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.
|Title of host publication||2012 IEEE International Conference on Communications, ICC 2012|
|Number of pages||5|
|Publication status||Published - 2012|
|Event||2012 IEEE International Conference on Communications, ICC 2012 - Ottawa, ON, Canada|
Duration: 10 Jun 2012 → 15 Jun 2012
|Other||2012 IEEE International Conference on Communications, ICC 2012|
|Period||10/06/12 → 15/06/12|