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Half-bit offset decision frequency detection of differentially encoded GMSK signals

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2 Author(s)
K. Ohno ; NTT Radio Communication Systems Laboratories, Yokosuka, Japan ; F. Adachi

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.

Published in:

Electronics Letters  (Volume:23 ,  Issue: 24 )