Title :
HF channel sounding with polyphase CAZAC sequences
Author :
Röhrs, U.H. ; Linde, L.P.
Author_Institution :
Dept. of Electron. & Comput. Eng., Pretoria Univ., South Africa
fDate :
8/30/1991 12:00:00 AM
Abstract :
An alternative to the frequency modulated continuous wave (FMCW) or `chirp´ channel sounder is presented. The suggested coded pulse sounder employs polyphase constant amplitude zero auto-correlation (CAZAC) sequences as opposed to the more commonly used maximal-length pseudo noise (PN) sequences. This paper presents techniques for extracting HF ionospheric layer height (or `range´) and velocity data using the coded pulse technique. The validity of the proposed channel sounder is verified by computer simulation
Keywords :
correlation methods; height measurement; ionospheric measuring apparatus; ionospheric techniques; pulse-code modulation; HF channel sounding; HF ionospheric layer height; coded pulse sounder; computer simulation; constant amplitude zero autocorrelation sequences; polyphase CAZAC sequences; radiosounding method; technique; Acoustic noise; Autocorrelation; Chirp modulation; Data mining; Equations; Frequency; Hafnium; Modulation coding; Piecewise linear approximation; Pulse modulation;
Conference_Titel :
Communications and Signal Processing, 1991. COMSIG 1991 Proceedings., South African Symposium on
Conference_Location :
Pretoria
Print_ISBN :
0-7803-0040-8
DOI :
10.1109/COMSIG.1991.278231
