What does the Nyquist theorem define in relation to wireless communication?

The Nyquist theorem is fundamental in the field of communication theory, particularly in defining the maximum data rate for a communication channel. It states that the maximum data rate that can be transmitted without distortion is directly related to the bandwidth of the channel and the signal-to-noise ratio available. In essence, it establishes a relationship between bandwidth and maximum data transmission capacity, indicating that higher bandwidth and a better signal-to-noise ratio allow for a greater potential data rate. This is crucial in wireless communication, as it helps engineers understand how to optimize data transmission to avoid distortion and maintain signal integrity. The theorem's implications are significant for designing systems that seek to maximize communication efficacy within the limits of available resources.

The other options address different aspects of wireless communication but do not capture the essence of what the Nyquist theorem specifically defines. For instance, antenna design, power requirements, and types of interference are all important factors in wireless communication, but they are separate from the definitions provided by the Nyquist theorem regarding data rates and channel capacity.