A radio access system with distributed antennas

Kerpez, K.J.; Ariyavisitakul, S.

doi:10.1109/25.492850

Cited by 107 publications

(35 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By deploying remote antenna ports in coverage holes and connecting them with the home base-stations via dedicated high-speed backhaul links, DAS can cooperatively transmit to user terminals, thereby effectively mitigating detrimental effects such as shadowing and indoor penetration loss [1]. The information theoretical ergodic capacity of DAS has been studied in some recent works.…”

Section: Introductionmentioning

confidence: 99%

Ergodic capacity analysis of downlink distributed antenna systems using stochastic geometry

Lin

2013

2013 IEEE International Conference on Communications (ICC)

View full text Add to dashboard Cite

Abstract-This paper studies the ergodic capacity of a multicell distributed antenna system (DAS), where remote antenna ports are spread within each cell to cooperatively transmit to user terminals. Unlike most prior studies which assume the antenna ports to be deployed at fixed locations, this paper assumes the antenna ports to be distributed as a spatial Poisson point process (PPP) to account for the fact that in practice the antenna ports are randomly placed to cover wherever the dead spots are. We first model DAS within each cell as a downlink multiple-input singleoutput (MISO) channel with per-antenna power constraint while accounting for inter-cell (inter-cluster) interference. Two DAS layouts are considered: the "regular" layout where the antenna ports are randomly deployed within regular cellular boundary to serve a given user, and the "user-centric" layout where the antenna ports are distributed over a wide area and the users choose the surrounding antenna ports to form a "virtual cell" as its own serving antenna subset. Using the tool of stochastic geometry, we analytically derive efficiently computable ergodic capacity expressions for the two layouts of DAS. Using these expressions, the cell-edge capacity of DAS under the regular layout is shown to be upper-bounded by α 2 , where α is the pathloss exponent. Numerical results show that the proposed analytical model can accurately model the first layout, and can well approximate the second layout when the serving radius of users is not large. Compared to the traditional cellular system where all antennas are co-located at the cell center, DAS has better cell-edge performance. Further, the user-centric DAS has higher capacity than the DAS under regular layout.

show abstract

Section: Introductionmentioning

confidence: 99%

Ergodic capacity analysis of downlink distributed antenna systems using stochastic geometry

Lin

2013

2013 IEEE International Conference on Communications (ICC)

View full text Add to dashboard Cite

show abstract

“…Now we attempt to find a feasible suboptimal solution by making some reasonable assumptions in Eq. (7).…”

Section: Carrier Frequency Offset Estimationmentioning

confidence: 99%

Estimation of carrier frequency offsets for MIMO systems with distributed transmit antennas

Deng

Tang

Lei

et al. 2007

J. of Electron.(China)

View full text Add to dashboard Cite

The problem of estimating the carrier frequency offsets in Multiple-Input Multiple-Output (MIMO) systems with distributed transmit antennas is addressed. It is supposed that the transmit antennas are distributed while the receive antennas are still centralized, and the general case where both the time delays and the frequency offsets are possibly different for each transmit antenna is considered. The channel is supposed to be frequency flat, and the macroscopic fading is also taken into consideration. A carrier frequency offset estimator based on Maximum Likelihood (ML) is proposed, which can separately estimate the frequency offset for each transmit antenna and exploit the spatial diversity. The Cramer-Rao Bound (CRB) for synchronous MIMO (i.e., the time delays for each transmit antenna are all equal) is also derived. Simulation results are given to illustrate the performance of the estimator and compare it with the CRB. It is shown that the estimator can provide satisfactory frequency offset estimates and its performance is close to the CRB for the Signal-to-Noise Ratio (SNR) below 20dB.

show abstract

“…Previous works have proved that D-MIMO can improve the link reliability [4], provide an excellent signal quality [5] and enhance the system capacity [6]. Therefore, D-MIMO systems have drawn much research interest in recent years.…”

mentioning

confidence: 99%

Outage Capacity Study of the Distributed MIMO System with Antenna Cooperation

Chen

Wang

Chen

2010

Wireless Pers Commun

View full text Add to dashboard Cite

This letter analyzes the outage capacity of the distributed multi-input multi-output (D-MIMO) systm with antenna cooperation over the Rayleigh-Log-normal fading channel. Firstly, an analytical expression of outage capacity is derived under the cooperative transmission scheme (CTS). Moreover, to optimize the system performance, an adaptive CTS (ACTS) is proposed, and a theoretical expression is derived to perform the ACTS. Simulation results are presented to verify the theoretical outcome.

show abstract

A radio access system with distributed antennas

Cited by 107 publications

References 22 publications

Ergodic capacity analysis of downlink distributed antenna systems using stochastic geometry

Ergodic capacity analysis of downlink distributed antenna systems using stochastic geometry

Estimation of carrier frequency offsets for MIMO systems with distributed transmit antennas

Outage Capacity Study of the Distributed MIMO System with Antenna Cooperation

Contact Info

Product

Resources

About