Technical informations - Modern Waveforms
There are several types of waveforms, which are using for the new HF communications but now, one of the best solutions is offered from a single-tone modems for HF transmission able to send at high rates; from 150 to 9600 bps. See here a brief description
System	auto detect  baud speed	Type of Modulation	Baudrate	Interleavers, sec	Type of Coding
110A single tone (150..2400 bps)	Yes	single-tone BPSK, QPSK, 8PSK	150, 300, 600, 1200, 2400, 4800 (uncoded)	block-based 0, 0.6, 4.8	convolutional (133,171), 1/8 ... 1/2
110A (App B) 39-tone	No	OFDM, QDPSK	75, 150, 300, 600, 1200, 2400	depends on rate, from 0 to 6.48	Reed-Solomon, 10/14, 3/7
110B App.C / 4539 HDR	Yes	single-tone QPSK, 8PSK, 16, 32 and 64QAM	3200, 4800, 6400, 8000, 9600, 12800 (uncoded)	block-based 0.12, 0.36, 1.08, 2.16, 4.32, 8.64	convolutional (133,171), 3/4 with tail-biting
STANAG 4415	Yes	orthogonal signals, 4-ary Walsh functions, BPSK	75	block-based 0, 0.6, 4.8	convolutional (133,171), 1/32
STANAG 4285	No	single-tone, BPSK, QPSK, 8PSK	75, 150, 300, 600, 1200, 2400	convolutional, 0.853, 10.24	convolutional (133,171), 1/16, 1/8, 1/4,1/2, 2/3
STANAG 4529	No	single-tone, BPSK, QPSK, 8PSK	75, 150, 300, 600, 1200	convolutional, 1.706, 20.48	convolutional (133,171), 1/8, 1/4,1/2, 2/3
STANAG 4538 BW2	Yes	single-tone, 8PSK	up to ~4400	no interleaver	convolutional (235, 275, 313, 357), 1/1 to 1/4
STANAG 4538 BW3	Yes	orthogonal signals, 16-ary Walsh functions, BPSK	up to ~573	block-based, up to 7.2	convolutional (133,171) 1/12 to 1/24