I would like to know what is the modulation technique used on the New Horizons Spacecraft? Is it BPSK or GMSK? Also what is the coding technique-turbo-codes or LDPC codes? And do you have a link budget available?
Phil has explained it nicely. Yes, it is BPSK with R=1/6 Turbo coding, that is used in New Horizons. Some aspects of the X band digital receiver used is discussed here. For the coding enthusiasts, I can add that the Blocklength is k=1784 bits (even though it is programmable, for low data rate support, this minimum block length is used). The information code length (post coding) n =(k+4)/R=10728 bits.