Spectral Measurements of GNSS Satellite Signals Need for Wide Transmitted Bands

J-L. Issler, L. Ries, L. Lestarquit, O. Nouvel, Q. Jeandel

Abstract:	Some spectrum measurements of GNSS satellites have been performed recently. The GPS L1 and L2 signals have been observed through the Leeheim monitoring earth station. The associated measurements will be presented among others, in a first part of the paper. It can be seen that GPS P codes in L1 and L2 are unfiltered, presenting full secondary lobes. Spectrum measurements of a Chineese Beidou S-band signal are also presented. The main lobes are as wide as in the case of the BOC(2,2) GALILEO signal. In a second part of the paper, some perspective of these observations will be addressed, like the possibilities of P/Y code narrow correlation and the need for the superwide ALTBOC GALILEO E5 signal. A new innovation allowing to generate an ALTBOC signal with a constant envelope (8PSK-ALTBOC) will be presented. It allows the optimization of the power budget in the navigation payload. Some theory elements and some results concerning the interferences between GPS and GALILEO wide band signals in E5a/L5 band are also provided.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	445 - 460
Cite this article:	Issler, J-L., Ries, L., Lestarquit, L., Nouvel, O., Jeandel, Q., "Spectral Measurements of GNSS Satellite Signals Need for Wide Transmitted Bands," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 445-460.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In