Abstract: A new receiver for convolutionally coded and differential amplitude phase shift keying modulation using iterative decoding is proposed. Performance close to that of coherent detection over an additive white Gaussian noise channel is demonstrated. Also, an optimum decoding of the trellis-code encoded by the schemes proposed by Lin, et al outperforms their suboptimum decoding, even though the decoding delay of each of their schemes and this decoder are longer than that of a conventional trellis coded modulation or convolutional codes.

Key words: noncoherent detection, trellis-coded modulation, differential amplitude phase shift keying modulation, a posterior probability estimation, convolutional codes, iterative decoding, trellis-codes