基于行列式的预编码码字选择方法

提出了一种应用于FD-MIMO有限反馈系统的预编码设计方案,该方案充分利用信道分解后的特征向量,能够更准确地反映信道特征信息,通过提出的行列式选码准则进行垂直与水平方向上码字的选择,并构成克罗内克(Kronecker)积形式的码字结构,同时还给出了确定合理反馈开销的具体公式。仿真结果表明,反馈开销确定公式与预期结果相吻合,在相同条件下,该方案均能选出更为准确的码字,在系统整体性能上较现有方法有更好地提升。

A Determinant-Based Precoding Codeword Selection Method

A precoding scheme for the FD-MIMO (full-dimension multiple input multiple output), limited-feedback systems is proposed and a determinant-based criterion of selecting precoding codeword is presented. This scheme can reveal the channel feature information more accurately after channel decomposition, select the codewords in the vertical and horizontal vectors by the presented criterion, and form the codeword structure in the form of Kronecker product. Furthermore, a formula for calculating the efficient number of the feedback is also proposed. The results of simulations show the effectiveness of the proposed scheme and the proposed formula.