Achievable positioning accuracies in a network of GNSS by Dabove, Paolo; Manzino, Ambrogio; De Agostino, Mattia PDF

By Dabove, Paolo; Manzino, Ambrogio; De Agostino, Mattia

ISBN-10: 953307843X

ISBN-13: 9789533078434

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E. the residual uncertainty from step 1), and a code-phase search range 6 chips wide. The knowledge of aiding data would allow for a narrower search space, but the acquisition has to account for possible residual errors between the true and predicted code phases. The code-phase resolution is as low as 1 sample (for both step 1 and 3). 046 MHz chosen to match the main lobe (two-sided) of the GPS signal spectrum. 092 MHz 24 22 Global Navigation Satellite Systems – Signal, Theory and Applications Will-be-set-by-IN-TECH designed to meet the Nyquist criterion.

1 Technique description As seen in (19), the decision variable of the Conventional Differential Combination (CDC) technique is an accumulation of the products between two consecutive correlator outputs Rm , Rm−1 . , 2007). This technique considers the products of two consecutive correlator outputs as in CDC as well as the products of two correlator outputs at all sample distances or referred as all possible spans, see Fig. 6(a). Let us 5 5 5 5 6SDQ 6SDQ 6SDQ 6SDQ 0 &RQYHQWLRQDO'LIIHUHQWLDO&RPELQDWLRQ &'& 2 $ + 9 + E *HQHUDOL]HG'LIIHUHQWLDO&RPELQDWLRQ *'& $ $ 2 $ + 9 + F 0RGLILHG*HQHUDOL]HG'LIIHUHQWLDO&RPELQDWLRQ 0*'& 50 $ 6*'& $0 50 6&'& $ $ $0 $ 2 $ 2 $ 2 $0 60*'& + 9 + 2 G D Fig.

Assisted (B-C): 28 26 Global Navigation Satellite Systems – Signal, Theory and Applications Will-be-set-by-IN-TECH The baseband E1 OS signal has the form [d(t)b(t) − c2nd (t)c(t)]. Due to the bi-polar nature of the data and secondary codes, the digital received baseband signal in each code period is always in one of the two representations |b[n] − c[n]| or |b[n] + c[n]| (52) This fact paves the way for a new strategy using one of the two equivalent codes (b¯ [n] − c¯[n]) or (b¯ [n] + c¯[n]) as the local code with the decision depending on the signal representation.

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Achievable positioning accuracies in a network of GNSS reference stations by Dabove, Paolo; Manzino, Ambrogio; De Agostino, Mattia


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