The performance of phase locked transparent tone-in-band with symmetric phase detection

Transparent tone-in-band (TTIB) creates a spectral gap by splitting a signal into frequency bands, which are then separated by modulation. Phase locked transparent-tone-in-band (PLTTIB), in its original form, contained an unacceptably high level of self-noise in the coherent band recombination process. A performance analysis of PLTTIB with symmetric phase detection is given. Several new results are highlighted including the effect of recombination phase error on bit-error rate, the mean-square phase error, the probability density function of phase error, and the pull-in time of the phase tracker. Although the detailed results are obtained only for static channels, a qualitative assessment of the effect of fading is given