ERROR-PROBABILITY OF COHERENT DETECTION FOR TRELLIS-CODED PARTIAL-RESPONSE CPM ON RICIAN FADING CHANNELS

A coherent receiver for interleaved partial response trellis-coded con tinuous phase modulation (TC-CPM) is derived. A true upper bound on th e bit error probability for flat fading channels is derived by showing that TC-CPM is equivalent to a trellis-coded moduloation scheme. The upper bound is evaluated by defining an error-state diagram along with a set of characteristic distances and then applying transfer function bounding techniques. Comparison with simulation results shows the upp er bound tight to within 1.5-2 dB.