On the Use of Subcarriers in Future Space Missions

In this paper, the use of residual carier techniques with no subcarrier (PCM/PM) will be advocated. It will be shown that the use of the PCM/PM technique under appropriate conditions will reap many advantages without sacrificing performance. Foremost amoung these advantages is the lower bandwidth, which can be extremely useful when antenna arraying is employed or when tracking multiple spacecraft signals within the field of view of a single antenna.