Trellis Coded Hybrid 2FSK/4PSK with Expurgated Phase Code

概要

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The performance of trellis coded hybrid frequency and phase shift modulation (TC HFPSK) with the expurgated phase code and the asymmetric signal constellation is investigated by using the minimum squared free Euclidean distance d^2_ltfreegt and the bit error rate (BER). It is found that TC hybrid 2FSK/4PSK with the expurgated phase code shows larger d^2_ltfreegt than the corresponding TC hybrid 2FSK/4pSK with the complete phase code for varying the angle φthat determines the asymmetric signal constellation. The maximum value of d^2_ltfreegtof TC hybrid 2FSK/4PSK with the expurgated phase code can be obtained when the signal constellation is symmetric. The performance of BER is analyzed in additive white Gaussian noise (AWGN) and fading channels by using uniform error property and error bound based on transfer function. It is found that the coding gain of TC hybrid 2FSK/4PSK with the expurgated phase code over uncoded hybrid 2FSK/2PSK at BER = 10^lt-4gt are 2.71 dB and 4.74 dB in AWGN and fading channels, respectively. The performance improvements of TC hybrid 2FSK/4PSK with the expurgated phase code over TC 8PSK at BER = 10^lt-4gt are 0.68 dB and 4.07 dB in AWGN and fading channels, respectively.
社団法人電子情報通信学会の論文
1995-05-25