PERFORMANCE OF IREC-MHPM IN THE PRESENCE OF ADJACENT CHANNEL INTERFERENCE

The effect of adjacent channel interference (ACI) on the error probabi lity of the rectangular frequency pulse multi-h phase-coded modulation (1REC-MHPM) is studied. Evaluations through simulation were done for different values of the absolute adjacent channel frequency spacing \D elta f\, different time delay tau between the main channel and the int erfering channel; and schemes with different number of modulation inde xes. It is found that ACI's effect can only be eliminated when \Delta f\ approaches 2.0. Comparison with minimum shift keying (MSK) is also made through simulation.