Abstract
This paper presents an improved lattice reduction aided MMSE detection based on MIMO system. The proposed detection technique reduces the orthogonality defect of the MIMO channel matrix based on LLL algorithm and the Gram-Schmidt orthogonalization procedure. BER performance of MMSE detector with and without lattice reduction is analyzed using LLL algorithm for 4x4 and 8x8 MIMO system. The proposed detection technique can achieve more reliable estimation, compared to the conventional lattice reduction aided detection.