  In space applications, hardware (HW) implementation is made more expensive
not only by the levels of performance required, but also by complex and
rigorous HW qualification tests. Reducing qualification cost and time is thus a
key design requirement. In this paper, a new versatile transmitter is proposed
for space telemetry, capable of soft-switching across different linear and
continuous phase modulation schemes while maintaining the same hardware
structure. This permits a single HW qualification to ``cover'' diverse uses of
the same hardware, and thus avoid re-qualification in case of configuration
changes. The envisaged solution foresees the use of a single filter, suitable
not only for linear modulations such as M-QAM, but also for continuous phase
modulation methods. At this stage, we focus on pulse code modulation/frequency
modulation (PCM/FM), for which we propose a minimum mean square error (MMSE)
algorithm. The proposed algorithm, which adds to the system flexibility and
effectiveness, may use a single first filter based on Laurent decomposition for
initialization, if needed. Performances are assessed using the mean square
error (MSE) measure between the proposed MMSE-modulated signal and the
completely modulated signal. Simulation results confirm that the proposed
algorithm leads to MSE values that are lower than the case of Laurent
decomposition using the first component only.
