Recent advances in single‐carrier distributed antenna network

Adachi, Fumiyuki; Takeda, Kazuhisa; Yamamoto, T.; Matsukawa, Ryusuke; Kumagai, Shinya

doi:10.1002/wcm.1212

Cited by 13 publications

(10 citation statements)

References 16 publications

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“…Consider a distributed multiple-input multiple-output (MIMO) system involving several distributed transmitters and a common receiver [1][2][3][4][5][6][7][8]. All the transmitters share the same information to be transmitted.…”

Section: Introductionmentioning

confidence: 99%

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Linear precoding in distributed MIMO systems with partial CSIT

Zhang

Zheng

et al. 2013

EURASIP J. Adv. Signal Process.

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We study the transmission problem in a distributed multiple-input multiple-output (MIMO) system consisting of several distributed transmitters and a common receiver. Assuming partial channel state information at the transmitter (CSIT), we propose a low-cost weighted channel matching and scattering (WCMS) linear precoding strategy. The proposed precoder can be decomposed into two parallel modules: channel matching (CM) and energy scattering. The signals generated by the CM modules from different transmitters provide a coherent gain with improved power efficiency. The use of the scattering modules provides robustness against CSIT uncertainty. By properly combining these two modules, WCMS can achieve coherent gain proportional to the accuracy of the available CSIT as well as robustness against CSIT error. WCMS is simple and fully decentralized and thus is highly suitable for a distributed MIMO system. Numerical results demonstrate that WCMS indeed achieves significant gains in distributed MIMO environments with partial CSIT.

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Section: Introductionmentioning

confidence: 99%

“…The overall system consists of several such local links. Examples of this system can be found in the scenarios such as distributed MIMO systems [1][2][3][4] or parallel relays serving the same destination after recovering the data from the source in relaying systems [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Linear precoding in distributed MIMO systems with partial CSIT

Zhang

Zheng

et al. 2013

EURASIP J. Adv. Signal Process.

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“…Therefore, a high transmit power is required for a user near the cell edge. One attractive solution to improve the transmission quality of the cell edge user is to introduce the distributed antenna network (DAN) [3][4]. In DAN, many antennas are spatially distributed in each cell.…”

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confidence: 99%

Complexity-Reduced Per-Antenna Multiple Access Interference Cancellation for DAN Using DS-CDMA

Shohei

Miyazaki

Adachi

2014

2014 IEEE 80th Vehicular Technology Conference (VTC2014-Fall)

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DS-CDMA allows all accessing users to share the same carrier frequency and hence, can alleviate the sophisticated channel management problem. Recently, we investigated a distributed antenna network (DAN) using direct-sequence code division multiple access (DS-CDMA) with joint antenna diversity and equalization and showed that DAN achieves higher uplink capacity than centralized antenna network (CAN). The uplink capacity is limited due to multiple access interference (MAI). In this paper, to further improve the uplink capacity, we propose a complexityreduced per-antenna MAI cancellation before diversity combining, which is suitable for DAN using DS-CDMA. In the perantenna MAI cancellation, first, interfering users on each antenna are sorted in descending order of the instantaneous received power. Then, a predetermined number of interfering users having the highest received powers are selected on each antenna to be cancelled in the frequency-domain before diversity combining. It is shown by computer simulation that per-antenna MAI cancellation before diversity combining achieves almost the same uplink capacity as full MAI cancellation after diversity combining.

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“…Therefore, a high transmit power is required for a user near the cell edge to meet the required transmission quality, producing large co-channel interference (CCI) to other cells. One attractive solution is to introduce the distributed antenna network (DAN) [1][2][3]. In DAN, many antennas are spatially distributed in each cell.…”

mentioning

confidence: 99%

Uplink capacity and required transmit power of DS-CDMA DAN

Shohei

Miyazaki

Adachi

2013

2013 International Symposium on Intelligent Signal Processing and Communication Systems

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Antenna diversity is a powerful technique to mitigate the impact of multipath fading. In a conventional centralized antenna network (CAN), diversity antennas are co-located at base station and hence, the impacts of the propagation path loss and the shadowing loss cannot be mitigated. Distributed antenna network (DAN) is an effective way to mitigate all of the above impacts. The choice of the multi-access technique is a very important issue. In this paper, we consider broadband DS-CDMA with joint minimum mean square error based frequency domain-equalization (MMSE-FDE)/antenna diversity as the multi-access technique for DAN and investigate the link capacity and required transmit power to compare with CAN. It is shown by the computer simulation that DS-CDMA DAN can reduce the required transmit power for the given bit error rate (BER) and can obtain larger uplink cellular capacity than DS-CDMA CAN.

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Recent advances in single‐carrier distributed antenna network

Cited by 13 publications

References 16 publications

Linear precoding in distributed MIMO systems with partial CSIT

Linear precoding in distributed MIMO systems with partial CSIT

Complexity-Reduced Per-Antenna Multiple Access Interference Cancellation for DAN Using DS-CDMA

Uplink capacity and required transmit power of DS-CDMA DAN

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