中文摘要：

提出了一种针对多用户CDMA VBLAST MIMO系统结构的快速非线性检测算法，该算法首先通过核方法将接收端多个天线收到的信号进行非线性映射，得到新的数据空间，然后对其进行加权求和得到输出信号，最后形成系统判决输出。为了避免直接矩阵求逆运算，权系数的求解采用递增方式进行，这将显著减小算法计算量和复杂性。仿真结果表明：提出的算法在误码率方面能够取得明显优于常规线性MMSE算法的性能，算法的有效性得到验证。

英文摘要：

A fast nonlinear detection algorithm is proposed for multi-user CDMA Vertical Bell Laboratories Layered Space Time （VBLAT） Multiple-Input Multiple-Output（MIMO） system. In this algorithm, the received data at multiple receiver antennas are nonlinearly mapped by kernel method and then summed with weights,at last a hard decision output based on this sum is made. The weight coefficients are incrementally computed to avoid direct computation of the inverse of a matrix, which greatly reduces the computational complexity. Simulations and comparisons show that the proposed algorithm can obtain better performance of Bit Error Rate （BER） than linear Minimum Mean Square Error （MMSE）.