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| A Sequence Detection Method with Adaptive Channel Tracking in Time-varying Multipath MIMO Channels |
| Jing Xiao-rong①; Zhou Zheng-zhong①; Xu Zheng② |
①School of Communication and Information Engineering, UEST of China, Chengdu 610054, China;
②School of Electric and Electronic Engineering, East China Jiaotong University, Nanchang 330013, China |
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Abstract Adopting the hybrid MLSE (H-MLSE) on each MISO subsystem firstly, and then combining the Γ-selection of survival states, a complexity-controllable sequence detention method with adaptive channel tracking is proposed for Multi-Input Multi-Output (MIMO) time-varying multipath channels. In contrast to the conventional MLSE, the proposed method has three features: (1) the adjustable computational complexity, which can be achieved by adjusting the parameter; (2) the on-line channel tracking with near zero-delay, which is embedded in the scheme and accomplished for each selected survival state transition along the corresponding path by decision-directed/LMS algorithm (DD/LMS); (3) It can be partly implemented by parallel processing technology. The simulation results show the proposed method can achieve the satisfactory detection performance for 2X4 time-varying MIMO channel with two multipaths when Γ≥2.
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Received: 04 July 2008
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2009, Vol. 31 
