A novel efficient coherent direction-of-arrival (DOA) estimation method is devised in this article. First, a new cost function without the knowledge of source number is developed exploiting the Toeplitz matrices’ joint diagonalization structure. Then, the revised steering vectors are used in the place of projection weights of the steering vectors to reconstruct the power spectrum in both noise and signal subspaces. The coherent DOAs are estimated using the 1-D search. Furthermore, the computational complexity of the proposed method is significantly reduced using the Nystrom approximation. Finally, the developed theoretical model is implemented on the TMS320C6678 digital signal processor (DSP) to exemplify the efficacy of the novel method.

中文翻译：

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使用数字信号处理器的到达估计器和实现的新方向

本文设计了一种新颖的有效相干到达方向 (DOA) 估计方法。首先，利用 Toeplitz 矩阵的联合对角化结构开发了一种不知道源编号的新成本函数。然后，使用修正的导向向量代替导向向量的投影权重来重建噪声和信号子空间中的功率谱。使用一维搜索来估计相干 DOA。此外，使用 Nystrom 近似显着降低了所提出方法的计算复杂度。最后，开发的理论模型在 TMS320C6678 数字信号处理器 (DSP) 上实现，以举例说明新方法的功效。