By Dabove, Paolo; Manzino, Ambrogio; De Agostino, Mattia
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Additional info for Achievable positioning accuracies in a network of GNSS reference stations
2010) use this approach for Galileo E1 OS signal acquisition. Essentially, for the channel combining acquisition approach (common or different frequencies), in each involved channel, an acquisition strategy belonging to either the stand-alone or the external-aiding approach is performed. Then the acquisition outputs from all the channels are combined in different ways. In Section 6, the joint data/pilot acquisition strategies for Galileo E1 OS signal is introduced as an example for this approach.
Therefore, the values of Gm , f¯dm in (6) are constant for all m ∈ [0, M − 1]. The signal component AiS of an arbitrary span-i (Ai ) in (35) can be represented as AiS|τ, with fd = M ∑ G2 e j2πi f d Tint (37) m =i f d = f d1 = ... = f d M √ G = G1 = ... = G M = 2C R[τ ]sinc( (38) f d Tint ) For the GDC technique, substituting (37) into (36), SGDC is computed SGDC = | D |2 = M −1 ∑ 2 G2 e j2πi f d Tint (39) i =1 Equation (39) shows that the residual carrier phase is still present in the dGDC . This fact causes an unpredictable loss, which depends on the speciﬁc value of f d .
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 6SDQ0 &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.