PSK versus QAM for iterative decoding of bit-interleaved coded modulation

Optimized Mappings for Iteratively Decoded BICM on Rayleigh Channels with Interleaving

“…Note, beside its dependency via Re{y -y} and Im{y-} on the rotation of the SCS around the origin, hannel can be DE'Q (v>) has an additional dependency on the channel quality diversity [9] Es/No, similar to the cost function for a simple AWGN FIQ shall facil-channel (see, e.g. [5,6]). Analysis tools for this dependency nd quadrature are presented in [6].…”

“…Analysis tools for this dependency nd quadrature are presented in [6]. The optimum mappings ,u and rotation angles 0 (assumed counter-clockwise) for some SCSs, e.g., standard 16QAM, T 4 16PSK (which was found to be more suited for BICM-ID than (4) 16QAM [6]), and the non-regular SCS 17°-16PSK [6,13], are given in Fig. 2.…”

“…The cost function D[1Q1(ju) can now be used in a search y112 (3) algorithm such as a binary switching algorithm [5] or the exhaustive search algorithm presented in [6], which ensures a global optimum. Note, beside its dependency via Re{y -y} and Im{y-} on the rotation of the SCS around the origin, hannel can be DE'Q (v>) has an additional dependency on the channel quality diversity [9] Es/No, similar to the cost function for a simple AWGN FIQ shall facil-channel (see, e.g.…”

“…[3][4][5][6][7], has been done to develop optimum mappings for different channels and SCSs. In this paper we derive an appropriate cost function for a Rayleigh channel with IQ interleaving [4,6,8].…”

“…[3][4][5][6][7], has been done to develop optimum mappings for different channels and SCSs. In this paper we derive an appropriate cost function for a Rayleigh channel with IQ interleaving [4,6,8]. With an IQ interleaver the in-phase (I) and quadrature (Q) component of a modulated symbol shall be made to fade independently to increase the signal space diversity [9].…”