Pub Date : 2014-04-06DOI: 10.1109/WCNC.2014.6952313
A. Argyriou
In this paper we propose a cooperative protocol and a symbol decoding algorithm that target improved performance in the presence of inter-cell interference (ICI) in wireless cellular networks. Our scheme uses the wireless signals that interfere at relay nodes located at the cell edge instead of discarding them. The relays are non-regenerative and apply a space-time code (STC) to the interfered signal. Subsequently, the relays broadcast the coded signals. At the destinations the interfered and ST-coded signals are decoded in two stages. First by decoding the STC, and then by applying successive interference cancellation (SIC). Simulation results for Rayleigh fading channel reveal significant throughput benefits even in the low SNR regime. We also present results for a small-scale LTE-based cellular scenario and we compare our scheme against the Coordinated MultiPoint (CoMP) transmission mode of LTE-A that is based on beamforming.
{"title":"Interference decoding in cellular wireless relay networks with space-time coding","authors":"A. Argyriou","doi":"10.1109/WCNC.2014.6952313","DOIUrl":"https://doi.org/10.1109/WCNC.2014.6952313","url":null,"abstract":"In this paper we propose a cooperative protocol and a symbol decoding algorithm that target improved performance in the presence of inter-cell interference (ICI) in wireless cellular networks. Our scheme uses the wireless signals that interfere at relay nodes located at the cell edge instead of discarding them. The relays are non-regenerative and apply a space-time code (STC) to the interfered signal. Subsequently, the relays broadcast the coded signals. At the destinations the interfered and ST-coded signals are decoded in two stages. First by decoding the STC, and then by applying successive interference cancellation (SIC). Simulation results for Rayleigh fading channel reveal significant throughput benefits even in the low SNR regime. We also present results for a small-scale LTE-based cellular scenario and we compare our scheme against the Coordinated MultiPoint (CoMP) transmission mode of LTE-A that is based on beamforming.","PeriodicalId":220393,"journal":{"name":"2014 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"10 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120998435","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 : 2014-04-06DOI: 10.1109/WCNC.2014.6953002
Ahmad J. Showail, Kamran Jamshaid, B. Shihada
In this paper, we analyze the impact of large, persistently-full buffers (`bufferbloat') on various network dynamics in IEEE 802.11n wireless networks. Bufferbloat has mostly been studied in the context of wired networks. We study the impact of bufferbloat on a variety of wireless network topologies, including wireless LAN (WLAN) and multi-hop wireless networks. Our results show that a single FTP transfer between two Linux wireless hosts can saturate the buffers in the network stack, leading to RTT delays exceeding 4.5 s in multi-hop configurations. We show that well-designed Aggregate MAC Protocol Data Unit (A-MPDU) MAC-layer frame aggregation can reduce RTT delays while simultaneously increasing network throughput. However, additional measures may still be required to meet the constraints of real-time flows (such as VoIP). Our experiments show that large buffers can deteriorate the fairness in rate allocation in parking lot based multi-hop networks.
{"title":"An empirical evaluation of bufferbloat in IEEE 802.11n wireless networks","authors":"Ahmad J. Showail, Kamran Jamshaid, B. Shihada","doi":"10.1109/WCNC.2014.6953002","DOIUrl":"https://doi.org/10.1109/WCNC.2014.6953002","url":null,"abstract":"In this paper, we analyze the impact of large, persistently-full buffers (`bufferbloat') on various network dynamics in IEEE 802.11n wireless networks. Bufferbloat has mostly been studied in the context of wired networks. We study the impact of bufferbloat on a variety of wireless network topologies, including wireless LAN (WLAN) and multi-hop wireless networks. Our results show that a single FTP transfer between two Linux wireless hosts can saturate the buffers in the network stack, leading to RTT delays exceeding 4.5 s in multi-hop configurations. We show that well-designed Aggregate MAC Protocol Data Unit (A-MPDU) MAC-layer frame aggregation can reduce RTT delays while simultaneously increasing network throughput. However, additional measures may still be required to meet the constraints of real-time flows (such as VoIP). Our experiments show that large buffers can deteriorate the fairness in rate allocation in parking lot based multi-hop networks.","PeriodicalId":220393,"journal":{"name":"2014 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121704286","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}
Network coding improves TCP's performance in lossy wireless networks. However, the complex congestion window evolution of network coded TCP (TCP-NC) makes the analysis of end-to-end throughput challenging. This paper analyzes the evolutionary process of TCP-NC against lossy links. An analytic model is established by applying a two-dimensional Markov chain. With maximum window size, end-to-end erasure rate and redundancy parameter as input parameters, the analytic model can reflect window evolution and calculate end-to-end throughput of TCP-NC precisely. The key point of our model is the novel definition for the states of Markov chain. It substantially reduces related states and much lower complexity is obtained. Our work helps understand the factors that affect TCP-NC's performance and lay the foundation of optimization. Extensive simulations on NS2 show that the analytic model features fairly high accuracy.
{"title":"Analytic throughput model for TCP-NC","authors":"Xiang Lan, Shuang Li, Rui Zhang, Chunnan Han, Sanfeng Zhang","doi":"10.1109/WCNC.2014.6952828","DOIUrl":"https://doi.org/10.1109/WCNC.2014.6952828","url":null,"abstract":"Network coding improves TCP's performance in lossy wireless networks. However, the complex congestion window evolution of network coded TCP (TCP-NC) makes the analysis of end-to-end throughput challenging. This paper analyzes the evolutionary process of TCP-NC against lossy links. An analytic model is established by applying a two-dimensional Markov chain. With maximum window size, end-to-end erasure rate and redundancy parameter as input parameters, the analytic model can reflect window evolution and calculate end-to-end throughput of TCP-NC precisely. The key point of our model is the novel definition for the states of Markov chain. It substantially reduces related states and much lower complexity is obtained. Our work helps understand the factors that affect TCP-NC's performance and lay the foundation of optimization. Extensive simulations on NS2 show that the analytic model features fairly high accuracy.","PeriodicalId":220393,"journal":{"name":"2014 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123870669","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 : 2014-04-06DOI: 10.1109/WCNC.2014.6952122
Dogay Altinel, Günes Karabulut-Kurt
This paper investigates the usage of radio frequency (RF) signal as a source in energy harvesting systems. The open issue in the related literature is the characterization of battery recharging time of an energy harvesting receiver node. RF energy harvesting has challenges due to the wireless propagation environment and conversion efficiency. On the propagation side, the different channel models between source and harvesting node should be taken into account in order to obtain realistic results. The main goal of this paper is to propose statistical models for battery recharging time for the Nakagami-m and the generalized-K fading channels. We also include the effects of lognormal shadowing. We derive the associated closed form probability density function, cumulative distribution function, moment generation function, mean and variance expressions for battery recharging time. The simulations are used to verify the theoretical results.
{"title":"Statistical models for battery recharging time in RF energy harvesting systems","authors":"Dogay Altinel, Günes Karabulut-Kurt","doi":"10.1109/WCNC.2014.6952122","DOIUrl":"https://doi.org/10.1109/WCNC.2014.6952122","url":null,"abstract":"This paper investigates the usage of radio frequency (RF) signal as a source in energy harvesting systems. The open issue in the related literature is the characterization of battery recharging time of an energy harvesting receiver node. RF energy harvesting has challenges due to the wireless propagation environment and conversion efficiency. On the propagation side, the different channel models between source and harvesting node should be taken into account in order to obtain realistic results. The main goal of this paper is to propose statistical models for battery recharging time for the Nakagami-m and the generalized-K fading channels. We also include the effects of lognormal shadowing. We derive the associated closed form probability density function, cumulative distribution function, moment generation function, mean and variance expressions for battery recharging time. The simulations are used to verify the theoretical results.","PeriodicalId":220393,"journal":{"name":"2014 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121580525","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 : 2014-04-06DOI: 10.1109/WCNC.2014.6952161
Mouna Sghaier, F. Abdelkefi, M. Siala
Orthogonal Frequency Division Multiplexing (OFDM) technique is a promising modulation scheme for high performance broadband wireless communications. This technique suffers from a major drawback which is the high Peak to Average Power Ratio (PAPR) of the output signals. In order to resolve this issue, several methods that require the transmission of explicit side information (SI) have been proposed. In this paper, we propose two robust blind techniques that offer the possibility to avoid the transmission of any explicit (SI). First, we investigate a new technique refered as Blind Dummy-Zero-Insertion (DZI) which uses an adequate embedded signaling, consisting of a special matrix mask. Second, in order to enhance the signal detection process and the PAPR gain, we combine the proposed technique with the SLM method as Combined-SLM-DZI. Both methods employ an optimized scheme, during the estimation process, based on calculating the energy of the received signal. Performance evaluation shows the advantage of the proposed methods on the PAPR reduction and also proves the perfect signal recovery at the receiver side.
{"title":"An efficient blind dummy zeros insertion and SLM scheme for PAPR reduction in OFDM systems","authors":"Mouna Sghaier, F. Abdelkefi, M. Siala","doi":"10.1109/WCNC.2014.6952161","DOIUrl":"https://doi.org/10.1109/WCNC.2014.6952161","url":null,"abstract":"Orthogonal Frequency Division Multiplexing (OFDM) technique is a promising modulation scheme for high performance broadband wireless communications. This technique suffers from a major drawback which is the high Peak to Average Power Ratio (PAPR) of the output signals. In order to resolve this issue, several methods that require the transmission of explicit side information (SI) have been proposed. In this paper, we propose two robust blind techniques that offer the possibility to avoid the transmission of any explicit (SI). First, we investigate a new technique refered as Blind Dummy-Zero-Insertion (DZI) which uses an adequate embedded signaling, consisting of a special matrix mask. Second, in order to enhance the signal detection process and the PAPR gain, we combine the proposed technique with the SLM method as Combined-SLM-DZI. Both methods employ an optimized scheme, during the estimation process, based on calculating the energy of the received signal. Performance evaluation shows the advantage of the proposed methods on the PAPR reduction and also proves the perfect signal recovery at the receiver side.","PeriodicalId":220393,"journal":{"name":"2014 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114256283","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 : 2014-04-06DOI: 10.1109/WCNC.2014.6952357
Chiao-En Chen, Jia-Jang Liou
This paper presents two new types of transceiver designs for the multi-cell, multi-user, multiple-input-multiple-output (MIMO) interfering broadcast channel (IBC). In contrast to the existing maximum sum rate and max-min fairness transceiver designs, the proposed designs aim at balancing on the two objectives by maximizing the minimum average sum-rate per cell (type-1) or maximizing the minimum average sum-rate within each cell (type-2). Due to the difficulty of these problems, two iterative suboptimal algorithms which ensure local convergence have been proposed. Simulation results show that the proposed algorithms can provide certain level of fairness guarantee without sacrificing much of the overall system performance. As a result, the proposed designs are in some sense more balanced and can be useful alternatives in addition to the existing designs.
{"title":"New balanced linear transceiver designs for a MIMO interfering broadcast channel","authors":"Chiao-En Chen, Jia-Jang Liou","doi":"10.1109/WCNC.2014.6952357","DOIUrl":"https://doi.org/10.1109/WCNC.2014.6952357","url":null,"abstract":"This paper presents two new types of transceiver designs for the multi-cell, multi-user, multiple-input-multiple-output (MIMO) interfering broadcast channel (IBC). In contrast to the existing maximum sum rate and max-min fairness transceiver designs, the proposed designs aim at balancing on the two objectives by maximizing the minimum average sum-rate per cell (type-1) or maximizing the minimum average sum-rate within each cell (type-2). Due to the difficulty of these problems, two iterative suboptimal algorithms which ensure local convergence have been proposed. Simulation results show that the proposed algorithms can provide certain level of fairness guarantee without sacrificing much of the overall system performance. As a result, the proposed designs are in some sense more balanced and can be useful alternatives in addition to the existing designs.","PeriodicalId":220393,"journal":{"name":"2014 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114282104","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 : 2014-04-06DOI: 10.1109/WCNC.2014.6952205
Djamal E. Berraki, S. Armour, A. Nix
In this paper the use of compressive sensing (CS) to accurately estimate the sparse Power Angle Profile (PAP) of a mmWave propagation channel has been investigated. This scheme is especially attractive for outdoor mmWave applications where large antenna arrays are more likely to be deployed to compensate for high pathloss. Current analogue beamforming techniques such as the codebook based 802.11ad beamforming manifest large beamforming overhead for large antenna arrays of typically 16×16 elements. Measurements in an anechoic chamber were performed to demonstrate the applicability of CS to mmWave PAP estimation. The impact of noise on the estimation of Directions-of-Departure (DoD) using CS theory is analysed and finally the benefit of exploiting the reconstructed PAP in beamforming is assessed and compared to the beam searching algorithm adopted in the IEEE 802.11ad standard.
{"title":"Application of compressive sensing in sparse spatial channel recovery for beamforming in mmWave outdoor systems","authors":"Djamal E. Berraki, S. Armour, A. Nix","doi":"10.1109/WCNC.2014.6952205","DOIUrl":"https://doi.org/10.1109/WCNC.2014.6952205","url":null,"abstract":"In this paper the use of compressive sensing (CS) to accurately estimate the sparse Power Angle Profile (PAP) of a mmWave propagation channel has been investigated. This scheme is especially attractive for outdoor mmWave applications where large antenna arrays are more likely to be deployed to compensate for high pathloss. Current analogue beamforming techniques such as the codebook based 802.11ad beamforming manifest large beamforming overhead for large antenna arrays of typically 16×16 elements. Measurements in an anechoic chamber were performed to demonstrate the applicability of CS to mmWave PAP estimation. The impact of noise on the estimation of Directions-of-Departure (DoD) using CS theory is analysed and finally the benefit of exploiting the reconstructed PAP in beamforming is assessed and compared to the beam searching algorithm adopted in the IEEE 802.11ad standard.","PeriodicalId":220393,"journal":{"name":"2014 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125281462","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 : 2014-04-06DOI: 10.1109/WCNC.2014.6952172
Anastasios K. Papazafeiropoulos, T. Ratnarajah
We consider a multi-cell multi-user downlink channel of a time-division duplex (TDD) MIMO system, where the base stations (BSs) employ the concept of massive MIMO, i.e., they are equipped with a large number of antennas. In addition, the number of users increases with the same speed. Focusing on the practical impairments of the channel such as pilot contamination and, in particular, delayed channel state information at the transmitter (CSIT), we derive an approximation of the sum rate with regularized zero-forcing (RZF) precoding, which provides a quantification of the capacity loss. As a result, it is deemed necessary to obtain the deterministic equivalent sum rate by incorporating in our analysis channel prediction circumventing the degradation due to delayed CSIT. The proposed results are accurate for realistic system dimensions, as simulations testify. Finally, we show the benefits of applying RZF in the sum rate against using eigenbeamforming (BF) for the same Doppler shift with no extra computational complexity.
{"title":"Linear precoding for downlink massive MIMO with delayed CSIT and channel prediction","authors":"Anastasios K. Papazafeiropoulos, T. Ratnarajah","doi":"10.1109/WCNC.2014.6952172","DOIUrl":"https://doi.org/10.1109/WCNC.2014.6952172","url":null,"abstract":"We consider a multi-cell multi-user downlink channel of a time-division duplex (TDD) MIMO system, where the base stations (BSs) employ the concept of massive MIMO, i.e., they are equipped with a large number of antennas. In addition, the number of users increases with the same speed. Focusing on the practical impairments of the channel such as pilot contamination and, in particular, delayed channel state information at the transmitter (CSIT), we derive an approximation of the sum rate with regularized zero-forcing (RZF) precoding, which provides a quantification of the capacity loss. As a result, it is deemed necessary to obtain the deterministic equivalent sum rate by incorporating in our analysis channel prediction circumventing the degradation due to delayed CSIT. The proposed results are accurate for realistic system dimensions, as simulations testify. Finally, we show the benefits of applying RZF in the sum rate against using eigenbeamforming (BF) for the same Doppler shift with no extra computational complexity.","PeriodicalId":220393,"journal":{"name":"2014 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"29 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113973297","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 : 2014-04-06DOI: 10.1109/WCNC.2014.6952930
Mujeeb Ahmed, JongWon Kim
Femtocells are small, low-power, low-cost randomly deployed base stations, which are deployed by end users without proper cell planning or resource optimization. This ad-hoc deployment results in many technical issues that demand an effective solution to exploit the co-channel deployment with macro-cells. One typical problem is cross-tier interference especially at the cell edge where macro user equipments behave as `loud neighbors' and interfere with neighboring femto base stations. In this paper, we attempt a geographically-distributed hybrid access scheme by incorporating the nature of involved interferences. We divide the whole coverage area of a macrocell into two areas, namely inner and outer femtocells. We then propose a virtual-coverage-driven femtocell algorithm to mitigate inter-femtocell interferences along with a context-aware network-assisted handover management scheme to facilitate smooth handoffs among from the macrocell to femtocells. Finally, extensive simulation results are provided to verify the enhancement of proposed scheme for the network-wide user equipment throughput.
{"title":"Context aware network-assisted hand-off management and interference mitigation scheme for heterogeneous networks","authors":"Mujeeb Ahmed, JongWon Kim","doi":"10.1109/WCNC.2014.6952930","DOIUrl":"https://doi.org/10.1109/WCNC.2014.6952930","url":null,"abstract":"Femtocells are small, low-power, low-cost randomly deployed base stations, which are deployed by end users without proper cell planning or resource optimization. This ad-hoc deployment results in many technical issues that demand an effective solution to exploit the co-channel deployment with macro-cells. One typical problem is cross-tier interference especially at the cell edge where macro user equipments behave as `loud neighbors' and interfere with neighboring femto base stations. In this paper, we attempt a geographically-distributed hybrid access scheme by incorporating the nature of involved interferences. We divide the whole coverage area of a macrocell into two areas, namely inner and outer femtocells. We then propose a virtual-coverage-driven femtocell algorithm to mitigate inter-femtocell interferences along with a context-aware network-assisted handover management scheme to facilitate smooth handoffs among from the macrocell to femtocells. Finally, extensive simulation results are provided to verify the enhancement of proposed scheme for the network-wide user equipment throughput.","PeriodicalId":220393,"journal":{"name":"2014 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131540903","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 : 2014-04-06DOI: 10.1109/WCNC.2014.6952202
N. Sagias, R. Mallik, N. Tselikas
We develop an analytical framework for the end-to-end (e2e) asymptotic performance of pilot-symbol assisted Mary phase-shift keying (M-PSK) dual-hop relaying communication networks. The relays use the selective-decode-and-forward protocol and are equipped with multiple receive antennas. Channel estimation per antenna branch is done based on the least-squares estimation technique by means of pilot symbols. Also, maximal-ratio combining and coherent detection are performed at the receiving end. Simple approximate average symbol error probability (ASEP) expressions are obtained for high signal-to-noise ratio (SNR) when M ≥2. Our analysis is generic enough to account for any frequency-flat, time-selective, and/or arbitrarily correlated fading channel model per hop. As a case study, we provide e2e M-PSK ASEP expressions considering arbitrarily correlated Nakagami fading channels. Moreover, the optimal power allocation is studied, while the cooperation-gain and diversity-order are extracted. Numerical results are finally presented to verify the accuracy of our asymptotic expressions.
{"title":"Asymptotic analysis for dual-hop communication networks with PSK and imperfect CSI","authors":"N. Sagias, R. Mallik, N. Tselikas","doi":"10.1109/WCNC.2014.6952202","DOIUrl":"https://doi.org/10.1109/WCNC.2014.6952202","url":null,"abstract":"We develop an analytical framework for the end-to-end (e2e) asymptotic performance of pilot-symbol assisted Mary phase-shift keying (M-PSK) dual-hop relaying communication networks. The relays use the selective-decode-and-forward protocol and are equipped with multiple receive antennas. Channel estimation per antenna branch is done based on the least-squares estimation technique by means of pilot symbols. Also, maximal-ratio combining and coherent detection are performed at the receiving end. Simple approximate average symbol error probability (ASEP) expressions are obtained for high signal-to-noise ratio (SNR) when M ≥2. Our analysis is generic enough to account for any frequency-flat, time-selective, and/or arbitrarily correlated fading channel model per hop. As a case study, we provide e2e M-PSK ASEP expressions considering arbitrarily correlated Nakagami fading channels. Moreover, the optimal power allocation is studied, while the cooperation-gain and diversity-order are extracted. Numerical results are finally presented to verify the accuracy of our asymptotic expressions.","PeriodicalId":220393,"journal":{"name":"2014 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127720502","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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