Improving the Estimation of Uncalibrated Fractional Phase Offsets for PPP Ambiguity Resolution
نویسندگان
چکیده
منابع مشابه
Real-time PPP with ambiguity resolution – Determination and Application of Uncalibrated Phase Delays
Currently, the precise point positioning (PPP) technique is a well-established GNSS processing method for postprocessing applications, while real-time PPP is still a field of ongoing research. Meanwhile a new RTCM (Radio Technical Commission for Maritime Services) standard for exchanging PPP corrections has been released. This so-called state space representation (SSR) contains orbit and clock ...
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In order to catch up the short-term clock variation of GNSS satellites, clock corrections must be estimated and updated at a high-rate for Precise Point Positioning (PPP). This estimation is already very time-consuming for the GPS constellation only as a great number of ambiguities need to be simultaneously estimated. However, on the one hand better estimates are expected by including more stat...
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As many coded systems operate at very low signal-to-noise ratios, synchronization becomes a very difficult task. In many cases, conventional algorithms will either require long training sequences or result in large BER degradations. By exploiting code properties, these problems can be avoided. In this contribution we present several iterative maximum-likelihood (ML) algorithms for joint carrier...
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ژورنال
عنوان ژورنال: Journal of Navigation
سال: 2012
ISSN: 0373-4633,1469-7785
DOI: 10.1017/s0373463312000112