[1]李明江,张 一,张中兆.多径干扰下一种新的有效的弱GPS信号处理算法[J].南京理工大学学报(自然科学版),2009,(01):64-68.
 LI Ming-jiang,ZHANG Yi,ZHANG Zhong-zhao.New Effective Weak GPS Signal Processing Method in Mulitipath Interference Environment[J].Journal of Nanjing University of Science and Technology,2009,(01):64-68.
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多径干扰下一种新的有效的弱GPS信号处理算法
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
期数:
2009年01期
页码:
64-68
栏目:
出版日期:
2009-02-28

文章信息/Info

Title:
New Effective Weak GPS Signal Processing Method in Mulitipath Interference Environment
作者:
李明江1 张 一2 张中兆1
1. 哈尔滨工业大学通信技术研究所, 黑龙江哈尔滨150001; 2. 中国空间技术研究院卫星应用系统部, 北京100086
Author(s):
LI Ming-jiang1ZHANG Yi2ZHANG Zhong-zhao1
1.Communication Research Center,Harbin Institute of Technology,Harbin 150001,China;2.Satellite Application Department,Chinese Academy of Space Technology,Beijing 100086,China
关键词:
多径干扰 全球定位系统 弱信号 高灵敏度 接收机 频域相关 差分累积
Keywords:
multipath interference global positioning system weak signals high sensitivity receivers frequency domain correlation difference accumulation
分类号:
P228.4
摘要:
为了提高全球定位系统(GPS)接收机的增益,有必要进行长时间的累积积分。针对累积最重要的限制:导航电文的变化、多谱勒频偏的影响以及非相干累积的平方损失,该文指出在弱信号条件下快速傅立叶变换捕获较传统算法更具有优势。该算法通过采用差分累积,增加累积时间,减轻非相干累积平方带来的增益损失。另外,全比特搜索算法能够估计出导航数据的最佳组合,实现长时间的相干积分。结合这两种算法,提出一套完整的GPS弱信号处理方案。最后进行了Monte-Carlo仿真,仿真试验结果验证了该算法的有效性。
Abstract:
In order to enhance the gain of the global positioning system(GPS) receiver,a long integration time is needed.The most challenging problems are navigation data transitions,Doppler frequency error and square loss caused by non-coherent integration.For those bad factors,fast Fourier transformation acquisition has much superiorities than traditional ways.Different coherent integration improves integration time and removes square loss.Full-bit searching method estimates the optimal combination of these navigation data very well.Combining the superiorities of the two algorithms,an improved weak signal acquisition method is proposed.Simulation results prove that the proposed method can improve the receiving performances of GPS in multipath interference environment by means of Monte-Carlo.

参考文献/References:

[ 1] 蔡昌听, 皮亦鸣. 高灵敏度GPS技术的研究进展[ J].全球定位系统, 2006( 2): 1- 9.

[ 2] ChuanM Y, FengK T. AdaptiveGPS acqu isition technique in w eak signal environm ent[ A ]. IEEE 63rd vehicular techno logy conference[ C]. M elbourne, Austra-lia: IEEE VTS, 2006. 2612- 2616.
[ 3] Razav i A, Gebre E D. Carrier loop architectures fortracking w eak GPS signa ls [ J]. IEEE Transactions onAerospace and E lectronic Systems, 2008, 23( 13): 697- 710.
[ 4] M ac G G, Lachape lle G, Klukas R. Performance analysis of a stand-a lone h igh sens itiv ity rece ive r[ J].GPS So lutions, 2002, 6( 3): 179- 195.
[ 5] Psiak iM L. B lock acquisition o fw eak GPS signals in asoftware receiver[ A]. Proceed ings of ION GPS /GNSS[ C ]. Salt Lake C ity, Tex as, USA: Un ive rsity o fTexas,2001. 2838- 2850.
[ 6] Psiak iM L. Sm oo ther-based GPS s igna l track ing in asoftware receiver[ A]. Proceed ings of ION GPS /GNSS[ C ]. Salt Lake C ity, Tex as, USA: Un ive rsity o fTexas,2001. 2900- 2913.
[ 7] Sascha M, Spang enberg I S, Stephen M, et a.l AnFFT-based approach for fast acqu isition in spreadspectrum comm un ica tion system s [ J]. W ire less Pe rsonalComm un ications, 2000, 13: 27- 56.

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备注/Memo

备注/Memo:
作者简介: 李明江( 1976- ), 男, 博士生, 主要研究方向: 移动通信及无线数据传输理论, E-m a il:lim ing jiang@ hit.edu. cn。
更新日期/Last Update: 2012-11-19