摘要
基于双边相关变换提出了一种宽带DOA估计快速算法。与已有的双边相关变换(TCT)算法不同,本方法虽然基于聚焦误差最小提出,但最终处理却避开了聚焦矩阵的构造和聚焦过程,从而大大提高了运算效率。理论分析证明该方法在构造无噪相关矩阵的过程中隐含了对各个频率点信号能量的聚焦,从而保证在简化运算的同时不损失估计性能。计算机仿真验证了快速算法的有效性。
Based on two-sided correlation transformation, a fast algorithm for wideband DOA estimation is proposed. The derivation starts at minimizing the focusing error and does not require any actual focusing procedure in the processing. It is shown that the computational complexity of the new method is significantly less than those of the existing two-sided correlation transformation （TCT） algorithm. Theoretical analysis shows that the new algorithm implicitly concentrates the power at all frequency bins when it constructs the noise-free correlation matrix, and therefore reduces the computational load without any recognizable loss in the estimation performance. The simulation results demonstrate the effectiveness of the new algorithm.
出处
《中国电子科学研究院学报》
2009年第6期636-640,650,共6页
Journal of China Academy of Electronics and Information Technology
