  In this paper, we study the feasibility of coupling the PN ranging with
filtered high-order modulations, and investigate the simultaneous demodulation
of a high-rate telemetry stream while tracking the PN ranging sequence.
Accordingly, we design a receiver scheme that is able to perform a parallel
cancellation, in closed-loop, of the ranging and the telemetry signal
reciprocally. From our analysis, we find that the non-constant envelope
property of the modulation causes an additional jitter on the PN ranging timing
estimation that, on the other hand, can be limited by properly sizing the
receiver loop bandwidth.
  Our study proves that the use of filtered high-order modulations combined
with PN ranging outperforms the state-of-the-art in terms of spectral
efficiency and achievable data rate, while having comparable ranging
performance.
