Abstract
Multiple antenna systems that adapt to the channel conditions are known to provide numerous rate and reliability benefits. In frequency division duplexing, the transmitter typically learns about the channel conditions using a small amount of feedback (called limited feedback) sent on the reverse link. While feedback is well studied, there has been only limited work addressing how feedback techniques should be modified depending on the amount of mobility. This paper concerns a signaling scheme for limited feedback multiple antenna wireless communications taking the temporal correlation into account during feedback design. We refer to this as using an adaptive feedback period (AFP) scheme. In the AFP scheme, the transmitter and receiver reuse the past channel state information (CSI) as side information. Feedback to be used for several channel uses is sent from the receiver to the transmitter using a predetermined feedback update period. The feedback update period is determined by characterizing the temporal correlation statistic, so that the proposed AFP scheme outperforms the traditional limited feedback approach, which we refer to as the minimal feedback period (MFP) scheme. To measure the performance, the average effective SNR is considered. Bounds on the feedback update period, correlation coefficient, and feedback rate needed for the AFP scheme to outperform the MFP scheme are derived. Moreover, criteria to initiate the control of the feedback update period are obtained. Results on the average effective SNR are used to develop bounds on the feedback update period using the capacity loss. It is also shown that in the large system limit the feedback update periods required for both the average effective SNR and capacity loss converge to the same bound. These results verify that infrequent high resolution feedback is sometimes preferable to frequent low resolution feedback.
| Original language | English |
|---|---|
| Article number | 5667063 |
| Pages (from-to) | 1654-1669 |
| Number of pages | 16 |
| Journal | IEEE Transactions on Signal Processing |
| Volume | 59 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2011 Apr |
| Externally published | Yes |
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Keywords
- Adaptive feedback rate
- adaptive feedback update period
- multiple-input single-output (MISO) channel
- quantized beamforming
- temporally correlated channel
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Signal Processing
Cite this
Does frequent low resolution feedback outperform infrequent high resolution feedback for multiple antenna beamforming systems? / Kim, Taejoon; Love, David J.; Clercks, Bruno.
In: IEEE Transactions on Signal Processing, Vol. 59, No. 4, 5667063, 04.2011, p. 1654-1669.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Does frequent low resolution feedback outperform infrequent high resolution feedback for multiple antenna beamforming systems?
AU - Kim, Taejoon
AU - Love, David J.
AU - Clercks, Bruno
PY - 2011/4
Y1 - 2011/4
N2 - Multiple antenna systems that adapt to the channel conditions are known to provide numerous rate and reliability benefits. In frequency division duplexing, the transmitter typically learns about the channel conditions using a small amount of feedback (called limited feedback) sent on the reverse link. While feedback is well studied, there has been only limited work addressing how feedback techniques should be modified depending on the amount of mobility. This paper concerns a signaling scheme for limited feedback multiple antenna wireless communications taking the temporal correlation into account during feedback design. We refer to this as using an adaptive feedback period (AFP) scheme. In the AFP scheme, the transmitter and receiver reuse the past channel state information (CSI) as side information. Feedback to be used for several channel uses is sent from the receiver to the transmitter using a predetermined feedback update period. The feedback update period is determined by characterizing the temporal correlation statistic, so that the proposed AFP scheme outperforms the traditional limited feedback approach, which we refer to as the minimal feedback period (MFP) scheme. To measure the performance, the average effective SNR is considered. Bounds on the feedback update period, correlation coefficient, and feedback rate needed for the AFP scheme to outperform the MFP scheme are derived. Moreover, criteria to initiate the control of the feedback update period are obtained. Results on the average effective SNR are used to develop bounds on the feedback update period using the capacity loss. It is also shown that in the large system limit the feedback update periods required for both the average effective SNR and capacity loss converge to the same bound. These results verify that infrequent high resolution feedback is sometimes preferable to frequent low resolution feedback.
AB - Multiple antenna systems that adapt to the channel conditions are known to provide numerous rate and reliability benefits. In frequency division duplexing, the transmitter typically learns about the channel conditions using a small amount of feedback (called limited feedback) sent on the reverse link. While feedback is well studied, there has been only limited work addressing how feedback techniques should be modified depending on the amount of mobility. This paper concerns a signaling scheme for limited feedback multiple antenna wireless communications taking the temporal correlation into account during feedback design. We refer to this as using an adaptive feedback period (AFP) scheme. In the AFP scheme, the transmitter and receiver reuse the past channel state information (CSI) as side information. Feedback to be used for several channel uses is sent from the receiver to the transmitter using a predetermined feedback update period. The feedback update period is determined by characterizing the temporal correlation statistic, so that the proposed AFP scheme outperforms the traditional limited feedback approach, which we refer to as the minimal feedback period (MFP) scheme. To measure the performance, the average effective SNR is considered. Bounds on the feedback update period, correlation coefficient, and feedback rate needed for the AFP scheme to outperform the MFP scheme are derived. Moreover, criteria to initiate the control of the feedback update period are obtained. Results on the average effective SNR are used to develop bounds on the feedback update period using the capacity loss. It is also shown that in the large system limit the feedback update periods required for both the average effective SNR and capacity loss converge to the same bound. These results verify that infrequent high resolution feedback is sometimes preferable to frequent low resolution feedback.
KW - Adaptive feedback rate
KW - adaptive feedback update period
KW - multiple-input single-output (MISO) channel
KW - quantized beamforming
KW - temporally correlated channel
UR - http://www.scopus.com/inward/record.url?scp=79952681136&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79952681136&partnerID=8YFLogxK
U2 - 10.1109/TSP.2010.2099222
DO - 10.1109/TSP.2010.2099222
M3 - Article
AN - SCOPUS:79952681136
VL - 59
SP - 1654
EP - 1669
JO - IEEE Transactions on Signal Processing
JF - IEEE Transactions on Signal Processing
SN - 1053-587X
IS - 4
M1 - 5667063
ER -