detection vs signal detection

detection and signal detection both are nouns.

Word	Noun	Adjective	Verb	Adverb
detection	Yes	No	No	No
signal detection	Yes	No	No	No

As nouns, detection and signal detection are synonyms defined as:

detection and signal detection: the detection that a signal is being received

detection (noun)	signal detection (noun)
the act of detecting something; catching sight of something	the detection that a signal is being received
a police investigation to determine the perpetrator
the perception that something has occurred or some state exists
the detection that a signal is being received