"complexity comes from" is a correct and usable phrase in written English.
It is typically used to explain the root cause or source of complexity in a situation or problem. Example: The complexity of human behavior comes from the combination of biological, psychological, and societal factors that influence our actions and decisions.
The description of the proposed channel estimation method in Section 3 shows that the overall complexity comes from complex matrix operations in the relay terminals and the destination terminal.
Figure 7 SER of the iterative symbol detection versus the iteration number under dB, The description of the proposed channel estimation method in Section 3 shows that the overall complexity comes from the complex matrix pseudoinverse operation in (16).
IoT is a complex system in which its complexity comes from number of networks involved, the interconnectivity of the components of the IoT, and the interaction with the environment.
Complexity comes from chasing and blocking their rat-like escape routes through existing codes.
People's complexity comes from their language, identities, histories, faiths and cultures.
Part of the complexity comes from the enhanced organization program, Adobe Elements 10 Organizer, that collects all of your photos and videos, but is really a separate program.
A recent example of this complexity came from Minnesota where protesters took to the streets.
He shows how Yahoo's organizational complexity came from the rush to keep up with the early Internet users.
Where does this complexity come from?
Further complexities come from the panoply of choices the departing and remaining states would make after the fall.
Complexity comes about from the multiplicity of damage processes which occur during the simultaneously changing temperatures and loads, characteristic of TMF.
