摘要
针对WCDMA通信系统的多用户多径传播环境,文中提出了一种高精度的DOA估计方法。该算法通过计算已知的参考序列与其发生相位偏移后的序列之间的相位偏移进行DOA估计。该方法在估计之前进行了干扰抑制,因此能够有效地减少同信道干扰。此外,与传统的基于特征值分解的估计方法相比,文中方法不受信源数小于阵元数的影响,因此具有计算复杂度低,精度高的特点。仿真结果证明了这一点。
In this paper, a high-accuracyDOA estimation method is proposed for WCDMAsystem with multiusers and multipath propagation. The proposed method of DOA estimation is based on the computation of the phase shift between a known reference signal and its phase-shifted version. Since DOA estimation is after interference reduction, the effect of co-channel interference is significantly reduced. As compared with conventional subspace and eigendecomposition-based DOA estimation methods, the proposed method has the advantages of low-complexity and high-accuracy. Simulation results have proved this.
出处
《通信技术》
2007年第12期142-144,共3页
Communications Technology
