Performance of bit-by-bit interleaved trellis coded 16DAPSK on Rayleigh fading channel

We propose a bit-by-bit interleaved trellis coded 16DAPSK modulation with differential detection. The performance of the proposed system is evaluated on Rayleigh fading channels in terms of the bit error rate (BER) by numerical analysis and computer simulation. As the bit-by-bit interleaving induces more diversity effect than the symbol-by-symbol interleaving, the proposed system shows better BER performance than that of the conventional symbol-by-symbol interleaved trellis coded system. Moreover, at high E_b/N₀, the BER of the proposed system is better than that of the symbol-by-symbol interleaved system based on coherent detection with perfect channel state information (CSI) in spite of the fact that the proposed system requires no CSI. We conclude that the proposed system is suited for land mobile radio communication systems