What is a characteristic of orthogonal frequency division multiplexing (OFDM) channel subcarriers?

The characteristic of orthogonal frequency division multiplexing (OFDM) channel subcarriers being able to be modulated at the maximum order of modulation for a given bandwidth is an important aspect of how OFDM works. This capability allows OFDM to efficiently utilize the available bandwidth by enabling the transmission of multiple signals simultaneously over different subcarriers. Each subcarrier can be modulated independently, allowing for high data rates and better spectral efficiency.

In OFDM, subcarriers are closely spaced but orthogonal, which means they can be packed tightly together without interfering with one another. This orthogonality enables each subcarrier to achieve the maximum modulation order, such as Quadrature Amplitude Modulation (QAM), without degrading the performance of the overall signal. By employing techniques that allow it to use advanced modulation schemes on each subcarrier, OFDM can support high data throughput, making it suitable for various applications like broadband internet and digital television.

The other choices do not accurately represent characteristics of OFDM subcarriers. For instance, the static nature of subcarriers is not true in dynamic network conditions where adjustments are essential for optimal performance. Additionally, while OFDM does offer bandwidth efficiency, it does not inherently require less bandwidth than traditional methods; rather