Cooperative diversity schemes for uplink single-carrier FDMA systems

doi:10.1016/j.dsp.2010.10.002

Digital Signal Processing

Volume 21, Issue 2, March 2011, Pages 320-331

https://doi.org/10.1016/j.dsp.2010.10.002 Get rights and content

Abstract

Single-carrier frequency division multiple access (SC-FDMA) is considered as a promising technique that is adopted in the uplink for the upcoming 3GPP long term evolution (LTE). This is because it keeps most of the advantages of OFDMA in addition to low peak to average power ratio (PAPR). Designing diversity achieving schemes for SC-FDMA is a challenging task. The code should not affect the PAPR among other constraints. In this paper, we propose cooperative diversity schemes for SC-FDMA systems. Specifically, distributed space–time/frequency codes are proposed. The proposed distributed space–frequency code (DSFC) takes into account the low PAPR which is the feature of the system. Both decode-and-forward (DAF) and amplify-and-forward (AAF) protocols are considered. Erroneous decoding at the relay node is taken into account. Moreover, we propose a bandwidth efficient distributed space–time code (DSTC) for slow fading relay channels with DAF. Analytical and simulation results indicate that the proposed schemes achieve full diversity at the expense of small performance loss compared to the proposed codes in the literature.

Section snippets

Azzam Y. Al-nahari received the B.Sc. degree in electronics and communications engineering from the University of Technology, Baghdad, Iraq. He received the M.S. degree in electrical communications from the Faculty of Electronic Engineering, Menoufia University, Egypt in 2008. He is currently working towards his Ph.D. degree in electrical and communications engineering. His current research interests include MIMO, OFDM, cooperative communications and signal processing for wireless

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Cited by (4)

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Since these ICIs aggravate the QoS of the cell border users, it becomes necessary to develop an efficient resource management technique for mitigating the ICI [13]. Recently, resource management schemes have been studied in order to improve both QoS and capacity (particularly at the cell border) over orthogonal frequency-division multiplexing (OFDM)-based wireless networks [14–17]. However, it is difficult to find resource management schemes for multicast service, particularly for video application, even if they are able to enhance the QoS of the unicast services.
Systems that broadcast/multicast over cellular networks have recently been intensively investigated. When compared to conventional terrestrial or satellite broadcasting systems, the Quality of Service (QoS) experienced by edge users is an important issue due to the inevitable inter-cell interference (ICI) that occurs within multi-cell environments. In order to resolve this issue, we have developed cooperative sub-band allocation (CSA) and CSA-joint transmission (CSA-JT) techniques that operate as a function of defined visual importance levels assigned to multi-layer videos, where the number of service users is limited over the macro/micro cell environment. To ensure that an acceptable level of video quality is delivered to edge users, an adaptive sub-band allocation scheme for layered video is designed to enhance the overall experience for all users based on maintaining program fairness. In a multiple-input/multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) system, CSA can effectively mitigate ICI at the cell border via base station (BS) cooperation. Moreover, CSA-JT can improve the QoS for cell border users via joint transmission among the cooperating BSs. In order to achieve the delivery of optimal visual quality, an optimization problem is formulated that seeks to maximize the sum experience of the multicast users. A dual decomposition technique is applied in order to reduce the computational complexity of the system. Simulation results show that the CSA and CSA-JT algorithms exhibit a remarkable reduction of outage probability.
Realizing high-accuracy transmission in high-rate data broadcasting networks with heterogeneous users via cooperative communication
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In [13], two basic modes of cooperative communications, namely, decode-and-forward (DF) and amplify-and-forward (AF), are examined for practical systems and their pros and cons are discussed. In [14–16], various coding and decoding techniques for cooperation are proposed to improve the capacity or data quality of a specific user. In [14], a high-performance cooperative maximum-ratio-combining (C-MRC) demodulator is developed for single-antenna relays to cooperate in the DF mode.
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Fathi E. Abd El-Samie received the B.Sc. (Honors), M.Sc., and Ph.D. degrees from the Faculty of Electronic Engineering, Menoufia University, Menouf, Egypt, in 1998, 2001, and 2005, respectively. He joined the teaching staff of the Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University, Menouf, Egypt, in 2005. He is a co-author of about 100 papers in national and international conference proceedings and journals. He has received the most cited paper award from Digital Signal Processing journal for 2008. His current research areas of interest include image enhancement, image restoration, image interpolation, superresolution reconstruction of images, data hiding, multimedia communications, medical image processing, optical signal processing, and digital communications

Moawad I. Dessouky received the B.Sc. (Honors) and M.Sc. degrees from the Faculty of Electronic Engineering, Menoufia University, Menouf, Egypt, in 1976 and 1981, respectively, and the Ph.D. from McMaster University, Canada, in 1986. He joined the teaching staff of the Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University, Menouf, Egypt, in 1986. He has published more than 140 scientific papers in national and international conference proceedings and journals. He is currently the head of the Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University. He has received the most cited paper award from Digital Signal Processing journal for 2008. His current research areas of interest include spectral estimation techniques, image enhancement, image restoration, superresolution reconstruction of images, satellite communications, and spread spectrum techniques.

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Cooperative diversity schemes for uplink single-carrier FDMA systems

Abstract

Section snippets

Orthogonal division multiple access and its application to CATV networks

Eur. Trans. Telecommun. (ETT)

Designing a mobile broadband wireless access network

IEEE Signal Process. Mag.

Single carrier FDMA for uplink wireless transmission

IEEE Vehicular Technol. Mag.

User cooperation diversity-Part II: Implementation aspects and performance analysis

IEEE Trans. Commun.