Abstract
The performance of spatial multiplexing (SM) multiple-input multiple-output (MIMO) communication systems is highly dependent on the richness of scattering, the presence of dominant components, and the interelement spacings. In this paper, a new interpretation of the impact of transmit correlation on the performance of SM is given based on a so-called "symbol-related array factor." Nonlinear signal constellations for SM over real-world fading channels are then designed by minimizing an estimate of the average symbol error rate under an average transmit power constraint. The new transmission scheme exploits the spectral efficiency advantage of SM and the robustness of eigen-beamforming. Through simulations, it is shown to be more robust against fading correlations and high Ricean K-factors than SM using the classical phase shift keying (PSK) and quadrature amplitude modulation (QAM) constellations. The symbol error rate performance of this scheme is not affected by a change in the propagation environment or the interelement distance. Furthermore, if the scheme is used on the uplink, no explicit rate-consuming feedback link from the base station to the mobile station is required.
| Original language | English |
|---|---|
| Pages (from-to) | 894-902 |
| Number of pages | 9 |
| Journal | IEEE Transactions on Signal Processing |
| Volume | 52 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2004 Apr |
| Externally published | Yes |
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Keywords
- Beamforming
- Correlated channels
- Multiple-input multiple-output (MIMO)
- Space-time coding
- Spatial multiplexing
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Signal Processing
Cite this
Optimization of Nonlinear Signal Constellations for Real-World MIMO Channels. / Clercks, Bruno; Vandendorpe, Luc; Vanhoenacker-Janvier, Danielle; Oestges, Claude.
In: IEEE Transactions on Signal Processing, Vol. 52, No. 4, 04.2004, p. 894-902.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Optimization of Nonlinear Signal Constellations for Real-World MIMO Channels
AU - Clercks, Bruno
AU - Vandendorpe, Luc
AU - Vanhoenacker-Janvier, Danielle
AU - Oestges, Claude
PY - 2004/4
Y1 - 2004/4
N2 - The performance of spatial multiplexing (SM) multiple-input multiple-output (MIMO) communication systems is highly dependent on the richness of scattering, the presence of dominant components, and the interelement spacings. In this paper, a new interpretation of the impact of transmit correlation on the performance of SM is given based on a so-called "symbol-related array factor." Nonlinear signal constellations for SM over real-world fading channels are then designed by minimizing an estimate of the average symbol error rate under an average transmit power constraint. The new transmission scheme exploits the spectral efficiency advantage of SM and the robustness of eigen-beamforming. Through simulations, it is shown to be more robust against fading correlations and high Ricean K-factors than SM using the classical phase shift keying (PSK) and quadrature amplitude modulation (QAM) constellations. The symbol error rate performance of this scheme is not affected by a change in the propagation environment or the interelement distance. Furthermore, if the scheme is used on the uplink, no explicit rate-consuming feedback link from the base station to the mobile station is required.
AB - The performance of spatial multiplexing (SM) multiple-input multiple-output (MIMO) communication systems is highly dependent on the richness of scattering, the presence of dominant components, and the interelement spacings. In this paper, a new interpretation of the impact of transmit correlation on the performance of SM is given based on a so-called "symbol-related array factor." Nonlinear signal constellations for SM over real-world fading channels are then designed by minimizing an estimate of the average symbol error rate under an average transmit power constraint. The new transmission scheme exploits the spectral efficiency advantage of SM and the robustness of eigen-beamforming. Through simulations, it is shown to be more robust against fading correlations and high Ricean K-factors than SM using the classical phase shift keying (PSK) and quadrature amplitude modulation (QAM) constellations. The symbol error rate performance of this scheme is not affected by a change in the propagation environment or the interelement distance. Furthermore, if the scheme is used on the uplink, no explicit rate-consuming feedback link from the base station to the mobile station is required.
KW - Beamforming
KW - Correlated channels
KW - Multiple-input multiple-output (MIMO)
KW - Space-time coding
KW - Spatial multiplexing
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U2 - 10.1109/TSP.2004.823486
DO - 10.1109/TSP.2004.823486
M3 - Article
AN - SCOPUS:1842586112
VL - 52
SP - 894
EP - 902
JO - IEEE Transactions on Signal Processing
JF - IEEE Transactions on Signal Processing
SN - 1053-587X
IS - 4
ER -