Abstract
Space Division Multiple Access (SDMA) is a promising solution for the significant increase of system capacity and spectral efficiency in Wireless LANs. To make the system more robust against the detrimental effects of frequency selective fading channels, a combined OFDM/SDMA based WLAN has been recently proposed. In particular, it has been shown that MLD (Maximum Likelihood Detection) has the best SNR performance compared with other detection schemes such as LMMSE and SIC (Successive Interference Cancellation) based ones. However, the complexity of MLD increases exponentially in the number of users and constellation size. In this paper, a new multi-stage low complexity MLD scheme using sensitive bits algorithm (SB-MLD) is proposed. It is shown that it can greatly reduce the computational complexity with a minimal penalty in performance compared with the exhaustive MLD scheme.
| Original language | English |
|---|---|
| Pages (from-to) | 1152-1156 |
| Number of pages | 5 |
| Journal | IEEE International Conference on Communications |
| Volume | 4 |
| Publication status | Published - 2001 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering
Cite this
Multi-stage low complexity maximum likelihood detection for OFDM/SDMA wireless LANs. / Li, J.; Letaief, Khaled; Cheng, R. S.; Cao, Z.
In: IEEE International Conference on Communications, Vol. 4, 2001, p. 1152-1156.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Multi-stage low complexity maximum likelihood detection for OFDM/SDMA wireless LANs
AU - Li, J.
AU - Letaief, Khaled
AU - Cheng, R. S.
AU - Cao, Z.
PY - 2001
Y1 - 2001
N2 - Space Division Multiple Access (SDMA) is a promising solution for the significant increase of system capacity and spectral efficiency in Wireless LANs. To make the system more robust against the detrimental effects of frequency selective fading channels, a combined OFDM/SDMA based WLAN has been recently proposed. In particular, it has been shown that MLD (Maximum Likelihood Detection) has the best SNR performance compared with other detection schemes such as LMMSE and SIC (Successive Interference Cancellation) based ones. However, the complexity of MLD increases exponentially in the number of users and constellation size. In this paper, a new multi-stage low complexity MLD scheme using sensitive bits algorithm (SB-MLD) is proposed. It is shown that it can greatly reduce the computational complexity with a minimal penalty in performance compared with the exhaustive MLD scheme.
AB - Space Division Multiple Access (SDMA) is a promising solution for the significant increase of system capacity and spectral efficiency in Wireless LANs. To make the system more robust against the detrimental effects of frequency selective fading channels, a combined OFDM/SDMA based WLAN has been recently proposed. In particular, it has been shown that MLD (Maximum Likelihood Detection) has the best SNR performance compared with other detection schemes such as LMMSE and SIC (Successive Interference Cancellation) based ones. However, the complexity of MLD increases exponentially in the number of users and constellation size. In this paper, a new multi-stage low complexity MLD scheme using sensitive bits algorithm (SB-MLD) is proposed. It is shown that it can greatly reduce the computational complexity with a minimal penalty in performance compared with the exhaustive MLD scheme.
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UR - http://www.scopus.com/inward/citedby.url?scp=0034869840&partnerID=8YFLogxK
M3 - Article
VL - 4
SP - 1152
EP - 1156
JO - Conference Record - International Conference on Communications
JF - Conference Record - International Conference on Communications
SN - 0536-1486
ER -