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Hi
I found this confusing question on some web sites:

Which spread spectrum technologies exhibit resistance to narrowband RF interference
by design?

in the SG:
1. As is the case with all
spread spectrum technologies, frequency hopping systems are resistant?¡é?€?¡±but not
immune?¡é?€?¡±to narrow band interference.
2.A DSSS signal is more
susceptible to narrow band interference than FHSS because the DSSS band is much
smaller (22 MHz wide instead of the 79 MHz wide band used by FHSS) and the
information is transmitted along the entire band simultaneously instead of one frequency
at a time.

The key in the question is: "by design?". The answer is FHSS. Although not really used anymore except in legacy systems, FHSS is the most resistant to narrowband interference. DSSS and OFDM have to be somewhat resistent to narrowband interference, but their main design goal was more speed.

Take care,

ThAnKs Man :)

You are very welcome!