基于旋轉(zhuǎn)干涉儀圓陣化的多目標(biāo)參數(shù)估計(jì)新算法

辛金龍; 廖桂生; 楊志偉; 解虎

doi:10.11999/JEIT170217

基于旋轉(zhuǎn)干涉儀圓陣化的多目標(biāo)參數(shù)估計(jì)新算法

doi: 10.11999/JEIT170217

1.
(西安電子科技大學(xué)雷達(dá)信號(hào)處理國(guó)家重點(diǎn)實(shí)驗(yàn)室西安 710071)

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61671352, 61231017)，國(guó)家青年科學(xué)基金(61501471)，認(rèn)知無(wú)線電與信息處理教育部重點(diǎn)實(shí)驗(yàn)室基金(CRKL160206)

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- 文章訪問(wèn)數(shù): 1245
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出版歷程
- 收稿日期: 2017-03-17
- 修回日期: 2017-11-13
- 刊出日期: 2018-02-19

Multiple Source Parameter Estimation for Rotating Interferometer Using Circular Array Processing

1.
(National Laboratory of Radar Signal Processing, Xidian University, Xi&rsquo
2.
(Xi&rsquo

Funds:

The National Natural Science Foundation of China (61671352, 61231017), The National Science Foundation for Young Scientists of China (61501471), The Foundation of Key Laboratory of Cognitive Radio and Information Processing, Ministry of Education (CRKL160206)

摘要

摘要: 針對(duì)現(xiàn)有的長(zhǎng)基線旋轉(zhuǎn)干涉儀存在相位模糊，且不能對(duì)多個(gè)同頻、同時(shí)到達(dá)的目標(biāo)信號(hào)進(jìn)行角度估計(jì)問(wèn)題，該文提出一種基于旋轉(zhuǎn)干涉儀虛擬圓陣化的多目標(biāo)波達(dá)參數(shù)估計(jì)新算法。該方法首先將旋轉(zhuǎn)干涉儀采樣得到的兩通道數(shù)據(jù)進(jìn)行共軛相乘操作，獲得虛擬圓陣信號(hào)；然后采用波束空間變換法將虛擬圓陣數(shù)據(jù)從陣元空間轉(zhuǎn)換到波束空間，得到虛擬線陣數(shù)據(jù)序列；最后在實(shí)波束域上實(shí)現(xiàn)多目標(biāo)2維角度無(wú)模糊估計(jì)。相比于傳統(tǒng)旋轉(zhuǎn)干涉儀方法而言，所提方法在不增加接收通道的同時(shí)，能夠?qū)崿F(xiàn)多目標(biāo)角度的無(wú)模糊測(cè)量。仿真實(shí)驗(yàn)驗(yàn)證了所提方法的有效性。
- 多目標(biāo)參數(shù)估計(jì) /
- 旋轉(zhuǎn)干涉儀 /
- 虛擬圓陣 /
- 波束空間轉(zhuǎn)換 /
- 相位解模糊
Abstract: Focus on the problem of phase ambiguity and the issue that it is impossible to estimate the unambiguous angles of multiple sources with the same frequency and time of arrival. An approach for multiple sources parameters estimation with rotating interferometer using virtual circular array processing is proposed in this paper. Firstly, the virtual circular array data is constructed by taking conjugate multiplication of the two channel data received by the rotating interferometer. Then, the virtue linear array data is obtained by employing beamspace transformation, which performs mapping from element-space to beamspace domain. Finally, the unambiguous angles of the multiple emitters are achieved in beamspace domain. Compared with conventional rotating interferometer methods, the proposed method can deal with the problem of unambiguous Direction Of Arrival (DOA) estimation of multiple emitters with only two receiving channels. The validity of the proposed method is verified by the simulation results.
- Multiple source parameter estimation /
- Rotating interferometer /
- Virtual circular array /
- Beamspace transformation /
- Unwrap phase ambiguity

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