beginning of cleaner OFDM demod code #1363

Job	Run time
build_debian_buster	3m 18s
build_debian_bookworm	3m 44s
build_debian_bullseye	3m 10s
build_android	11m 34s
build_debian_sid	3m 32s
build_macos_arm	2m 53s
build_macos_intel	8m 45s
build_raspios_bullseye_armhf	8m 57s
build_ubuntu_focal	3m 35s
build_ubuntu_jammy	3m 12s
build_ubuntu_mantic	3m 26s
build_ubuntu_noble	3m 44s
build_windows	12m 30s
check_formatting	14s
check_spelling	16s
create_full_archive	10s
update_nightly_release	0s
	1h 13m 0s

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