New PDF release: Achievable positioning accuracies in a network of GNSS

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

ISBN-10: 953307843X

ISBN-13: 9789533078434

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However this has a signiﬁcant impact on the size of succeeding stages. 3 Carrier mixer ( N1 ) The carrier mixer basically multiplies the input signal with the local carrier bits. Since the resulting values will only have 8 levels {±1, ±2, ±3, ±6}, a 3-bit encoding is sufﬁcient. Observe that with the 3-bit encoding, arithmetic operation cannot be directly performed. Hence if the succeeding stage requires an arithmetic representation then four bits should be used. 4 Subcarrier generator & subcarrier modulator ( Nre f ) The local code takes on values of either 0 or 1 and hence 1-bit is sufﬁcient for its representation.

6025 Table 5. Aiding data, indoor, Rb Fig. 11. , 1999). Each channels shares 50 % of the total transmitted power. To represent this signal, the common representation in (1) is changed to 1 √ r [n] = √ 2C (d[n + τ ]b[n + τ ] − c2nd [n + τ ]c[n + τ ]) cos (2π ( f IF + f D )nTS + φ) + nW [n] 2 (49) b[n], c[n] are respectively the 4-ms primary PRN codes of the data (B) and pilot (C) channels modulated by BOC(1,1) scheme; d[n] is the navigation data in the B channel; c2nd [n] is the secondary code, which together with c[n] form a 100-ms tiered code for the C channel (GalileoICD, 2008).

Lee, S. J. (2002). A Novel Weak Signal Acquisition Scheme for Assisted GPS, Proceedings of the ION GPS 2002, Portland, OR, USA, pp. 177–183. Corazza, G. E. & Pedone, R. (2007). Generalized and Average Likelihood Ratio Testing for Post Detection Integration, IEEE Transactions on Communications 55: 2159–2171. Dafesh, P. , Nguyen, T. M. & Lazar, S. (January 1999). Coherent Adaptive Subcarrier Modulation (CASM) For GPS Modernization, Proceedings of ION NTM 1999, San Diego, CA, USA, pp. 649–660. Park, S.

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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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