Open AccessFractional Multi‐bit Differential Detection Technique for Continuous Phase Modulation
Author(s) -
Lee KeeHoon,
Seo JongSoo
Publication year - 2004
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.04.0103.0065
Subject(s) - minimum shift keying , additive white gaussian noise , continuous phase modulation , bit error rate , phase shift keying , electronic engineering , interference (communication) , frequency shift keying , algorithm , modulation (music) , channel (broadcasting) , computer science , mathematics , demodulation , telecommunications , physics , engineering , acoustics
A new low‐complexity differential detection technique, fractional multi‐bit differential detection (FMDD), is proposed in order to improve the performance of continuous phase modulation (CPM) signals such as Gaussian minimum shift keying (GMSK) and Gaussian frequency shift keying (GFSK). In comparison to conventional one‐bit differential detected (1DD) GFSK, the FMDD‐employed GFSK provides a signal‐to‐noise ratio advantage of up to 1.8 dB in an AWGN channel. Thus, the bit‐error rate performance of the proposed FMDD is brought close to that of an ideal coherent detection while avoiding the implementation complexity associated with the carrier recovery. In the adjacent channel interference environment, FMDD achieves an even larger SNR advantage compared to 1DD.