Title :
Noncoherent sequence detection of trellis coded CPFSK over Rician channels
Author :
Teng, Chen-Chia ; Fonseka, John P. ; Korn, Israel
Author_Institution :
Sch. of Eng. & Comput. Sci., Texas Univ., Dallas, TX, USA
Abstract :
In this study, noncoherent sequence detection of trellis coded continuous phase frequency shift keying (CPFSK) signals is considered over Rician fading channels with maximum ratio combining (MRC) diversity. A soft decision differential phase detector (SD-DPD) that chooses a differential phase subregion among a preselected set of subregions at the end of every interval is considered. The output of the SD-DPD is then used to calculate metrics for Viterbi decoding. Different trellis codes are analyzed over fading channels with different fading parameters, different numbers of diversity branches, and different numbers of differential phase subregions in the SD-DPD. Numerical results indicate that a suboptimal receiver that maintains the same set of metrics for all signal-to-noise ratios (SNR) performs close to optimal decoding
Keywords :
Rician channels; Viterbi decoding; continuous phase modulation; differential detection; diversity reception; frequency shift keying; maximum likelihood detection; modulation coding; noise; phase detectors; radio receivers; trellis codes; MRC diversity; Rician channels; SNR; Viterbi decoding; continuous phase frequency shift keying; differential phase subregion; differential phase subregions; diversity branches; fading channels; fading parameters; maximum likelihood sequence detection; maximum ratio combining diversity; noncoherent sequence detection; optimal decoding; signal-to-noise ratios; soft decision differential phase detector; suboptimal receiver; trellis coded CPFSK; trellis codes; Convolutional codes; Decoding; Diversity reception; Fading; Frequency shift keying; Phase detection; Phase frequency detector; Rician channels; Signal to noise ratio; Viterbi algorithm;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944139
