Spectral efficiency of joint multiple cell-site processors for randomly spread DS-CDMA systems

Somekh, Oren; Zaidel, Benjamin M.; Shamai, Shlomo

doi:10.1109/isit.2004.1365319

Cited by 25 publications

(48 citation statements)

References 23 publications

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“…• investigation of the effects of impairments (finite capacity, delay) on the backbone con-36CHAPTER and [8].…”

Section: Perspectives and Discussionmentioning

confidence: 99%

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An Information Theoretic View of Distributed Antenna Processing in Cellular Systems

2007

Wireless Networks and Mobile Communications

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“…• investigation of the effects of impairments (finite capacity, delay) on the backbone con-36CHAPTER and [8].…”

Section: Perspectives and Discussionmentioning

confidence: 99%

“…This model is a first step towards introducing practical constraints on the backbone connecting different APs. In particular, only signals relative to APs within a cluster are jointly processed by the corresponding central processing unit, which is unaware of outer users' codebooks [7] [8]. APs or users.…”

Section: 2mentioning

confidence: 99%

An Information Theoretic View of Distributed Antenna Processing in Cellular Systems

2007

Wireless Networks and Mobile Communications

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“…As shown in [4], this spectral-efficiency is equal to that of the multicell system with M ≥ 3 number of BSs arranged evenly on a circle. Furthermore, it has been demonstrated in [4] that the spectral-efficiency of the multicell systems with circularly distributed BSs is independent of the value of M, provided that M ≥ 3.…”

Section: Optimum Multiuser Detection With Ideal Bs Cooperationmentioning

confidence: 94%

“…The studies demonstrate that intercell interference has a dramatic effect on the achievable spectral-efficiency. Then, the studies in [3] have been extended to a more general model, which employs joint multicell processing (MCP) [4]. In [4], the infinite number of cells are assumed to be divided into clusters, where each cluster has M cells and their M BSs are assumed to cooperate ideally.…”

Section: Introductionmentioning

confidence: 99%

“…Then, the studies in [3] have been extended to a more general model, which employs joint multicell processing (MCP) [4]. In [4], the infinite number of cells are assumed to be divided into clusters, where each cluster has M cells and their M BSs are assumed to cooperate ideally. In [5], the 'soft-handoff ' scenario has been http://jwcn.eurasipjournals.com/content/2013/1/71 considered, where every mobile user simultaneously communicates with two BSs and is jointly controlled by the two BSs.…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of various multiuser detection and base-station cooperation schemes for uplink multicell systems

Yang

Zhang

2013

J Wireless Com Network

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In this contribution, we investigate and compare the spectral-efficiency of uplink multicell systems, when various BS cooperation strategies and detection schemes are employed. Associated with our studies, three base-station (BS) operational schemes are considered, which are the ideal BS cooperation, data exchange only and no BS cooperation, in conjunction with four multiuser detection (MUD) schemes, including the optimum MUD (OMUD), OMUD with parallel interference cancellation (OMUD-PIC), linear minimum mean-square error MUD (MMSE-MUD) and the MMSE-based successive interference cancellation (MMSE-SIC). Their spectral-efficiency is evaluated either by simulations for the multicell systems of limited size or based on the formulas derived by asymptotic analysis. In this article, the asymptotic spectral-efficiency (ASE) of multicell systems with various BS cooperation and MUD schemes is derived based on the asymptotic analysis of the channel autocorrelation matrix's eigenvalue distribution or of the signal-to-interference-plus-noise ratio (SINR) attained by a concerned scheme. The impacts of system load, signal-to-noise ratio (SNR) and intercell interference strength on the spectral-efficiency are demonstrated. Our studies and performance results show that, when taking into account of the trade-off between complexity and performance, the MMSE-SIC supported by data exchange among BSs may constitute a promising multicell processing (MCP) scheme that is beneficial for implementation in practical systems.

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Economic model‐based radio resource management with QoS guarantees in the CDMA uplink

Pei

Zhu

Wang

et al. 2009

Trans Emerging Tel Tech

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SUMMARYIn this paper, radio resource management based on economic model is investigated in detail in the CDMA uplink. A novel economic model is proposed to allocate the radio resources with QoS guarantees in an efficient manner. Firstly, we deduce the resources usage constraint that takes the multi-cell interference power into account in the CDMA uplink. Then a novel utility function is designed to evaluate the total network revenue from the limited radio resources, it considers the factors of both network resources and user preferences such as data rate or signal quality. Under the resources usage constraint of considering multi-cell interference, the radio resource allocation is formulated into an optimisation problem with the objective function of maximising the total network revenue, which is solved to get the optimal transmission rate for each user while guaranteeing the level of signal quality. Numerical results show that approximately more than 20% number of users and another 5% network revenue are achieved according to our resource allocation algorithm compared with traditional ones; meanwhile, signal quality of each mobile user is guaranteed effectively.

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Spectral efficiency of joint multiple cell-site processors for randomly spread DS-CDMA systems

Cited by 25 publications

References 23 publications

An Information Theoretic View of Distributed Antenna Processing in Cellular Systems

An Information Theoretic View of Distributed Antenna Processing in Cellular Systems

Comparative study of various multiuser detection and base-station cooperation schemes for uplink multicell systems

Economic model‐based radio resource management with QoS guarantees in the CDMA uplink

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