基于插值圓陣的寬帶信號(hào)二維空間譜估計(jì)
TWO-DIMENSIONAL SPATIAL-SPECTRUM ESTIMATION FOR WIDE-BAND SOURCES BASED ON INTERPOLATED CIRCULAR ARRAYS
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摘要: 在陣列信號(hào)處理中,確定信號(hào)的波達(dá)方向(DOA)需要估計(jì)信號(hào)的二維(2-D)空間譜。C。Usha Padmini等人(1994)已證明,圓陣用于估計(jì)寬帶信號(hào)的DOA時(shí)具有許多好的特性。尤其是在基于圓陣的寬帶信號(hào)子空間一維DOA估計(jì)中,即使不用延遲抽頭也不會(huì)出現(xiàn)頻率-方向模糊。在估計(jì)寬帶信號(hào)的2-D空間譜時(shí),我們發(fā)現(xiàn)用不帶延遲抽頭的圓陣會(huì)出現(xiàn)頻率-仰角模糊。本文提出了一種用插值圓陣估計(jì)寬帶信號(hào)2-D空間譜的新方法。在估計(jì)中,采用大孔徑的圓陣(rmin/2)能獲得更好的分辨性能和估計(jì)穩(wěn)健性。
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關(guān)鍵詞:
- 陣列信號(hào)處理; 2-D空間譜估計(jì); 寬帶信號(hào); 插值圓陣
Abstract: In array signal processing, 2-D spatial-spectrum estimation is required to determine DOA of multiple signals. A circular array of sensors is found to possess several nice properties for DOA estimation of wide-band sources. C. Usha Padmini et al. (1994) have suggested that there is no frequency-direction ambiguity in azimuth estimation for wide-band signals by using a circular array, even without the use of any tap delay elements. In 2-D spatial-spectrum estimation for wide-band signals, we find that it is impossible to avoid the ambiguity in source frequency-elevation angle pairs using a circular array. In this paper, interpolated circular arrays are used to perform 2-D spatial-spectrum estimation for wide-band sources. In the estimation, a large aperture circular array (r min/2) is found to possess suprior resolution capability and robustness. -
Su G, Morf M. IEEE Trans. on ASSP, 1983, ASSP-31(12): 1,502- 1122.[2]Wax M, et al. IEEE Trans. on ASSP, 1984, ASSP-32(8): 817-827.[3]Wang H, Kaveh M. IEEE Trans. on ASSP, 1985, ASSP-33(8?: 823-831.[4]Krolik J, Swingler D N. IEEE Trans. on ASSP, 1990, ASSP-38(2): 356-360.[5]Friedlander B, Weiss A J. IEEE Trans. on ASSP 1993, ASSP-41(4): 1618-1634.[6]Buckley K M, Griffiths L J. IEEE Trans. on ASSP 1988, ASSP-36(7): 953-964.[7]Padmini C U, Naidu P S. Signal Processing, 1994, 37(2): 243-254. -
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