Question: Consider a mobile wireless orthogonal FDM (OFDM) system that is intended to operate in a vehicle with speeds up to 80 km/hr in an urban environment having a coherence bandwidth of 100 kHz. The carrier frequency is 3 GHz. and it is required that data be transmitted at a symbol rate of 1024 k symbols/s. Choose an appropriate subcarrier plan, with the following goals: 1) avoid the use of an equalizer. and 2) minimize any effects due to fast fading. The plan should address how many sub-carriers should be used, how far apart in frequency they should be separated. and what value of symbol rate per subcarrier should be used.