Abstract
In this paper, we propose new relay transceiver designs based on the minimum mean square error (MMSE) criterion for amplify-and-forward multiple-input-multiple-output (MIMO) relaying systems with direct link. Since each antenna element is equipped with its own power amplifier, a norm power constraint, which restricts the transmit power with the expected norm of the transmit signal vector, is not suitable for practical systems. Therefore, we consider a shaping constraint (SC), which imposes a limit on the shape of the transmit covariance matrix. The SC includes several power constraints such as the peak power constraint and the per-antenna power constraint as special cases. To this end, we first derive the optimal structure of the MMSE relay transceiver under the SC. Then, by introducing an upper bound of the mean square error, we provide closed-form relay transceiver solutions. Due to limited bandwidth of the feedback channel, perfect channel knowledge at the transmitter may not be feasible. Thus, we also propose a quantized relay transceiver design based on Grassmannian codebooks for a limited-feedback scenario. From simulation results, it is confirmed that the proposed relay transceiver techniques demonstrate a significant performance improvement compared with conventional schemes.
| Original language | English |
|---|---|
| Article number | 6862926 |
| Pages (from-to) | 294-304 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Wireless Communications |
| Volume | 14 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2015 Jan 1 |
Fingerprint
Keywords
- direct link
- MIMO systems
- MMSE
- relay
- transceiver design
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Science Applications
- Applied Mathematics
Cite this
Shaping-power-constrained transceiver designs for MIMO AF relaying systems with direct link. / Kong, Han Bae; Song, Changick; Park, Haewook; Lee, Inkyu.
In: IEEE Transactions on Wireless Communications, Vol. 14, No. 1, 6862926, 01.01.2015, p. 294-304.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Shaping-power-constrained transceiver designs for MIMO AF relaying systems with direct link
AU - Kong, Han Bae
AU - Song, Changick
AU - Park, Haewook
AU - Lee, Inkyu
PY - 2015/1/1
Y1 - 2015/1/1
N2 - In this paper, we propose new relay transceiver designs based on the minimum mean square error (MMSE) criterion for amplify-and-forward multiple-input-multiple-output (MIMO) relaying systems with direct link. Since each antenna element is equipped with its own power amplifier, a norm power constraint, which restricts the transmit power with the expected norm of the transmit signal vector, is not suitable for practical systems. Therefore, we consider a shaping constraint (SC), which imposes a limit on the shape of the transmit covariance matrix. The SC includes several power constraints such as the peak power constraint and the per-antenna power constraint as special cases. To this end, we first derive the optimal structure of the MMSE relay transceiver under the SC. Then, by introducing an upper bound of the mean square error, we provide closed-form relay transceiver solutions. Due to limited bandwidth of the feedback channel, perfect channel knowledge at the transmitter may not be feasible. Thus, we also propose a quantized relay transceiver design based on Grassmannian codebooks for a limited-feedback scenario. From simulation results, it is confirmed that the proposed relay transceiver techniques demonstrate a significant performance improvement compared with conventional schemes.
AB - In this paper, we propose new relay transceiver designs based on the minimum mean square error (MMSE) criterion for amplify-and-forward multiple-input-multiple-output (MIMO) relaying systems with direct link. Since each antenna element is equipped with its own power amplifier, a norm power constraint, which restricts the transmit power with the expected norm of the transmit signal vector, is not suitable for practical systems. Therefore, we consider a shaping constraint (SC), which imposes a limit on the shape of the transmit covariance matrix. The SC includes several power constraints such as the peak power constraint and the per-antenna power constraint as special cases. To this end, we first derive the optimal structure of the MMSE relay transceiver under the SC. Then, by introducing an upper bound of the mean square error, we provide closed-form relay transceiver solutions. Due to limited bandwidth of the feedback channel, perfect channel knowledge at the transmitter may not be feasible. Thus, we also propose a quantized relay transceiver design based on Grassmannian codebooks for a limited-feedback scenario. From simulation results, it is confirmed that the proposed relay transceiver techniques demonstrate a significant performance improvement compared with conventional schemes.
KW - direct link
KW - MIMO systems
KW - MMSE
KW - relay
KW - transceiver design
UR - http://www.scopus.com/inward/record.url?scp=84921328038&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84921328038&partnerID=8YFLogxK
U2 - 10.1109/TWC.2014.2342223
DO - 10.1109/TWC.2014.2342223
M3 - Article
AN - SCOPUS:84921328038
VL - 14
SP - 294
EP - 304
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
SN - 1536-1276
IS - 1
M1 - 6862926
ER -