The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
기지국(BS)이 다운링크 채널 상태 정보(CSI)를 정확하게 획득할 수 있다는 가정 하에 폐쇄 루프 MIMO 시스템에서 채널 용량의 극적인 이득을 얻을 수 있습니다. 그러나 높은 정밀도로 CSI를 전송하는 것은 업링크 대역폭을 많이 낭비하는 부담이 크며, 제한된 대역폭 내에서 CSI를 전송하는 것은 시스템 성능 저하로 이어진다. 이러한 문제를 해결하기 위해 우리는 하이브리드 파일럿 구조를 기반으로 한 제로 오버헤드 하향링크 CSI 피드백 방식을 제안한다. 다운링크 CSI는 이동 단말(MT) 측의 하이브리드 파일럿에 포함되어 업링크 파일럿 채널을 통해 BS로 피드백되고, BS 측의 하이브리드 파일럿에서 복구됩니다. 한편 업링크 채널은 BS 측의 하이브리드 파일럿을 기반으로 추정됩니다. 하이브리드 파일럿 전송은 기존 코드 분할 다중화 기반 업링크 파일럿 전송과 동일한 대역폭을 차지하므로 추가 업링크 채널 대역폭이 점유되지 않습니다. 따라서 다운링크 CSI 피드백에 대한 오버헤드는 0입니다. 더욱이, 하이브리드 파일럿은 수신된 아날로그 다운링크 파일럿을 업링크 파일럿에 직접 중첩함으로써 MT 측에서 형성된다. 따라서 MT 측에서는 다운링크 CSI 추정 프로세스가 불필요하고 MT의 복잡성이 줄어들 수 있습니다. 수치 시뮬레이션은 제안된 다운링크 CSI 피드백이 기존 피드백 방식보다 더 높은 정밀도를 가지며 다운링크 CSI 피드백에 대한 오버헤드는 0이라는 것을 증명합니다.
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부
Yiheng ZHANG, Qimei CUI, Ping ZHANG, Xiaofeng TAO, "Channel State Information Feedback with Zero-Overhead in Closed-Loop MIMO System" in IEICE TRANSACTIONS on Communications,
vol. E93-B, no. 1, pp. 9-15, January 2010, doi: 10.1587/transcom.E93.B.9.
Abstract: Dramatic gains in channel capacity can be achieved in the closed-loop MIMO system under the assumption that the base station (BS) can acquire the downlink channel state information (CSI) accurately. However, transmitting CSI with high precision is a heavy burden that wastes a lot of uplink bandwidth, while transmitting CSI within a limited bandwidth leads to the degradation of system performance. To address this problem, we propose a zero-overhead downlink CSI feedback scheme based on the hybrid pilot structure. The downlink CSI is contained in the hybrid pilots at mobile terminal (MT) side, fed back to BS via the uplink pilot channel, and recovered from hybrid pilot at BS side. Meanwhile the uplink channel is estimated based on the hybrid pilot at BS side. Since transmitting the hybrid pilots occupies the same bandwidth as transmitting traditional code division multiplexing based uplink pilots, no extra uplink channel bandwidth is occupied. Therefore, the overhead for downlink CSI feedback is zero. Moreover, the hybrid pilots are formed at MT side by superposing the received analog downlink pilots directly on the uplink pilots. Thus the downlink CSI estimation process is unnecessary at MT side, and MT's complexity can be reduced. Numerical Simulations prove that, the proposed downlink CSI feedback has the higher precision than the traditional feedback schemes while the overhead for downlink CSI feedback is zero.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E93.B.9/_p
부
@ARTICLE{e93-b_1_9,
author={Yiheng ZHANG, Qimei CUI, Ping ZHANG, Xiaofeng TAO, },
journal={IEICE TRANSACTIONS on Communications},
title={Channel State Information Feedback with Zero-Overhead in Closed-Loop MIMO System},
year={2010},
volume={E93-B},
number={1},
pages={9-15},
abstract={Dramatic gains in channel capacity can be achieved in the closed-loop MIMO system under the assumption that the base station (BS) can acquire the downlink channel state information (CSI) accurately. However, transmitting CSI with high precision is a heavy burden that wastes a lot of uplink bandwidth, while transmitting CSI within a limited bandwidth leads to the degradation of system performance. To address this problem, we propose a zero-overhead downlink CSI feedback scheme based on the hybrid pilot structure. The downlink CSI is contained in the hybrid pilots at mobile terminal (MT) side, fed back to BS via the uplink pilot channel, and recovered from hybrid pilot at BS side. Meanwhile the uplink channel is estimated based on the hybrid pilot at BS side. Since transmitting the hybrid pilots occupies the same bandwidth as transmitting traditional code division multiplexing based uplink pilots, no extra uplink channel bandwidth is occupied. Therefore, the overhead for downlink CSI feedback is zero. Moreover, the hybrid pilots are formed at MT side by superposing the received analog downlink pilots directly on the uplink pilots. Thus the downlink CSI estimation process is unnecessary at MT side, and MT's complexity can be reduced. Numerical Simulations prove that, the proposed downlink CSI feedback has the higher precision than the traditional feedback schemes while the overhead for downlink CSI feedback is zero.},
keywords={},
doi={10.1587/transcom.E93.B.9},
ISSN={1745-1345},
month={January},}
부
TY - JOUR
TI - Channel State Information Feedback with Zero-Overhead in Closed-Loop MIMO System
T2 - IEICE TRANSACTIONS on Communications
SP - 9
EP - 15
AU - Yiheng ZHANG
AU - Qimei CUI
AU - Ping ZHANG
AU - Xiaofeng TAO
PY - 2010
DO - 10.1587/transcom.E93.B.9
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E93-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2010
AB - Dramatic gains in channel capacity can be achieved in the closed-loop MIMO system under the assumption that the base station (BS) can acquire the downlink channel state information (CSI) accurately. However, transmitting CSI with high precision is a heavy burden that wastes a lot of uplink bandwidth, while transmitting CSI within a limited bandwidth leads to the degradation of system performance. To address this problem, we propose a zero-overhead downlink CSI feedback scheme based on the hybrid pilot structure. The downlink CSI is contained in the hybrid pilots at mobile terminal (MT) side, fed back to BS via the uplink pilot channel, and recovered from hybrid pilot at BS side. Meanwhile the uplink channel is estimated based on the hybrid pilot at BS side. Since transmitting the hybrid pilots occupies the same bandwidth as transmitting traditional code division multiplexing based uplink pilots, no extra uplink channel bandwidth is occupied. Therefore, the overhead for downlink CSI feedback is zero. Moreover, the hybrid pilots are formed at MT side by superposing the received analog downlink pilots directly on the uplink pilots. Thus the downlink CSI estimation process is unnecessary at MT side, and MT's complexity can be reduced. Numerical Simulations prove that, the proposed downlink CSI feedback has the higher precision than the traditional feedback schemes while the overhead for downlink CSI feedback is zero.
ER -