or user equipments (UEs) to HNs, a two-tier hierarchical wireless network is developed. Using stochastic geometry tools, the transmission probability of UEs and the coverage probability of uplink data transmission are investigated. Moreover, to optimize the coverage probability for given densities of UEs and base stations, the optimal HN density is derived. Simulation results demonstrate the effectiveness of the developed analyses.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129005108","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 : 2018-08-01DOI: 10.1109/ISWCS.2018.8491249
Lanfranco Zanzi, Vincenzo Sciancalepore
The upcoming 5th generation (5G) of mobile networks is being designed to significantly improve the performance of the current network deployments by introducing more flexibility and scalability while, at the same time, optimizing the spectrum utilization and energy efficiency of radio communications. Among such novelties, Network Slicing is emerging as the key-concept in the 5G landscape, able to provide the means for the concurrent deployment of heterogeneous services over a common physical network. In this paper, we investigate current technologies, open issues and possible solutions while addressing the most critical requirement envisioned with the advent of advanced services, i.e., the provisioning of stringent end-to-end delay guarantees as a pillar of the novel Ultra Reliable and Low Latency Communication (URLLC) service type.
{"title":"On Guaranteeing End-to-End Network Slice Latency Constraints in 5G Networks","authors":"Lanfranco Zanzi, Vincenzo Sciancalepore","doi":"10.1109/ISWCS.2018.8491249","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491249","url":null,"abstract":"The upcoming 5th generation (5G) of mobile networks is being designed to significantly improve the performance of the current network deployments by introducing more flexibility and scalability while, at the same time, optimizing the spectrum utilization and energy efficiency of radio communications. Among such novelties, Network Slicing is emerging as the key-concept in the 5G landscape, able to provide the means for the concurrent deployment of heterogeneous services over a common physical network. In this paper, we investigate current technologies, open issues and possible solutions while addressing the most critical requirement envisioned with the advent of advanced services, i.e., the provisioning of stringent end-to-end delay guarantees as a pillar of the novel Ultra Reliable and Low Latency Communication (URLLC) service type.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123798383","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 : 2018-08-01DOI: 10.1109/ISWCS.2018.8491090
Mingyang Cui, Wei-chen Zou
Hybrid precoding has been proposed as a promising technology for millimeter wave (mmWave) systems recently. However, the complexity of hybrid precoding for mm Wave multiple-input multiple-output systems is still high. In this paper, we propose a low-complexity joint hybrid precoding algorithm. By introducing the concept of equivalent channel, the hybrid precoding problem can be formulated as the problem of maximizing the gain of the equivalent channel. To solve this problem, we jointly design the radio-frequency precoder and combiner by selecting the appropriate codewords in an orthogonal codebook. Then, we complete the baseband precoder and combiner jointly through the singular value decomposition of the equivalent channel. The simulation results show that comparing with classical orthogonal matching pursuit algorithm, the proposed algorithm could achieve similar performance with much lower complexity. Furthermore, the proposed algorithm will be more efficient with the increase of antennas.
{"title":"Joint Hybrid Precoding Based on Orthogonal Codebook in Millimeter Wave Systems","authors":"Mingyang Cui, Wei-chen Zou","doi":"10.1109/ISWCS.2018.8491090","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491090","url":null,"abstract":"Hybrid precoding has been proposed as a promising technology for millimeter wave (mmWave) systems recently. However, the complexity of hybrid precoding for mm Wave multiple-input multiple-output systems is still high. In this paper, we propose a low-complexity joint hybrid precoding algorithm. By introducing the concept of equivalent channel, the hybrid precoding problem can be formulated as the problem of maximizing the gain of the equivalent channel. To solve this problem, we jointly design the radio-frequency precoder and combiner by selecting the appropriate codewords in an orthogonal codebook. Then, we complete the baseband precoder and combiner jointly through the singular value decomposition of the equivalent channel. The simulation results show that comparing with classical orthogonal matching pursuit algorithm, the proposed algorithm could achieve similar performance with much lower complexity. Furthermore, the proposed algorithm will be more efficient with the increase of antennas.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"6 48","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114044437","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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