论文信息 - VITERBI AND SERIAL DEMODULATORS FOR PRE-CODED BINARY GMSK

VITERBI AND SERIAL DEMODULATORS FOR PRE-CODED BINARY GMSK

Three different demodulators applicable to the coherent demodulation of binary Gaussian Minimum Shift Keying (GMSK) signal are described and their performance compared. These include a near-optimal trellis demodulator, which utilizes two matched filters and Viterbi algorithm to carry out maximum likelihood sequence estimation, and a singlefilter threshold demodulator with and without pulse equalization. The performance of these demodulators in noise and adjacent channel interference (ACI) are compared for several signal BT products. The equalized threshold demodulator is shown to perform nearly as well as the near-optimal trellis demodulator in additive white Gaussian noise (AWGN), and substantially outperform the trellis demodulator under severe ACI condition.

Kuang Tsai | Gee L. Lui

[1] Ghassan Kawas Kaleh,et al. Simple coherent receivers for partial response continuous phase modulation , 1989, IEEE J. Sel. Areas Commun..

[2] Kuang Tsai,et al. DATA-AIDED SYMBOL TIME AND CARRIER PHASE TRACKING FOR PRE-CODED CPM SIGNALS , 1999 .

[3] Kuang Tsai,et al. BINARY GMSK: CHARACTERISTICS AND PERFORMANCE , 1999 .

[4] Pierre A. Laurent,et al. Exact and Approximate Construction of Digital Phase Modulations by Superposition of Amplitude Modulated Pulses (AMP) , 1986, IEEE Trans. Commun..

[5] G. L. Lui. Threshold detection performance of GMSK signal with BT=0.5 , 1998, IEEE Military Communications Conference. Proceedings. MILCOM 98 (Cat. No.98CH36201).