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A Method of Intermediate Frequency Galileo E1 Signal
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Generating Based on MultiSatellites
WU Zhongjie，MAO Xuchu
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(Department of Instrument Science and Engineering, Shanghai Jiaotong University,
Shanghai 200240, China)
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Abstract A method to generate Galileo E1 intermediate frequency (IF) digital signal for simulation of Galileo signal based on multisatellites with BOC (1,1) modulation was presented. This Galileo IF digital signal can serve as reliable data resource in the research of development of software receiver and highsensitivity Galileo receiver based on weak signal processing. The simulink models of Galileo IF signal was designed according to signal generation module needed in signal generator. Then Galileo IF signal was generated by PRN code, BOC modulation, navigation data of multisatellites, and carrier and modulated noise model with adjustable intensity. The experimental results by signal processing with autocorrelation and signal acquisition show that Galileo IF signal with adjustable carriertonoise ratio and Doppler shift has all the characteristics of BOC modulation and real Galileo signal, and that it can be used in signal processing in software receiver.
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Received: 09 December 2009
Published: 28 September 2010
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