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：

---

使用数字信号处理器进行高效相干到达方向估计和实现


本文设计了一种新颖高效的相干波达方向（DOA）估计方法。首先，利用托普利茨矩阵的联合对角化结构开发了一种无需源数知识的新成本函数。然后，使用修正的引导向量代替引导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，在 TMS320C6678 数字信号处理器 (DSP) 上实现了所开发的理论模型，以证明该新颖方法的有效性。