IEICE Transactions on Communications

IEICE Transactions on Communications 2008 E91-B(2):479-487; doi:10.1093/ietcom/e91-b.2.479

This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to My Personal Archive Download to citation manager Request Permissions Google Scholar Articles by HARA, Y. Articles by OSHIMA, K. Search for Related Content Social Bookmarking          What's this?

Copyright © 2008 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Papers -- Wireless Communication Technologies

Partial CSI Reporting for Spatial Scheduling in Multiuser MIMO Systems

Yoshitaka HARA¹ and Kazuyoshi OSHIMA²

¹ The author is with Mitsubishi Electric Corporation, Kamakura-shi, 247-8501 Japan. E-mail: Hara.Yoshitaka{at}cs.MitsubishiElectric.co.jp, ² The author is with Mitsubishi Electric Information Technology Centre Europe B.V. (ITE)., 1, allée de Beaulieu, CS 10806, 35708 Rennes Cedex 7, France.

This paper proposes a new partial channel state information (CSI) reporting method for spatial scheduling in TDD/MIMO systems. In the proposed method, a terminal transmits pilot signals using transmit beams which have large channel gains between the base station (BS) and the terminal. Then, the BS can obtain partial CSI through responses of the pilot signals. Furthermore, adaptive allocation of pilot signals is proposed, in which pilot signals for CSI reporting are adaptively allocated to terminals depending on the number of terminals. We evaluate system throughput of spatial scheduling under the partial CSI reporting from multiple terminals. Numerical results show that the proposed method reduces uplink signalling for CSI reporting effectively, keeping high system throughput of spatial scheduling.

Key Words: wireless communications, multiuser MIMO, partial channel state information, spatial scheduling, throughput

---

Manuscript received March 12, 2007. Manuscript revised August 7, 2007.

Reference

[1] Q.H. Spencer, A.L. Swindlehurst, and M. Haardt, "Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels," IEEE Trans. Signal Process., vol.52, no.2, pp.461–471, Feb. 2004.

[2] R.L. Choi and R.D. Murch, "A transmit pre-processing technique for multiuser MIMO systems using a decomposition approach," IEEE Trans. Wireless Commun., vol.3, no.1, pp.20–24, Jan. 2004.

[3] K.K. Wong, R.D. Murch, and K.B. Letaief, "A joint-channel diagonalization for multiuser MIMO antenna systems," IEEE Trans. Wireless Commun., vol.2, no.4, pp.773–786, July 2003.

[4] Y. Hara, L. Brunel, and K. Oshima, "Uplink spatial scheduling with adaptive transmit beamforming in multiuser MIMO systems," Proc. PIMRC'06, Sept. 2006.

[5] Y. Hara, L. Brunel, and K. Oshima, "Downlink spatial scheduling with mutual interference cancellation in multiuser MIMO systems," Proc. PIMRC'06, Sept. 2006.

[6] 3GPP RAN, 3G TS25.212, V5.10.0, June 2005.

[7] D.J. Love, R.W. Heath, Jr., W. Santipach, and M.L. Honig, "What is the value of limited feedback for MIMO channels?," IEEE Commun. Mag., vol.42, no.10, pp.54–59, Oct. 2004.

[8] Y. Hara and K. Oshima, "Pilot-based CSI feedback in TDD/MIMO systems with cochannel interference," Proc. VTC'06 Fall, Sept. 2006.

[9] K. Nishimori, K. Cho, Y. Takatori, and T. Hori, "Automatic calibration method using transmitting signals of an adaptive array for TDD systems," IEEE Trans. Veh. Technol., vol.50, no.6, pp.1636–1640, Nov. 2001.

[10] Y. Hara, A. Taira, and K. Oshima, "OFDMA/TDD/MIMO system with spatial scheduling," Proc. VTC'07 Spring, April 2007.

[11] P. Xia, S. Zhou, and G.B. Giannakis, "Adaptive MIMO-OFDM based on partial channel state information," IEEE Trans. Signal Process., vol.52, no.1, pp.202–213, Jan. 2004.

[12] H. Lee, M. Shin, and C. Lee, "An eigen-based MIMO multiuser scheduler with partial feedback information," IEEE Commun. Lett., vol.9, no.4, pp.328–330, April 2005.

[13] Y. Hara and K. Oshima, "Transmit power control for pilot-based CQI reporting in OFDMA/TDD systems," Proc. PIMRC'07, Sept. 2007.

[14] 3GPP RAN, 3G TR 25.814 V1.2.1, "Physical layer aspects for evolved UTRA (Release 7)," Feb. 2006.

[15] IEEE standard for local and metropolitan area networks Part 16: air interface for fixed and mobile broadband wireless access systems, in IEEE Std 802.16e, Feb. 2006.

CiteULike    Connotea    Del.icio.us    What's this?

This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to My Personal Archive Download to citation manager Request Permissions Google Scholar Articles by HARA, Y. Articles by OSHIMA, K. Search for Related Content Social Bookmarking          What's this?