可变速率预编码BLAST与特征波束形成组合方案
doi: 10.3724/SP.J.1146.2006.02096
A Transmit Processing Scheme Combined BLAST and Eigenbeamforming with Variable Rate Allocation
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摘要: 传统的基于迫零(ZF)和最小均方误差(MMSE)算法的分层空时码(BLAST)接收机由于其较大的复杂度不适合在移动终端使用。该文的发射方案将传输预编码BLAST与特征波束成形相结合,利用信道协方差矩阵特征值分解得到的特征波束来承载空时分层码,并在目标BER约束下自适应调整速率。在下行链路发送端使用可变速率预编码BLAST与特征波束形成组合方案,大大简化了移动终端的接收机算法。Abstract: Conventional Bell-labs Layered Space Time (BLAST) receivers based on ZF or MMSE algorithm are of great complexity which can not be utilized in the mobile. This paper proposed a transmitter design which combined BLAST and eigenbeamforming with multiple beams pointing to orthogonal directions along the eigenvectors of the channels correlation matrix, and with variable rate allocation under certain bit error rate requirement. In this technique, layered spacetime pre-processing at the transmitter with a simplified receiver at the mobile station requires only simple signal processing.
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