Abstract—A signal detection method that has high performance with low computational complexity is required for spatially multiplexed multiple antenna systems. Among conventional signal detection methods, QR decomposition M algorithm maximum likelihood (QRM-MLD) is known as the optimal method, but a lot of computational complexity is needed. Here, hybrid signal detection method is proposed, which can reduce computational complexity using minimum mean square error (MMSE) and reduced complexity (RC)-QRM-MLD adaptively. The proposed method is adopted in 3GPP LTE downlink environment, the results can show almost identical performance to that of QRM-MLD with less computational complexity.

Index Terms—Signal detection method, 3GPP LTE, MIMO,MMSE, QRM-MLD.

J. Lee, Y. Kim1, K. Kim and Y. Kim2 are with the Department of Electronic Engineering, Sogang University, C.P.P Box 1142, Seoul, Korea(phone : 82-2-707-0588, e-mail : jiny4509@sogang.ac.kr, kyskim@sogang.ac.kr, wsockkh@sogang.ac.kr and ylkim@sogang.ac.kr)

Cite: Jinyong Lee, Youngseh Kim, Kanghoon Kim, and Younglok Kim, "Hybrid Signal Detection Method Using MMSE and RC-QRM-MLD for Spatially Multiplexed MIMO Systems," International Journal of Computer and Electrical Engineering vol. 4, no. 3, pp. 387-389, 2012.