AB  - Channel matrix inversion, which requires significant hardware resource and computational power, is a very challenging problem in MIMO-OFDM systems. Casting the frequency-domain channel matrix into a polynomial matrix, interpolation-based matrix inversion provides a promising solution to this problem. In this paper, by showing that the polynomial coefficients can be well approximated by a Gaussian function, we propose an efficient algorithm, which relaxes the requirement for knowing the maximum multipath delay spread and enables the use of simple low-complexity interpolators by introducing a phase shift term to the signal to be interpolated. Simulation results show that significant complexity saving can be achieved with little equalization performance degradation. © 2012 IEEE.
AU  - Zhang, J
AU  - Huang, X
AU  - Suzuki, H
AU  - Chen, Z
DA  - 2012/12/01
DO  - 10.1109/ICC.2012.6363793
EP  - 3835
JO  - IEEE International Conference on Communications
PY  - 2012/12/01
SP  - 3831
TI  - Phase-shifted interpolation for channel matrix inversion in MIMO-OFDM systems
Y1  - 2012/12/01
Y2  - 2026/07/21
ER  -