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http://dx.doi.org/10.7840/kics.2013.38B.7.581

The GMSK Modulation for Bipolar Delta Signal  

Bang, Seung-Cheol (동서울대학교 정보통신과)
Lee, Woo-Sang (동서울대학교 정보통신과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.38B, no.7, 2013 , pp. 581-588 More about this Journal
Abstract
In the basic GMSK, the modulated signals are generated by the preprocessing of NRZ pulse trains with the gaussian low pass filter. In this paper, we proposed the GMSK modulation system with the delta pulse trains. The proposed system constructed with the gaussian pulse generator triggered by the bipolar delta pulse, the differentiator between $+T_b/2$ and $-T_b/2$, and then a matched filter for frequency-modulation function. The spectrum of proposed system was found to be smaller than about 35[%] at 40[dB] attenuated bandwidth, and the center spectrum to be lower than the basic GMSK with zero-crossing property.
Keywords
GMSK; Modulation; Bandwidth-Time Product; GLPF; Phase Modulation;
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