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http://dx.doi.org/10.7840/kics.2013.38B.10.824

The Demodulation for Bipolar Delta Driven GMSK  

Bang, Seung-Cheol (동서울대학교 정보통신과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.38B, no.10, 2013 , pp. 824-831 More about this Journal
Abstract
The delta driven GMSK is a modulation scheme to generate the gaussian pulse by the bipolar delta signal and to modulate the phase function with the differential gaussian pulse between $+T_b/2$ and $-T_b/2$. The demodulation of delta driven GMSK differs from conventional GMSK schemes. This paper proposed a demodulation with the differential phase detector at the end of each bit interval. A designed detector then finds the one of the possible region by hard decision, in which the phase difference lies. Finally the binary data can be recovered by state transition process. Through the BER simulation for AWGN channel, it was found that the proposed demodulation effected by the run length of binary data. The simulated BER degradation of about 2[dB] was analyzed, as compared to the theoretical coherent demodulation with $BT_b$=0.3.
Keywords
GMSK; Delta GMSK; Phase Demodulation; BER; GLPF;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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