Novel HARQ Scheme Based on BLAST Combine STBC in MIMO System
Wang De-sheng · 2008
This paper proposes a HARQ scheme based on comparison of BLAST and quasi-orthogonal STBC in MIMO system,also proposes a matrix inversion decode method.Different from traditional ARQ,the proposed method transfers the next line of data matrix and joint-decode them as STBC.It can get additional spatial diversity form the retransmission and get spatial multiplexing in good channel condition for no retransmission.This paper proposes a matrix inversion algorithm to joint-decode data matrix.The simulation result shows matrix inversion algorithm has similar performance to Maximum likelihood method,also has much lower complexity.The proposed method has the advantage of BLAST and STBC also HARQ,it is a HARQ scheme that can improve transmit rate and improve resistance of interference at same time.Specially,the proposed HARQ scheme can apply in any MIMO system that receiver more than transfer,it has extensive application.