Power imbalance induced BER performance loss under limited-feedback CoMP techniques

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Power imbalance induced BER performance loss under limited-feedback CoMP techniques. / Haile, Beneyam B.; Hämäläinen, Jyri; Ding, Zhi.

julkaisussa: EURASIP Journal on Wireless Communications and Networking, Vuosikerta 2016, 212, 01.12.2016, s. 1-10.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Bibtex - Lataa

@article{ee59ade670504c52bf7307b43451d132,
title = "Power imbalance induced BER performance loss under limited-feedback CoMP techniques",
abstract = "Coordinated multipoint (CoMP) technology utilizes simultaneous transmission/reception from/to different access points, and it is considered as an important feature to exploit and/or mitigate intercell interference in fourth-generation mobile networks. Yet, channel power imbalance at the receiver is experienced in CoMP systems due to, e.g., spatially distributed transmissions. Traditional co-located multi-antenna systems may also experience power imbalance among antenna branches due to inaccurate antenna calibration. This paper presents a bit error rate (BER) analysis and derives asymptotic and approximate BER expressions for some practical CoMP transmission techniques under channel power imbalance. Besides the analytical results, numerical analysis is made to thoroughly capture the performance impact of channel power imbalance on the performance gain of the CoMP methods. The results demonstrate that power imbalance considerably affects BER performance and applying long-term amplitude information with fast phase feedback has insignificant benefit to effectively compensate the detrimental effect of large channel power imbalance when base stations use a single antenna. In this case, exploiting both short-term amplitude and phase information is a very good choice. On the contrary, for a large number of diversity antennas in base stations, using long-term amplitude information with a sparsely quantized phase shows BER performance close to the case where full channel state information is applied.",
keywords = "Bit error rate, Channel power imbalance, CoMP, Coordinated multipoint, Intercell interference, LTE-advanced, Transmit beamforming",
author = "Haile, {Beneyam B.} and Jyri H{\"a}m{\"a}l{\"a}inen and Zhi Ding",
year = "2016",
month = "12",
day = "1",
doi = "10.1186/s13638-016-0697-y",
language = "English",
volume = "2016",
pages = "1--10",
journal = "EURASIP Journal on Wireless Communications and Networking",
issn = "1687-1472",

}

RIS - Lataa

TY - JOUR

T1 - Power imbalance induced BER performance loss under limited-feedback CoMP techniques

AU - Haile, Beneyam B.

AU - Hämäläinen, Jyri

AU - Ding, Zhi

PY - 2016/12/1

Y1 - 2016/12/1

N2 - Coordinated multipoint (CoMP) technology utilizes simultaneous transmission/reception from/to different access points, and it is considered as an important feature to exploit and/or mitigate intercell interference in fourth-generation mobile networks. Yet, channel power imbalance at the receiver is experienced in CoMP systems due to, e.g., spatially distributed transmissions. Traditional co-located multi-antenna systems may also experience power imbalance among antenna branches due to inaccurate antenna calibration. This paper presents a bit error rate (BER) analysis and derives asymptotic and approximate BER expressions for some practical CoMP transmission techniques under channel power imbalance. Besides the analytical results, numerical analysis is made to thoroughly capture the performance impact of channel power imbalance on the performance gain of the CoMP methods. The results demonstrate that power imbalance considerably affects BER performance and applying long-term amplitude information with fast phase feedback has insignificant benefit to effectively compensate the detrimental effect of large channel power imbalance when base stations use a single antenna. In this case, exploiting both short-term amplitude and phase information is a very good choice. On the contrary, for a large number of diversity antennas in base stations, using long-term amplitude information with a sparsely quantized phase shows BER performance close to the case where full channel state information is applied.

AB - Coordinated multipoint (CoMP) technology utilizes simultaneous transmission/reception from/to different access points, and it is considered as an important feature to exploit and/or mitigate intercell interference in fourth-generation mobile networks. Yet, channel power imbalance at the receiver is experienced in CoMP systems due to, e.g., spatially distributed transmissions. Traditional co-located multi-antenna systems may also experience power imbalance among antenna branches due to inaccurate antenna calibration. This paper presents a bit error rate (BER) analysis and derives asymptotic and approximate BER expressions for some practical CoMP transmission techniques under channel power imbalance. Besides the analytical results, numerical analysis is made to thoroughly capture the performance impact of channel power imbalance on the performance gain of the CoMP methods. The results demonstrate that power imbalance considerably affects BER performance and applying long-term amplitude information with fast phase feedback has insignificant benefit to effectively compensate the detrimental effect of large channel power imbalance when base stations use a single antenna. In this case, exploiting both short-term amplitude and phase information is a very good choice. On the contrary, for a large number of diversity antennas in base stations, using long-term amplitude information with a sparsely quantized phase shows BER performance close to the case where full channel state information is applied.

KW - Bit error rate

KW - Channel power imbalance

KW - CoMP

KW - Coordinated multipoint

KW - Intercell interference

KW - LTE-advanced

KW - Transmit beamforming

UR - http://www.scopus.com/inward/record.url?scp=84986271139&partnerID=8YFLogxK

U2 - 10.1186/s13638-016-0697-y

DO - 10.1186/s13638-016-0697-y

M3 - Article

AN - SCOPUS:84986271139

VL - 2016

SP - 1

EP - 10

JO - EURASIP Journal on Wireless Communications and Networking

JF - EURASIP Journal on Wireless Communications and Networking

SN - 1687-1472

M1 - 212

ER -

ID: 9123187