This paper is on the derivation of the soft decision metric of turbo codes for the Noncoherent (NC) M-ary FSK (M=2, 4 and 8) using punctured turbo code for the mobile applications whose channels are modeled by Rayleigh and Nakagami-m distribution. Initially we develop the method of unified metric calculation of turbo code suitable for the respective order of modulation M (of NC-MFSK). The results of computer simulation show that application of properly selected punctured turbo code can enhance the BER performance of the NCMFSK under the adverse effect of mobile channels.
['Mona Nasseri', 'Junghwan Kim', 'Mansoor Alam']
Unified metric calculation of sampling-based turbo-coded noncoherent MFSK for mobile channel