University of Hertfordshire

By the same authors

Optimal degrees of freedom for the K user MIMO interference channel even with delayed CSIT

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Standard

Optimal degrees of freedom for the K user MIMO interference channel even with delayed CSIT. / Papazafeiropoulos, Anastasios; Ratnarajah, Tharmalingam.

IEEE Wireless Communications and Networking Conference, WCNC. Institute of Electrical and Electronics Engineers Inc., 2014. p. 543-547 6952086.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Harvard

Papazafeiropoulos, A & Ratnarajah, T 2014, Optimal degrees of freedom for the K user MIMO interference channel even with delayed CSIT. in IEEE Wireless Communications and Networking Conference, WCNC., 6952086, Institute of Electrical and Electronics Engineers Inc., pp. 543-547, 2014 IEEE Wireless Communications and Networking Conference, WCNC 2014, Istanbul, Turkey, 6/04/14. https://doi.org/10.1109/WCNC.2014.6952086

APA

Papazafeiropoulos, A., & Ratnarajah, T. (2014). Optimal degrees of freedom for the K user MIMO interference channel even with delayed CSIT. In IEEE Wireless Communications and Networking Conference, WCNC (pp. 543-547). [6952086] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCNC.2014.6952086

Vancouver

Papazafeiropoulos A, Ratnarajah T. Optimal degrees of freedom for the K user MIMO interference channel even with delayed CSIT. In IEEE Wireless Communications and Networking Conference, WCNC. Institute of Electrical and Electronics Engineers Inc. 2014. p. 543-547. 6952086 https://doi.org/10.1109/WCNC.2014.6952086

Author

Papazafeiropoulos, Anastasios ; Ratnarajah, Tharmalingam. / Optimal degrees of freedom for the K user MIMO interference channel even with delayed CSIT. IEEE Wireless Communications and Networking Conference, WCNC. Institute of Electrical and Electronics Engineers Inc., 2014. pp. 543-547

Bibtex

@inproceedings{f17c05cb40934ea88baa0b60ac7610e2,
title = "Optimal degrees of freedom for the K user MIMO interference channel even with delayed CSIT",
abstract = "Certain practical limitations, such as finite CSI feedback delay, make the knowledge of instantaneous perfect CSI impossible and bring the term of delayed CSIT to the forefront. In this paper, it is described how both current and delayed CSI could be exploited by generalizing the space-time interference alignment transmission algorithm (STIA) to the K (K ≥ 3) user M × N interference channel. Specifically, the degrees of freedom (DoF) gain is characterized as a function of the CSI feedback delay γ and the system parameters (K, M, N). Surprisingly, the DoF become optimal, i.e., no loss is achieved with respect to the case of perfect current CSIT, as far as the normalized CSI feedback delay is less than a specific value dependent on the number of users, and the number of transmit antennas equals to N(K - 1). The proposed algorithm reveals unprecedented properties characterizing the performance of the system by providing the limits of the multiplexing gain with relation to the feedback time delay.",
author = "Anastasios Papazafeiropoulos and Tharmalingam Ratnarajah",
year = "2014",
month = nov,
day = "10",
doi = "10.1109/WCNC.2014.6952086",
language = "English",
pages = "543--547",
booktitle = "IEEE Wireless Communications and Networking Conference, WCNC",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
address = "United States",
note = "2014 IEEE Wireless Communications and Networking Conference, WCNC 2014 ; Conference date: 06-04-2014 Through 09-04-2014",

}

RIS

TY - GEN

T1 - Optimal degrees of freedom for the K user MIMO interference channel even with delayed CSIT

AU - Papazafeiropoulos, Anastasios

AU - Ratnarajah, Tharmalingam

PY - 2014/11/10

Y1 - 2014/11/10

N2 - Certain practical limitations, such as finite CSI feedback delay, make the knowledge of instantaneous perfect CSI impossible and bring the term of delayed CSIT to the forefront. In this paper, it is described how both current and delayed CSI could be exploited by generalizing the space-time interference alignment transmission algorithm (STIA) to the K (K ≥ 3) user M × N interference channel. Specifically, the degrees of freedom (DoF) gain is characterized as a function of the CSI feedback delay γ and the system parameters (K, M, N). Surprisingly, the DoF become optimal, i.e., no loss is achieved with respect to the case of perfect current CSIT, as far as the normalized CSI feedback delay is less than a specific value dependent on the number of users, and the number of transmit antennas equals to N(K - 1). The proposed algorithm reveals unprecedented properties characterizing the performance of the system by providing the limits of the multiplexing gain with relation to the feedback time delay.

AB - Certain practical limitations, such as finite CSI feedback delay, make the knowledge of instantaneous perfect CSI impossible and bring the term of delayed CSIT to the forefront. In this paper, it is described how both current and delayed CSI could be exploited by generalizing the space-time interference alignment transmission algorithm (STIA) to the K (K ≥ 3) user M × N interference channel. Specifically, the degrees of freedom (DoF) gain is characterized as a function of the CSI feedback delay γ and the system parameters (K, M, N). Surprisingly, the DoF become optimal, i.e., no loss is achieved with respect to the case of perfect current CSIT, as far as the normalized CSI feedback delay is less than a specific value dependent on the number of users, and the number of transmit antennas equals to N(K - 1). The proposed algorithm reveals unprecedented properties characterizing the performance of the system by providing the limits of the multiplexing gain with relation to the feedback time delay.

UR - http://www.scopus.com/inward/record.url?scp=84912118166&partnerID=8YFLogxK

U2 - 10.1109/WCNC.2014.6952086

DO - 10.1109/WCNC.2014.6952086

M3 - Conference contribution

AN - SCOPUS:84912118166

SP - 543

EP - 547

BT - IEEE Wireless Communications and Networking Conference, WCNC

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2014 IEEE Wireless Communications and Networking Conference, WCNC 2014

Y2 - 6 April 2014 through 9 April 2014

ER -