* [https://en.wikipedia.org/wiki/Amplitude-shift_keying Amplitude Shift Keying (ASK )] is very inefficient and susceptible to interference for wireless (but can be useful over fiber optics or copper).* [https://en.wikipedia.org/wiki/Frequency-shift_keying Frequncy Shift Keying (FSK )] is less susceptible to errors and interference than ASK because interference is often confined to a specific frequency.* [https://en.wikipedia.org/wiki/Phase-shift_keying Phase Shift Keying (PSK )] is the least susceptible to error of these three. In terms of bit error rate (BER), binary PSK is about twice as good as ASK and FSK in the presence of noise, and the BER can be significantly improved through other techniques.*[https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing Orthogonal frequency-division multipleing (OFDM)] can also be used. It is very spectrally efficient. <ref>https://space.stackexchange.com/questions/15428/what-is-the-advantage-of-qpsk-over-fsk-or-ask-for-satellite-data-transmission</ref>

* [https://en.wikipedia.org/wiki/Amplitude_modulation Amplitude Modulation (AM )] is efficient in terms of bandwidth and has simple receiver circuit but subjected to amplitude variations due to noise and interference* [https://en.wikipedia.org/wiki/Frequency_modulation Frequency Modulation (FM )] is less susceptible to interference and noises. But has complex circuits and requires large bandwidth.* [https://en.wikipedia.org/wiki/Phase_modulation Phase Modulation (PM )] is not affected by channel noise but on the other hand it has complex circuit as compare to AM and FM.