Summary
International Symposium on Antennas and Propagation
2010
Session Number:3TA2
Session:
Number:3TA2-5
Array Configuration Conversion Method Using CSS Processing for DOA Estimation
Takuya Ohara, Nobuyoshi Kikuma, Hiroshi Hirayama, Kunio Sakakibara,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Recent development of wireless communication and radar systems is remarkable. On the other hand, miscellaneous radio waves make our radio environments much complicated. Therefore, it is important to understand appropriately the radio wave propagation structures so as to attain high performance of the wireless systems. For the purpose, it is effective to estimate DOAs (directions of arrival) of individual incoming waves with array antennas [1]. As the DOA estimation algorithms, MUSIC and ESPRIT [1] receives much attention because of their high resolution and high estimation accuracy. In addition, nonsearching algorithms such as Root-MUSIC [1] and ESPRIT are computationally efficient although they require a uniform linear or rectangular array. Therefore, when we use the estimation approach of nonsearching type for an arbitrary or irregular array, we need the conversion processing of the received signal from the real array to a virtual uniform linear array as an example [2]. In this paper, we propose the array configuration conversion method using CSS (Coherent Signal Subspace) processing [3], and we show through computer simulation that this conversion method performs well in the DOA estimation using the circular array.