Title :
Half-bit offset decision frequency detection of differentially encoded GMSK signals
Author :
Ohno, Kizuku ; Adachi, Fumiyuki
Author_Institution :
NTT Radio Communication Systems Laboratories, Yokosuka, Japan
Abstract :
An efficient frequency detection scheme for GMSK signal reception is described. In this detection scheme, a three-level eye opening of the frequency detector output at the decision instant offset by a half-bit is used to improve bit error rate (BER) performance. Experimental results for 16 kbit/s differentially encoded GMSK transmission with a premodulation filter bandwidth-bit duration product (Bb T) = 0¿25 (typical for mobile radio applications) show that the half-bit offset decision frequency detection scheme can significantly improve BER performance, in comparison with conventional detection schemes.
Keywords :
demodulation; digital communication systems; digital signals; error statistics; minimum shift keying; mobile radio systems; radiocommunication; signal detection; 16 kbit/s; BER performance; Gaussian-filtered minimum shift keying; MSK; bit error rate; differentially encoded GMSK signals; digital transmission modulation; frequency detection scheme; half-bit offset decision; mobile radio; signal reception; three-level eye opening;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870907
