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一種改進(jìn)的NLOS環(huán)境下的TDOA/AOA混合定位算法

段凱宇,  張力軍

段凱宇, 張力軍. 一種改進(jìn)的NLOS環(huán)境下的TDOA/AOA混合定位算法[J]. 電子與信息學(xué)報, 2006, 28(2): 203-207.
引用本文: 段凱宇, 張力軍. 一種改進(jìn)的NLOS環(huán)境下的TDOA/AOA混合定位算法[J]. 電子與信息學(xué)報, 2006, 28(2): 203-207.
Duan Kai-yu, Zhang Li-jun . An Improved Hybrid TDOA/AOA Location Algorithm in NLOS Environment[J]. Journal of Electronics & Information Technology, 2006, 28(2): 203-207.
Citation: Duan Kai-yu, Zhang Li-jun . An Improved Hybrid TDOA/AOA Location Algorithm in NLOS Environment[J]. Journal of Electronics & Information Technology, 2006, 28(2): 203-207.

一種改進(jìn)的NLOS環(huán)境下的TDOA/AOA混合定位算法

An Improved Hybrid TDOA/AOA Location Algorithm in NLOS Environment

  • 摘要: 在蜂窩移動通信系統(tǒng)中，利用基站測量的到達(dá)時間差(TDOA)和電波到達(dá)角(AOA)的混合定位方法能夠比傳統(tǒng)的TDOA方法提供更高的定位精度。但是在非視距(NLOS)條件下，當(dāng)AOA的測量誤差超過一定值時，定位的誤差仍然很大。該文根據(jù)NLOS傳播環(huán)境下附加傳播時延服從指數(shù)分布的特性，估計附加時延的均值和方差，對TDOA測量值進(jìn)行重構(gòu)，再以AOA方法進(jìn)行輔助定位。仿真結(jié)果表明，該算法能顯著提高傳統(tǒng)的TDOA和TDOA/AOA方法在NLOS傳播環(huán)境下的定位精度。
    Abstract: In cellular mobile communication systems, the hybrid Time Difference Of Arrival(TDOA) and the Angle Of Arrival(AOA) location algorithm can reach higher accuracy than traditional TDOA method does. But in NLOS environment, when the measurement error of AOA surpasses a certain value, the location error is still large. This paper proposes an effective location method on the condition that the excessive time delay in NLOS environment is exponential. This method estimates the mean and variances of the excessive time delay based on its statistical property firstly and then reconstructs the TDOA for migrating the influence of the NLOS error. Then use the AOA algorithm as the assistant method. The result of simulation proves its effectiveness in improving the location accuracy than traditional TDOA and TDOA/AOA method in NLOS propagation environment.
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  • Chan Y T, Ho K C. A simple and efficient estimator for hyperbolic location. IEEE Trans. on Signal Processing, 1994, SP-42(8): 1905.1915.[2]鄧平, 李莉, 范平志. 一種TDOA/AOA混合定位算法及其性能分析. 電波科學(xué)學(xué)報, 2002, 17(6): 633636. .[3]Cong Li, Zhuang Wei-hua. Hybrid TDOA/AOA mobile user location for wideband CDMA cellular system. IEEE Trans. on Wireless Comunications, 2002, 18(3): 439447.[4]Ma Changlin, Klukas R, Lachapelle G . An enchanced two-step least squared approach for TDOA/AOA wireless location, ICC2003, Anchorage, Alaska, USA, 2003.5, Vol.2: 987.991.[5]Wylie M P, Holtzman J. The non-line-of-sight problem in mobile location estimation[A]. IEEE International Conference on Universal Personal Communication, Cambridge, Massachusetts, USA, 1996: 827.831.[6]Chen Pi-chun. A non-line-of-sight error mitigation algorithm[J].IEEE Wireless Communications and Networking Conference (WCNC99), New Orleans, USA.1999, 1(9):316320-[7]鄧平, 劉林, 范平志. 一種基于TDOA重構(gòu)的蜂窩網(wǎng)定位服務(wù)NLOS誤差消除方法. 電波科學(xué)學(xué)報, 2003, 18(3): 311.316.[8]田孝華, 廖桂生. 一種有效減小非視距傳播影響的TOA定位方法. 電子學(xué)報, 2003, 31(9): 14291432. .[9]Greenstein L J, et al.. A new path-gain/delay spread propagation model for digital cellular channel[J]. IEEE Trans. on VT, 1997,46(2): 177.484.[10]Aszetly D. On antenna arrays in mobile communication system: Fast fading and GSM base station receiver algorithms. [Ph.D. dissertation], Royal Institute Technology, Sweden, Mar. 1996.[11]Klukas R, Fattouche M. Line-of-sight angle of arrival estimation in the outdoor multipath environment. IEEE Trans. on VT, 1998, 47(1): 342.351.[12]Reed J, Rappaport T. An Overview of the challenges and progress in meeting the E-911 requirement for location Service[J]. IEEE Communication Magazine , 1998, 36(4): 3037.
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出版歷程
  • 收稿日期:  2004-07-07
  • 修回日期:  2004-11-22
  • 刊出日期:  2006-02-19

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