Q2. The BFSK (binary frequency shift keying) signaling waveforms representing 'O' and 'l' are 55. (1) - Acos(2x1.2x10°:) "0" sent 15. (1) - Acos(2 0.8x10°:) "1" sent where A=1.414 mV. Assume equiprobable ones and zeros, and that the data rate is 400 Kbps. The modulated signal is received in the presence of additive white Gaussian noise (AWGN) with single-side power spectral density of N=10-12 W/Hz. 1. Estimate the bandwidth of the modulated signal. 2. Estimate the bandwidth efficiency of the modulated signal. 3. Does the answer in 2) give the maximum bandwidth efficiency that can be achieved via the BFSK modulation? Why. 4. Sketch a coherent receiver for the modulated signal, giving all details. 5. Determine the bit error rate (BER) for the receiver in 4).