Downlink SU-MIMO Beamforming Strategy for Non-ideal Channel Reciprocity in TD-LTE
Author(s): CAI Zhen-hao, CHEN Wen, ZHAO Kun
Pages: 16-20
Year: 2014 Issue: 7
Journal: Telecommunication Engineering
Keyword: TD-LTE system; channel state information; beamforming; eigen matrix; transmission mode 8;
Abstract: The channel information time-varying character,asymmetric cell interference and the RF paths in antennas and the baseband module between uplink and the downlink will worsen the application of reci-procity and reduce the beamforming gain in TD-LTE system. Aiming at designing pre-coding for non-ideal reciprocity,a cost function with maximizing the Signal-to-Interference plus Noise Ratio(SINR) in statisti-cal average way is proposed. The regularization matrix pencil is deduced with the statistical correlation ma-trix of the prior channel state information(CSI) matrix and the reciprocity mismatch error matrix. The pre-coding matrix designing can be translated to the deriving generalized eigenmatrix. The simulation shows that the algorithm can build a robust system.
Pages: 16-20
Year: 2014 Issue: 7
Journal: Telecommunication Engineering
Keyword: TD-LTE system; channel state information; beamforming; eigen matrix; transmission mode 8;
Abstract: The channel information time-varying character,asymmetric cell interference and the RF paths in antennas and the baseband module between uplink and the downlink will worsen the application of reci-procity and reduce the beamforming gain in TD-LTE system. Aiming at designing pre-coding for non-ideal reciprocity,a cost function with maximizing the Signal-to-Interference plus Noise Ratio(SINR) in statisti-cal average way is proposed. The regularization matrix pencil is deduced with the statistical correlation ma-trix of the prior channel state information(CSI) matrix and the reciprocity mismatch error matrix. The pre-coding matrix designing can be translated to the deriving generalized eigenmatrix. The simulation shows that the algorithm can build a robust system.
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