Advanced Multipath Mitigation Techniques for Satellite-Based Positioning Applications
المؤلفون المشاركون
Bhuiyan, Mohammad Zahidul H.
Lohan, Elena Simona
المصدر
International Journal of Navigation and Observation
العدد
المجلد 2010، العدد 2010 (31 ديسمبر/كانون الأول 2010)، ص ص. 1-15، 15ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2010-12-09
دولة النشر
مصر
عدد الصفحات
15
التخصصات الرئيسية
الملخص EN
Multipath remains a dominant source of ranging errors in Global Navigation Satellite Systems (GNSS), such as the Global Positioning System (GPS) or the future European satellite navigation system Galileo.
Multipath is generally considered undesirable in the context of GNSS, since the reception of multipath can make significant distortion to the shape of the correlation function used for time delay estimation.
However, some wireless communications techniques exploit multipath in order to provide signal diversity though in GNSS, the major challenge is to effectively mitigate the multipath, since we are interested only in the satellite-receiver transit time offset of the Line-Of-Sight (LOS) signal for the receiver's position estimate.
Therefore, the multipath problem has been approached from several directions in order to mitigate the impact of multipath on navigation receivers, including the development of novel signal processing techniques.
In this paper, we propose a maximum likelihood-based technique, namely, the Reduced Search Space Maximum Likelihood (RSSML) delay estimator, which is capable of mitigating the multipath effects reasonably well at the expense of increased complexity.
The proposed RSSML attempts to compensate the multipath error contribution by performing a nonlinear curve fit on the input correlation function, which finds a perfect match from a set of ideal reference correlation functions with certain amplitude(s), phase(s), and delay(s) of the multipath signal.
It also incorporates a threshold-based peak detection method, which eventually reduces the code-delay search space significantly.
However, the downfall of RSSML is the memory requirement which it uses to store the reference correlation functions.
The multipath performance of other delay-tracking methods previously studied for Binary Phase Shift Keying-(BPSK-) and Sine Binary Offset Carrier- (SinBOC-) modulated signals is also analyzed in closed loop model with the new Composite BOC (CBOC) modulation chosen for Galileo E1 signal.
The simulation results show that the RSSML achieves the best multipath mitigation performance in a uniformly distributed two-to-four paths Rayleigh fading channel model for all three modulated signals.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Bhuiyan, Mohammad Zahidul H.& Lohan, Elena Simona. 2010. Advanced Multipath Mitigation Techniques for Satellite-Based Positioning Applications. International Journal of Navigation and Observation،Vol. 2010, no. 2010, pp.1-15.
https://search.emarefa.net/detail/BIM-470051
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Bhuiyan, Mohammad Zahidul H.& Lohan, Elena Simona. Advanced Multipath Mitigation Techniques for Satellite-Based Positioning Applications. International Journal of Navigation and Observation No. 2010 (2010), pp.1-15.
https://search.emarefa.net/detail/BIM-470051
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Bhuiyan, Mohammad Zahidul H.& Lohan, Elena Simona. Advanced Multipath Mitigation Techniques for Satellite-Based Positioning Applications. International Journal of Navigation and Observation. 2010. Vol. 2010, no. 2010, pp.1-15.
https://search.emarefa.net/detail/BIM-470051
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-470051
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر