CISC 7332X Spring 2021 Midterm Exam

1. 968 terabits per second; 8 * ((10000.0kg / 0.000250) * 512GB) / (4700km / 100km/h ); 8 * ((10000.0 / 0.000250) * 0.512) / ((4700 / 100 )*3600)
2. d
3. 0.512 microseconds
4. b
5. c
6. a
7. b
8. b
9. 96Mbps
10. M=8; % 96Mbps = 2 * 16 * log M;   3 = log M 
11. 6868 bps; 8000.0 - 8000.0 * -(0.98*log(0.98)/log(2) + 0.02*log(0.02)/log(2))
12. 1.7kHz; 6868 = 2 * B * log(4); B = 1717Hz
13. 15;  6868 =  1717 * log(SNR+1)/log(2); 4 = log(SNR+1)/log(2); SNR = 15
14. 12kHz; 48Kbps = X * log( (30+2)/2 ) /log(2) ; X=12kHz
15. -1.09; 10 * log ( 7.0 / 9.0 ) /log(10)
16. 11.76; 10 * log(15)/log(10)
17. ~64kbps; SNR=~15; 16 * log(15+1)/log(2) = ~64kbps
18. d
19. d
20. a