A new spatio-temporal equalization method using estimated channel impulse response
Kazunori Hayashi, Shinsuke Hara · 2002
This paper proposes a new spatio-temporal equalization method, which utilizes an adaptive antenna array and a decision feedback equalizer (DFE) simultaneously. In the design of a spatio-temporal equalizer, how to split equalization functionality into a spatial equalizer and a temporal equalizer plays an important role to achieve effective equalization. Since the performance of a spatial equalizer and a temporal equalizer depends on channel conditions, such as direction of arrival (DoA) patterns and maximum time delay of incoming signals, it is essential to adaptively split the functionality into the spatial and temporal equalizer, according to the channel condition. The proposed equalizer adaptively changes its beamforming method depending on estimated channel impulse response, therefore, it can achieve high performance in various channels. The performance of the proposed system in Rayleigh fading channels, Rician fading channels and static multipath channels, in terms of bit error rate (BER), is evaluated in comparison with the performance of spatial equalizer and temporal equalizer.