Adaptive Precoding for Wireless MIMO Broadcast Channels with Limited Feedback

James (Sungjin) KIM; Hojin KIM; Chang Soon PARK; Kwang Bok LEE

doi:10.1093/ietcom/e88-b.11.4237

Adaptive Precoding for Wireless MIMO Broadcast Channels with Limited Feedback

James (Sungjin) KIM, Hojin KIM, Chang Soon PARK, Kwang Bok LEE

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Recently, a number of techniques have been introduced to exploit multiuser diversity of a wireless multiple-input multiple-output (MIMO) broadcast channel (BC) that consists of a base station with t transmit antennas and K users with multiple antennas. However, prior works have ignored the rate overhead associated with feedback of MIMO BC channel state information at transmitter (CSIT), which is roughly K times larger than single-user MIMO CSIT (i.e., it is O(tr) where r = r_k and r_k is the number of antennas at the kth user). Considering the amount of feedback signaling, quantization is a necessity for effective feedback transmission as a form of partial CSIT. In this paper, we propose the greedy multi-channel selection diversity (greedy MCSD) scheme based on block MMSE QR decomposition with dirty paper coding (block MMSE-DP), where partial CSIT is almost sufficient. The sum-rate performance of our novel scheme approaches extremely close to the sum capacity of MIMO BC as the number of users increases, whereas the feedback overhead is reduced by a factor of 2t³/L(t²-t), in which L is the number of active channel vectors. Simulation results validate the expectation from the analysis. In addition, the proposed scheme is shown to be appropriate for reconfigurable implementation.

Publication: IEICE TRANSACTIONS on Communications Vol.E88-B No.11 pp.4237-4245

Publication Date: 2005/11/01

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DOI: 10.1093/ietcom/e88-b.11.4237

Type of Manuscript: Special Section PAPER (Special Section on Software Defined Radio Technology and Its Applications)

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James (Sungjin) KIM, Hojin KIM, Chang Soon PARK, Kwang Bok LEE, "Adaptive Precoding for Wireless MIMO Broadcast Channels with Limited Feedback" in IEICE TRANSACTIONS on Communications, vol. E88-B, no. 11, pp. 4237-4245, November 2005, doi: 10.1093/ietcom/e88-b.11.4237.
Abstract: Recently, a number of techniques have been introduced to exploit multiuser diversity of a wireless multiple-input multiple-output (MIMO) broadcast channel (BC) that consists of a base station with t transmit antennas and K users with multiple antennas. However, prior works have ignored the rate overhead associated with feedback of MIMO BC channel state information at transmitter (CSIT), which is roughly K times larger than single-user MIMO CSIT (i.e., it is O(tr) where r = r_k and r_k is the number of antennas at the kth user). Considering the amount of feedback signaling, quantization is a necessity for effective feedback transmission as a form of partial CSIT. In this paper, we propose the greedy multi-channel selection diversity (greedy MCSD) scheme based on block MMSE QR decomposition with dirty paper coding (block MMSE-DP), where partial CSIT is almost sufficient. The sum-rate performance of our novel scheme approaches extremely close to the sum capacity of MIMO BC as the number of users increases, whereas the feedback overhead is reduced by a factor of 2t³/L(t²-t), in which L is the number of active channel vectors. Simulation results validate the expectation from the analysis. In addition, the proposed scheme is shown to be appropriate for reconfigurable implementation.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e88-b.11.4237/_p

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@ARTICLE{e88-b_11_4237,
author={James (Sungjin) KIM, Hojin KIM, Chang Soon PARK, Kwang Bok LEE, },
journal={IEICE TRANSACTIONS on Communications},
title={Adaptive Precoding for Wireless MIMO Broadcast Channels with Limited Feedback},
year={2005},
volume={E88-B},
number={11},
pages={4237-4245},
abstract={Recently, a number of techniques have been introduced to exploit multiuser diversity of a wireless multiple-input multiple-output (MIMO) broadcast channel (BC) that consists of a base station with t transmit antennas and K users with multiple antennas. However, prior works have ignored the rate overhead associated with feedback of MIMO BC channel state information at transmitter (CSIT), which is roughly K times larger than single-user MIMO CSIT (i.e., it is O(tr) where r = r_k and r_k is the number of antennas at the kth user). Considering the amount of feedback signaling, quantization is a necessity for effective feedback transmission as a form of partial CSIT. In this paper, we propose the greedy multi-channel selection diversity (greedy MCSD) scheme based on block MMSE QR decomposition with dirty paper coding (block MMSE-DP), where partial CSIT is almost sufficient. The sum-rate performance of our novel scheme approaches extremely close to the sum capacity of MIMO BC as the number of users increases, whereas the feedback overhead is reduced by a factor of 2t³/L(t²-t), in which L is the number of active channel vectors. Simulation results validate the expectation from the analysis. In addition, the proposed scheme is shown to be appropriate for reconfigurable implementation.},
keywords={},
doi={10.1093/ietcom/e88-b.11.4237},
ISSN={},
month={November},}

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TY - JOUR
TI - Adaptive Precoding for Wireless MIMO Broadcast Channels with Limited Feedback
T2 - IEICE TRANSACTIONS on Communications
SP - 4237
EP - 4245
AU - James (Sungjin) KIM
AU - Hojin KIM
AU - Chang Soon PARK
AU - Kwang Bok LEE
PY - 2005
DO - 10.1093/ietcom/e88-b.11.4237
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E88-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2005
AB - Recently, a number of techniques have been introduced to exploit multiuser diversity of a wireless multiple-input multiple-output (MIMO) broadcast channel (BC) that consists of a base station with t transmit antennas and K users with multiple antennas. However, prior works have ignored the rate overhead associated with feedback of MIMO BC channel state information at transmitter (CSIT), which is roughly K times larger than single-user MIMO CSIT (i.e., it is O(tr) where r = r_k and r_k is the number of antennas at the kth user). Considering the amount of feedback signaling, quantization is a necessity for effective feedback transmission as a form of partial CSIT. In this paper, we propose the greedy multi-channel selection diversity (greedy MCSD) scheme based on block MMSE QR decomposition with dirty paper coding (block MMSE-DP), where partial CSIT is almost sufficient. The sum-rate performance of our novel scheme approaches extremely close to the sum capacity of MIMO BC as the number of users increases, whereas the feedback overhead is reduced by a factor of 2t³/L(t²-t), in which L is the number of active channel vectors. Simulation results validate the expectation from the analysis. In addition, the proposed scheme is shown to be appropriate for reconfigurable implementation.
ER -