TY  - RPRT
TI  - Multipath/RFI/modulation study for DRSS-RFI problem: Voice coding and intelligibility testing for a satellite-based air traffic control system
AU  - Birch, J. N.
AU  - Getzin, N.
PY  - 1971
UR  - https://ntrs.nasa.gov/citations/19720020051
ID  - 19720020051
ER  -