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| A Baseband GMSK Signal Correlator and Its Output Probability Distribution |
| He Xian-deng; Pei Chang-xing; Meng Yun-liang |
| The State Key Lab of Integrated Services Networks, Xidian Univ., Xi'an 710071, China |
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Abstract A type of baseband GMSK signal correlator is presented in this paper. From the phase probability density function of demodulated GMSK signal and the probability distribution function of the sums of independent identical distribution random variables, the auto-correlation and cross-correlation functions of the correlator are proposed. A uniform auto-correlation and cross-correlation probability distribution functions of digital correlator(digital matched filter) is derived from the probability and statistics theory. Numerical results demonstrate that the error probability of the baseband GMSK signal correlator is about one order of magnitude lower than that of digital one under the same condition.
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Received: 22 December 2008
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2009, Vol. 31 
