Question

Which among the following is a challenge for spectrum decision models?

(a) Combining multiple characterization parameters

(b) Supporting OFDM networks

(c) Supporting multiple spectrum bands

(d) Maintaining a decision model for each characterization parameter

I have been asked this question during a job interview.

The origin of the question is Next Generation Wireless Network in section Next Generation Wireless Network of Cognitive Radio

Answer 1

Correct choice is (a) Combining multiple characterization parameters

The explanation: Spectrum decision models can be built for various characterization parameters such as signal to noise, date rate, error rate, and other parameters that affect the quality of service. However a decision model combining several spectrum parameters is not available. Spectrum decision models support OFDM networks that have multiple spectrum bands operating simultaneously for transmission.