Department of Broadcast Engineering, IRIB University, Tehran 1779617165, Iran.
J Acoust Soc Am. 2010 Jan;127(1):286-91. doi: 10.1121/1.3268609.
There are varieties of wideband direction-of-arrival (DOA) estimation algorithms. Their structure comprises a number of narrowband ones, each performs in one frequency in a given bandwidth, and then different responses should be combined in a proper way to yield true DOAs. Hence, wideband algorithms are always complex and so non-real-time. This paper investigates a method to derive a flat response of narrowband multiple signal classification (MUSIC) [R. O. Schmidt, IEEE Trans. Antennas Propag., 34, 276-280 (1986)] algorithm in the whole frequencies of given band. Therefore, required conditions of applying narrowband algorithm on wideband impinging signals will be given through a concrete analysis. It could be found out that array sensor locations are able to compensate the frequency variations to reach a flat response of DOAs in a specified wideband frequency.
存在多种宽带波达方向（DOA）估计算法。它们的结构由多个窄带算法组成，每个算法在给定带宽内的一个频率上执行，然后应该以适当的方式组合不同的响应，以获得真实的 DOA。因此，宽带算法通常很复杂，因此不是实时的。本文研究了一种在给定带宽的整个频率范围内得出窄带多重信号分类（MUSIC）[R. O. Schmidt，IEEE Trans. Antennas Propag.，34，276-280（1986）]算法的平坦响应的方法。因此，通过具体分析，将给出在宽带入射信号上应用窄带算法的要求条件。可以发现，通过阵列传感器的位置可以补偿频率变化，从而在指定的宽带频率范围内达到 DOA 的平坦响应。
