GLONASS Navigation Message Format for Flexible Row Structure

A.A. Povalyaev

Abstract:	Navigational Messages (NM) developed during GPS and GLONASS definition period and have been utilizing in these systems until nowadays are the hard religiously periodical structures consist of pages (frames), subframes and words (strings). Though simplicity and naturalness these structures are very conservative. Possibility of subsequent modernizations of such NM is constrained by using only previously stored up reserve bits. big number of reserve bits leads to ineffective using of NM transmission channel capacity. small number of reserve bits decreases possibilities of NM subsequent modernization. It is used in L5 GPS signal as a principle of different NM structure. Transmission is implemented as flexible definite type string stream. Each string content is defined by its type. NM modernization with such structure is implemented by addition new type strings in string stream. User's receiver designed before introducing into practice new type of strings will reject strings with unknown types from receiving stream keeping at the same time its ability to work. As a result it is reached backward compatibility. This paper is considered principles of GLONASS NM formation with flexible string structure.
Published in:	Proceedings of the 26th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2013) September 16 - 20, 2013 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	972 - 974
Cite this article:	Povalyaev, A.A., "GLONASS Navigation Message Format for Flexible Row Structure," Proceedings of the 26th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2013), Nashville, TN, September 2013, pp. 972-974.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In