Semi-blind channel estimation of MIMO-OFDM systems with pulse shaping

Abstract— Most of the existing MIMO-OFDM channel estimation methods do not take into account the effect of the pulseshaping filter in the transmitter nor of the matched filter in the receiver, thus leading to an estimation solution for the composite channel including the pulse-shaping and matched filters, instead of for the pure wireless channel. This solution is neither directly applicable to practical communication systems nor sufficiently accurate due to the extra length of the composite channel induced by the two filters. In this paper, a semi-blind channel estimation method is proposed for pulse-shaped MIMO-OFDM systems. By utilizing the knowledge of pulse-shaping and matched filters, a time domain semi-blind estimation method is developed for the pure multi-path channel. In order to reduce the computational burden of the time-domain algorithm, a frequency-domain alternative is derived. A number of computer simulation-based experimentations are conducted, and these simulat...

• Type: Conference
• Year: 2008
• Where: ISCAS
• Authors: Feng Wan, Wei-Ping Zhu, M. N. S. Swamy
• Keywords: Channel Estimation Method, Composite Channel, Hardware, ISCAS 2008, Matched filters